[BAEL-19673] - Move articles out of jackson part 1

jackson-annotations/README.md

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+## Jackson Annotations
+
+This module contains articles about Jackson annotations.
+
+### Relevant Articles: 
+- [Guide to @JsonFormat in Jackson](https://www.baeldung.com/jackson-jsonformat)
+- [More Jackson Annotations](https://www.baeldung.com/jackson-advanced-annotations)
+- [Jackson Annotation Examples](https://www.baeldung.com/jackson-annotations)
+- [Jackson – Bidirectional Relationships](https://www.baeldung.com/jackson-bidirectional-relationships-and-infinite-recursion)
+- [Jackson – Change Name of Field](https://www.baeldung.com/jackson-name-of-property)
+- [Jackson Ignore Properties on Marshalling](https://www.baeldung.com/jackson-ignore-properties-on-serialization)

jackson-annotations/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>jackson-annotations</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>jackson-annotations</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-xml</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.module</groupId>
+            <artifactId>jackson-module-jsonSchema</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.rest-assured</groupId>
+            <artifactId>json-path</artifactId>
+            <version>${rest-assured.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>jackson-annotations</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <properties>
+        <assertj.version>3.11.0</assertj.version>
+        <rest-assured.version>3.1.1</rest-assured.version>
+    </properties>
+
+</project>

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/AliasBean.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonAlias;
+
+public class AliasBean {
+    
+    @JsonAlias({ "fName", "f_name" })
+    private String firstName;
+    
+    private String lastName;
+    
+    public AliasBean() {
+    
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/BeanWithCreator.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class BeanWithCreator {
+    public int id;
+    public String name;
+
+    @JsonCreator
+    public BeanWithCreator(@JsonProperty("id") final int id, @JsonProperty("theName") final String name) {
+        this.id = id;
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/BeanWithCustomAnnotation.java

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+package com.baeldung.jackson.annotation;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Date;
+
+import com.baeldung.jackson.annotation.BeanWithCustomAnnotation.CustomAnnotation;
+
+import com.fasterxml.jackson.annotation.JacksonAnnotationsInside;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+@CustomAnnotation
+public class BeanWithCustomAnnotation {
+    public int id;
+    public String name;
+    public Date dateCreated;
+
+    public BeanWithCustomAnnotation() {
+
+    }
+
+    public BeanWithCustomAnnotation(final int id, final String name, final Date dateCreated) {
+        this.id = id;
+        this.name = name;
+        this.dateCreated = dateCreated;
+    }
+
+    @Retention(RetentionPolicy.RUNTIME)
+    @JacksonAnnotationsInside
+    @JsonInclude(Include.NON_NULL)
+    @JsonPropertyOrder({ "name", "id", "dateCreated" })
+    public @interface CustomAnnotation {
+
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/BeanWithFilter.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonFilter;
+
+@JsonFilter("myFilter")
+public class BeanWithFilter {
+    public int id;
+    public String name;
+
+    public BeanWithFilter() {
+
+    }
+
+    public BeanWithFilter(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/BeanWithGetter.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonGetter;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonSetter;
+
+public class BeanWithGetter {
+    public int id;
+    private String name;
+
+    public BeanWithGetter() {
+
+    }
+
+    public BeanWithGetter(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    @JsonProperty("name")
+    @JsonSetter("name")
+    public void setTheName(final String name) {
+        this.name = name;
+    }
+
+    @JsonProperty("name")
+    @JsonGetter("name")
+    public String getTheName() {
+        return name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/BeanWithIgnore.java

@@ -0,0 +1,20 @@
+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+@JsonIgnoreProperties({ "id" })
+public class BeanWithIgnore {
+    @JsonIgnore
+    public int id;
+    public String name;
+
+    public BeanWithIgnore() {
+
+    }
+
+    public BeanWithIgnore(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/BeanWithInject.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JacksonInject;
+
+public class BeanWithInject {
+    @JacksonInject
+    public int id;
+    public String name;
+
+    public BeanWithInject() {
+
+    }
+
+    public BeanWithInject(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/ExtendableBean.java

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+package com.baeldung.jackson.annotation;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.fasterxml.jackson.annotation.JsonAnyGetter;
+import com.fasterxml.jackson.annotation.JsonAnySetter;
+
+public class ExtendableBean {
+    public String name;
+    private Map<String, String> properties;
+
+    public ExtendableBean() {
+        properties = new HashMap<String, String>();
+    }
+
+    public ExtendableBean(final String name) {
+        this.name = name;
+        properties = new HashMap<String, String>();
+    }
+
+    @JsonAnySetter
+    public void add(final String key, final String value) {
+        properties.put(key, value);
+    }
+
+    @JsonAnyGetter
+    public Map<String, String> getProperties() {
+        return properties;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/MyBean.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonGetter;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+import com.fasterxml.jackson.annotation.JsonSetter;
+
+@JsonInclude(Include.NON_NULL)
+@JsonPropertyOrder({ "name", "id" })
+public class MyBean {
+    public int id;
+    public String name;
+
+    public MyBean() {
+
+    }
+
+    public MyBean(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+    
+    @JsonGetter("name")
+    public String getTheName() {
+        return name;
+    }
+    
+    @JsonSetter("name")
+    public void setTheName(String name) {
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/PrivateBean.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
+
+@JsonAutoDetect(fieldVisibility = Visibility.ANY)
+public class PrivateBean {
+    private int id;
+    private String name;
+
+    public PrivateBean() {
+
+    }
+
+    public PrivateBean(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/RawBean.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonRawValue;
+
+public class RawBean {
+    public String name;
+
+    @JsonRawValue
+    public String json;
+
+    public RawBean() {
+
+    }
+
+    public RawBean(final String name, final String json) {
+        this.name = name;
+        this.json = json;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/UnwrappedUser.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonUnwrapped;
+
+public class UnwrappedUser {
+    public int id;
+
+    @JsonUnwrapped
+    public Name name;
+
+    public UnwrappedUser() {
+
+    }
+
+    public UnwrappedUser(final int id, final Name name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public static class Name {
+        public String firstName;
+        public String lastName;
+
+        public Name() {
+
+        }
+
+        public Name(final String firstName, final String lastName) {
+            this.firstName = firstName;
+            this.lastName = lastName;
+        }
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/UserWithIgnoreType.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreType;
+
+public class UserWithIgnoreType {
+    public int id;
+
+    public Name name;
+
+    public UserWithIgnoreType() {
+
+    }
+
+    public UserWithIgnoreType(final int id, final Name name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    @JsonIgnoreType
+    public static class Name {
+        public String firstName;
+        public String lastName;
+
+        public Name() {
+
+        }
+
+        public Name(final String firstName, final String lastName) {
+            this.firstName = firstName;
+            this.lastName = lastName;
+        }
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/Zoo.java

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+package com.baeldung.jackson.annotation;
+
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+
+public class Zoo {
+    public Animal animal;
+
+    public Zoo() {
+
+    }
+
+    public Zoo(final Animal animal) {
+        this.animal = animal;
+    }
+
+    @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = As.PROPERTY, property = "type")
+    @JsonSubTypes({ @JsonSubTypes.Type(value = Dog.class, name = "dog"), @JsonSubTypes.Type(value = Cat.class, name = "cat") })
+    public static class Animal {
+        public String name;
+
+        public Animal() {
+        }
+
+        public Animal(final String name) {
+            this.name = name;
+        }
+    }
+
+    @JsonTypeName("dog")
+    public static class Dog extends Animal {
+        public double barkVolume;
+
+        public Dog() {
+        }
+
+        public Dog(final String name) {
+            this.name = name;
+        }
+    }
+
+    @JsonTypeName("cat")
+    public static class Cat extends Animal {
+        boolean likesCream;
+        public int lives;
+
+        public Cat() {
+        }
+
+        public Cat(final String name) {
+            this.name = name;
+        }
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/ItemWithIdentity.java

@@ -0,0 +1,21 @@
+package com.baeldung.jackson.annotation.bidirection;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
+public class ItemWithIdentity {
+    public int id;
+    public String itemName;
+    public UserWithIdentity owner;
+
+    public ItemWithIdentity() {
+        super();
+    }
+
+    public ItemWithIdentity(final int id, final String itemName, final UserWithIdentity owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/ItemWithIgnore.java

@@ -0,0 +1,17 @@
+package com.baeldung.jackson.annotation.bidirection;
+
+public class ItemWithIgnore {
+    public int id;
+    public String itemName;
+    public UserWithIgnore owner;
+
+    public ItemWithIgnore() {
+        super();
+    }
+
+    public ItemWithIgnore(final int id, final String itemName, final UserWithIgnore owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/ItemWithRef.java

@@ -0,0 +1,21 @@
+package com.baeldung.jackson.annotation.bidirection;
+
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+
+public class ItemWithRef {
+    public int id;
+    public String itemName;
+
+    @JsonManagedReference
+    public UserWithRef owner;
+
+    public ItemWithRef() {
+        super();
+    }
+
+    public ItemWithRef(final int id, final String itemName, final UserWithRef owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/UserWithIdentity.java

@@ -0,0 +1,28 @@
+package com.baeldung.jackson.annotation.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
+public class UserWithIdentity {
+    public int id;
+    public String name;
+    public List<ItemWithIdentity> userItems;
+
+    public UserWithIdentity() {
+        super();
+    }
+
+    public UserWithIdentity(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithIdentity>();
+    }
+
+    public void addItem(final ItemWithIdentity item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/UserWithIgnore.java

@@ -0,0 +1,28 @@
+package com.baeldung.jackson.annotation.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+
+public class UserWithIgnore {
+    public int id;
+    public String name;
+
+    @JsonIgnore
+    public List<ItemWithIgnore> userItems;
+
+    public UserWithIgnore() {
+        super();
+    }
+
+    public UserWithIgnore(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithIgnore>();
+    }
+
+    public void addItem(final ItemWithIgnore item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/UserWithRef.java

@@ -0,0 +1,28 @@
+package com.baeldung.jackson.annotation.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonBackReference;
+
+public class UserWithRef {
+    public int id;
+    public String name;
+
+    @JsonBackReference
+    public List<ItemWithRef> userItems;
+
+    public UserWithRef() {
+        super();
+    }
+
+    public UserWithRef(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithRef>();
+    }
+
+    public void addItem(final ItemWithRef item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/CustomDateDeserializer.java

@@ -0,0 +1,36 @@
+package com.baeldung.jackson.annotation.date;
+
+import java.io.IOException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+public class CustomDateDeserializer extends StdDeserializer<Date> {
+
+    private static final long serialVersionUID = -5451717385630622729L;
+    private SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss");
+
+    public CustomDateDeserializer() {
+        this(null);
+    }
+
+    public CustomDateDeserializer(final Class<?> vc) {
+        super(vc);
+    }
+
+    @Override
+    public Date deserialize(final JsonParser jsonparser, final DeserializationContext context) throws IOException, JsonProcessingException {
+        final String date = jsonparser.getText();
+        try {
+            return formatter.parse(date);
+        } catch (final ParseException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/CustomDateSerializer.java

@@ -0,0 +1,29 @@
+package com.baeldung.jackson.annotation.date;
+
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class CustomDateSerializer extends StdSerializer<Date> {
+
+    private static final long serialVersionUID = -2894356342227378312L;
+    private SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss");
+
+    public CustomDateSerializer() {
+        this(null);
+    }
+
+    public CustomDateSerializer(final Class<Date> t) {
+        super(t);
+    }
+
+    @Override
+    public void serialize(final Date value, final JsonGenerator gen, final SerializerProvider arg2) throws IOException, JsonProcessingException {
+        gen.writeString(formatter.format(value));
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/EventWithFormat.java

@@ -0,0 +1,29 @@
+package com.baeldung.jackson.annotation.date;
+
+import java.util.Date;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+public class EventWithFormat {
+    public String name;
+
+    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy hh:mm:ss")
+    public Date eventDate;
+
+    public EventWithFormat() {
+        super();
+    }
+
+    public EventWithFormat(final String name, final Date eventDate) {
+        this.name = name;
+        this.eventDate = eventDate;
+    }
+
+    public Date getEventDate() {
+        return eventDate;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/EventWithSerializer.java

@@ -0,0 +1,31 @@
+package com.baeldung.jackson.annotation.date;
+
+import java.util.Date;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+
+public class EventWithSerializer {
+    public String name;
+
+    @JsonDeserialize(using = CustomDateDeserializer.class)
+    @JsonSerialize(using = CustomDateSerializer.class)
+    public Date eventDate;
+
+    public EventWithSerializer() {
+        super();
+    }
+
+    public EventWithSerializer(final String name, final Date eventDate) {
+        this.name = name;
+        this.eventDate = eventDate;
+    }
+
+    public Date getEventDate() {
+        return eventDate;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/deserialization/ItemDeserializerOnClass.java

@@ -0,0 +1,41 @@
+package com.baeldung.jackson.annotation.deserialization;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.annotation.dtos.ItemWithSerializer;
+import com.baeldung.jackson.annotation.dtos.User;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+import com.fasterxml.jackson.databind.node.IntNode;
+
+public class ItemDeserializerOnClass extends StdDeserializer<ItemWithSerializer> {
+
+    private static final long serialVersionUID = 5579141241817332594L;
+
+    public ItemDeserializerOnClass() {
+        this(null);
+    }
+
+    public ItemDeserializerOnClass(final Class<?> vc) {
+        super(vc);
+    }
+
+    /**
+     * {"id":1,"itemNr":"theItem","owner":2}
+     */
+    @Override
+    public ItemWithSerializer deserialize(final JsonParser jp, final DeserializationContext ctxt) throws IOException, JsonProcessingException {
+        final JsonNode node = jp.getCodec()
+            .readTree(jp);
+        final int id = (Integer) ((IntNode) node.get("id")).numberValue();
+        final String itemName = node.get("itemName")
+            .asText();
+        final int userId = (Integer) ((IntNode) node.get("owner")).numberValue();
+
+        return new ItemWithSerializer(id, itemName, new User(userId, null));
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/Item.java

@@ -0,0 +1,32 @@
+package com.baeldung.jackson.annotation.dtos;
+
+public class Item {
+    public int id;
+    public String itemName;
+    public User owner;
+
+    public Item() {
+        super();
+    }
+
+    public Item(final int id, final String itemName, final User owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+
+    // API
+
+    public int getId() {
+        return id;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+
+    public User getOwner() {
+        return owner;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/ItemWithSerializer.java

@@ -0,0 +1,36 @@
+package com.baeldung.jackson.annotation.dtos;
+
+import com.baeldung.jackson.annotation.deserialization.ItemDeserializerOnClass;
+import com.baeldung.jackson.annotation.serialization.ItemSerializerOnClass;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+
+@JsonSerialize(using = ItemSerializerOnClass.class)
+@JsonDeserialize(using = ItemDeserializerOnClass.class)
+public class ItemWithSerializer {
+    public final int id;
+    public final String itemName;
+    public final User owner;
+
+    public ItemWithSerializer(final int id, final String itemName, final User owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+
+    // API
+
+    public int getId() {
+        return id;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+
+    public User getOwner() {
+        return owner;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/User.java

@@ -0,0 +1,26 @@
+package com.baeldung.jackson.annotation.dtos;
+
+public class User {
+    public int id;
+    public String name;
+
+    public User() {
+        super();
+    }
+
+    public User(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    // API
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/withEnum/DistanceEnumWithValue.java

@@ -0,0 +1,29 @@
+package com.baeldung.jackson.annotation.dtos.withEnum;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+
+public enum DistanceEnumWithValue {
+    KILOMETER("km", 1000), MILE("miles", 1609.34), METER("meters", 1), INCH("inches", 0.0254), CENTIMETER("cm", 0.01), MILLIMETER("mm", 0.001);
+
+    private String unit;
+    private final double meters;
+
+    private DistanceEnumWithValue(String unit, double meters) {
+        this.unit = unit;
+        this.meters = meters;
+    }
+
+    @JsonValue
+    public double getMeters() {
+        return meters;
+    }
+
+    public String getUnit() {
+        return unit;
+    }
+
+    public void setUnit(String unit) {
+        this.unit = unit;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/exception/UserWithRoot.java

@@ -0,0 +1,18 @@
+package com.baeldung.jackson.annotation.exception;
+
+import com.fasterxml.jackson.annotation.JsonRootName;
+
+@JsonRootName(value = "user")
+public class UserWithRoot {
+    public int id;
+    public String name;
+
+    public UserWithRoot() {
+        super();
+    }
+
+    public UserWithRoot(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/exception/UserWithRootNamespace.java

@@ -0,0 +1,18 @@
+package com.baeldung.jackson.annotation.exception;
+
+import com.fasterxml.jackson.annotation.JsonRootName;
+
+@JsonRootName(value = "user", namespace="users")
+public class UserWithRootNamespace {
+    public int id;
+    public String name;
+
+    public UserWithRootNamespace() {
+        super();
+    }
+
+    public UserWithRootNamespace(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/jsonview/Item.java

@@ -0,0 +1,36 @@
+package com.baeldung.jackson.annotation.jsonview;
+
+import com.fasterxml.jackson.annotation.JsonView;
+
+public class Item {
+    @JsonView(Views.Public.class)
+    public int id;
+
+    @JsonView(Views.Public.class)
+    public String itemName;
+
+    @JsonView(Views.Internal.class)
+    public String ownerName;
+
+    public Item() {
+        super();
+    }
+
+    public Item(final int id, final String itemName, final String ownerName) {
+        this.id = id;
+        this.itemName = itemName;
+        this.ownerName = ownerName;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+
+    public String getOwnerName() {
+        return ownerName;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/jsonview/Views.java

@@ -0,0 +1,9 @@
+package com.baeldung.jackson.annotation.jsonview;
+
+public class Views {
+    public static class Public {
+    }
+
+    public static class Internal extends Public {
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/serialization/ItemSerializer.java

@@ -0,0 +1,32 @@
+package com.baeldung.jackson.annotation.serialization;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.annotation.dtos.Item;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class ItemSerializer extends StdSerializer<Item> {
+
+    private static final long serialVersionUID = 6739170890621978901L;
+
+    public ItemSerializer() {
+        this(null);
+    }
+
+    public ItemSerializer(final Class<Item> t) {
+        super(t);
+    }
+
+    @Override
+    public final void serialize(final Item value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
+        jgen.writeStartObject();
+        jgen.writeNumberField("id", value.id);
+        jgen.writeStringField("itemName", value.itemName);
+        jgen.writeNumberField("owner", value.owner.id);
+        jgen.writeEndObject();
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/serialization/ItemSerializerOnClass.java

@@ -0,0 +1,32 @@
+package com.baeldung.jackson.annotation.serialization;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.annotation.dtos.ItemWithSerializer;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class ItemSerializerOnClass extends StdSerializer<ItemWithSerializer> {
+
+    private static final long serialVersionUID = -1760959597313610409L;
+
+    public ItemSerializerOnClass() {
+        this(null);
+    }
+
+    public ItemSerializerOnClass(final Class<ItemWithSerializer> t) {
+        super(t);
+    }
+
+    @Override
+    public final void serialize(final ItemWithSerializer value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
+        jgen.writeStartObject();
+        jgen.writeNumberField("id", value.id);
+        jgen.writeStringField("itemName", value.itemName);
+        jgen.writeNumberField("owner", value.owner.id);
+        jgen.writeEndObject();
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/CustomListDeserializer.java

@@ -0,0 +1,29 @@
+package com.baeldung.jackson.bidirection;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+
+public class CustomListDeserializer extends StdDeserializer<List<ItemWithSerializer>> {
+
+    private static final long serialVersionUID = 1095767961632979804L;
+
+    public CustomListDeserializer() {
+        this(null);
+    }
+
+    public CustomListDeserializer(final Class<?> vc) {
+        super(vc);
+    }
+
+    @Override
+    public List<ItemWithSerializer> deserialize(final JsonParser jsonparser, final DeserializationContext context) throws IOException, JsonProcessingException {
+        return new ArrayList<ItemWithSerializer>();
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/CustomListSerializer.java

@@ -0,0 +1,32 @@
+package com.baeldung.jackson.bidirection;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class CustomListSerializer extends StdSerializer<List<ItemWithSerializer>> {
+
+    private static final long serialVersionUID = 3698763098000900856L;
+
+    public CustomListSerializer() {
+        this(null);
+    }
+
+    public CustomListSerializer(final Class<List<ItemWithSerializer>> t) {
+        super(t);
+    }
+
+    @Override
+    public void serialize(final List<ItemWithSerializer> items, final JsonGenerator generator, final SerializerProvider provider) throws IOException, JsonProcessingException {
+        final List<Integer> ids = new ArrayList<Integer>();
+        for (final ItemWithSerializer item : items) {
+            ids.add(item.id);
+        }
+        generator.writeObject(ids);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/Item.java

@@ -0,0 +1,17 @@
+package com.baeldung.jackson.bidirection;
+
+public class Item {
+    public int id;
+    public String itemName;
+    public User owner;
+
+    public Item() {
+        super();
+    }
+
+    public Item(final int id, final String itemName, final User owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/ItemWithIdentity.java

@@ -0,0 +1,21 @@
+package com.baeldung.jackson.bidirection;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
+public class ItemWithIdentity {
+    public int id;
+    public String itemName;
+    public UserWithIdentity owner;
+
+    public ItemWithIdentity() {
+        super();
+    }
+
+    public ItemWithIdentity(final int id, final String itemName, final UserWithIdentity owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/ItemWithIgnore.java

@@ -0,0 +1,17 @@
+package com.baeldung.jackson.bidirection;
+
+public class ItemWithIgnore {
+    public int id;
+    public String itemName;
+    public UserWithIgnore owner;
+
+    public ItemWithIgnore() {
+        super();
+    }
+
+    public ItemWithIgnore(final int id, final String itemName, final UserWithIgnore owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/ItemWithRef.java

@@ -0,0 +1,21 @@
+package com.baeldung.jackson.bidirection;
+
+import com.fasterxml.jackson.annotation.JsonManagedReference;
+
+public class ItemWithRef {
+    public int id;
+    public String itemName;
+
+    @JsonManagedReference
+    public UserWithRef owner;
+
+    public ItemWithRef() {
+        super();
+    }
+
+    public ItemWithRef(final int id, final String itemName, final UserWithRef owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/ItemWithSerializer.java

@@ -0,0 +1,17 @@
+package com.baeldung.jackson.bidirection;
+
+public class ItemWithSerializer {
+    public int id;
+    public String itemName;
+    public UserWithSerializer owner;
+
+    public ItemWithSerializer() {
+        super();
+    }
+
+    public ItemWithSerializer(final int id, final String itemName, final UserWithSerializer owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/ItemWithView.java

@@ -0,0 +1,26 @@
+package com.baeldung.jackson.bidirection;
+
+import com.baeldung.jackson.bidirection.jsonview.Views;
+
+import com.fasterxml.jackson.annotation.JsonView;
+
+public class ItemWithView {
+    @JsonView(Views.Public.class)
+    public int id;
+
+    @JsonView(Views.Public.class)
+    public String itemName;
+
+    @JsonView(Views.Public.class)
+    public UserWithView owner;
+
+    public ItemWithView() {
+        super();
+    }
+
+    public ItemWithView(final int id, final String itemName, final UserWithView owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/User.java

@@ -0,0 +1,24 @@
+package com.baeldung.jackson.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class User {
+    public int id;
+    public String name;
+    public List<Item> userItems;
+
+    public User() {
+        super();
+    }
+
+    public User(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<Item>();
+    }
+
+    public void addItem(final Item item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/UserWithIdentity.java

@@ -0,0 +1,28 @@
+package com.baeldung.jackson.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
+public class UserWithIdentity {
+    public int id;
+    public String name;
+    public List<ItemWithIdentity> userItems;
+
+    public UserWithIdentity() {
+        super();
+    }
+
+    public UserWithIdentity(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithIdentity>();
+    }
+
+    public void addItem(final ItemWithIdentity item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/UserWithIgnore.java

@@ -0,0 +1,28 @@
+package com.baeldung.jackson.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+
+public class UserWithIgnore {
+    public int id;
+    public String name;
+
+    @JsonIgnore
+    public List<ItemWithIgnore> userItems;
+
+    public UserWithIgnore() {
+        super();
+    }
+
+    public UserWithIgnore(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithIgnore>();
+    }
+
+    public void addItem(final ItemWithIgnore item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/UserWithRef.java

@@ -0,0 +1,28 @@
+package com.baeldung.jackson.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonBackReference;
+
+public class UserWithRef {
+    public int id;
+    public String name;
+
+    @JsonBackReference
+    public List<ItemWithRef> userItems;
+
+    public UserWithRef() {
+        super();
+    }
+
+    public UserWithRef(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithRef>();
+    }
+
+    public void addItem(final ItemWithRef item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/UserWithSerializer.java

@@ -0,0 +1,30 @@
+package com.baeldung.jackson.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+
+public class UserWithSerializer {
+    public int id;
+    public String name;
+
+    @JsonSerialize(using = CustomListSerializer.class)
+    @JsonDeserialize(using = CustomListDeserializer.class)
+    public List<ItemWithSerializer> userItems;
+
+    public UserWithSerializer() {
+        super();
+    }
+
+    public UserWithSerializer(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithSerializer>();
+    }
+
+    public void addItem(final ItemWithSerializer item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/UserWithView.java

@@ -0,0 +1,33 @@
+package com.baeldung.jackson.bidirection;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.baeldung.jackson.bidirection.jsonview.Views;
+
+import com.fasterxml.jackson.annotation.JsonView;
+
+public class UserWithView {
+    @JsonView(Views.Public.class)
+    public int id;
+
+    @JsonView(Views.Public.class)
+    public String name;
+
+    @JsonView(Views.Internal.class)
+    public List<ItemWithView> userItems;
+
+    public UserWithView() {
+        super();
+    }
+
+    public UserWithView(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+        userItems = new ArrayList<ItemWithView>();
+    }
+
+    public void addItem(final ItemWithView item) {
+        userItems.add(item);
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/jsonview/Views.java

@@ -0,0 +1,9 @@
+package com.baeldung.jackson.bidirection.jsonview;
+
+public class Views {
+    public static class Public {
+    }
+
+    public static class Internal extends Public {
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/domain/Person.java

@@ -0,0 +1,30 @@
+package com.baeldung.jackson.domain;
+
+public class Person {
+
+    private String firstName;
+    private String lastName;
+    
+    public Person(String firstName, String lastName) {
+        super();
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+}
+

jackson-annotations/src/main/java/com/baeldung/jackson/format/User.java

@@ -0,0 +1,37 @@
+package com.baeldung.jackson.format;
+
+import java.util.Date;
+
+import com.baeldung.jackson.domain.Person;
+import com.fasterxml.jackson.annotation.JsonFormat;
+
+/**
+ * @author Jay Sridhar
+ * @version 1.0
+ */
+public class User extends Person {
+    private String firstName;
+    private String lastName;
+
+    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd@HH:mm:ss.SSSZ")
+    private Date createdDate;
+
+    public User(String firstName, String lastName) {
+        super(firstName, lastName);
+        this.createdDate = new Date();
+    }
+
+    public Date getCreatedDate() {
+        return createdDate;
+    }
+
+    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd@HH:mm:ss.SSSZ", locale = "en_GB")
+    public Date getCurrentDate() {
+        return new Date();
+    }
+
+    @JsonFormat(shape = JsonFormat.Shape.NUMBER)
+    public Date getDateNum() {
+        return new Date();
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/AdvancedAnnotationsUnitTest.java

@@ -0,0 +1,133 @@
+package com.baeldung.jackson.advancedannotations;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.instanceOf;
+import static org.hamcrest.CoreMatchers.not;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.baeldung.jackson.advancedannotations.AppendBeans.BeanWithAppend;
+import com.baeldung.jackson.advancedannotations.AppendBeans.BeanWithoutAppend;
+import com.baeldung.jackson.advancedannotations.IdentityReferenceBeans.BeanWithIdentityReference;
+import com.baeldung.jackson.advancedannotations.IdentityReferenceBeans.BeanWithoutIdentityReference;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectMapper.DefaultTyping;
+import com.fasterxml.jackson.databind.ObjectWriter;
+import com.fasterxml.jackson.module.jsonSchema.JsonSchema;
+import com.fasterxml.jackson.module.jsonSchema.factories.SchemaFactoryWrapper;
+
+public class AdvancedAnnotationsUnitTest {
+    @Test
+    public void whenNotUsingJsonIdentityReferenceAnnotation_thenCorrect() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        BeanWithoutIdentityReference bean = new BeanWithoutIdentityReference(1, "Bean Without Identity Reference Annotation");
+        String jsonString = mapper.writeValueAsString(bean);
+
+        assertThat(jsonString, containsString("Bean Without Identity Reference Annotation"));
+    }
+
+    @Test
+    public void whenUsingJsonIdentityReferenceAnnotation_thenCorrect() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        BeanWithIdentityReference bean = new BeanWithIdentityReference(1, "Bean With Identity Reference Annotation");
+        String jsonString = mapper.writeValueAsString(bean);
+
+        assertEquals("1", jsonString);
+    }
+
+    @Test
+    public void whenNotUsingJsonAppendAnnotation_thenCorrect() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+
+        BeanWithoutAppend bean = new BeanWithoutAppend(2, "Bean Without Append Annotation");
+        ObjectWriter writer = mapper.writerFor(BeanWithoutAppend.class)
+            .withAttribute("version", "1.0");
+        String jsonString = writer.writeValueAsString(bean);
+
+        assertThat(jsonString, not(containsString("version")));
+        assertThat(jsonString, not(containsString("1.0")));
+    }
+
+    @Test
+    public void whenUsingJsonAppendAnnotation_thenCorrect() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+
+        BeanWithAppend bean = new BeanWithAppend(2, "Bean With Append Annotation");
+        ObjectWriter writer = mapper.writerFor(BeanWithAppend.class)
+            .withAttribute("version", "1.0");
+        String jsonString = writer.writeValueAsString(bean);
+
+        assertThat(jsonString, containsString("version"));
+        assertThat(jsonString, containsString("1.0"));
+    }
+
+    @Test
+    public void whenUsingJsonNamingAnnotation_thenCorrect() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        NamingBean bean = new NamingBean(3, "Naming Bean");
+        String jsonString = mapper.writeValueAsString(bean);
+
+        assertThat(jsonString, containsString("bean_name"));
+    }
+
+    @Test
+    public void whenUsingJsonPropertyDescriptionAnnotation_thenCorrect() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        SchemaFactoryWrapper wrapper = new SchemaFactoryWrapper();
+        mapper.acceptJsonFormatVisitor(PropertyDescriptionBean.class, wrapper);
+        JsonSchema jsonSchema = wrapper.finalSchema();
+        String jsonString = mapper.writeValueAsString(jsonSchema);
+        System.out.println(jsonString);
+        assertThat(jsonString, containsString("This is a description of the name property"));
+    }
+
+    @Test
+    public void whenUsingJsonPOJOBuilderAnnotation_thenCorrect() throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        String jsonString = "{\"id\":5,\"name\":\"POJO Builder Bean\"}";
+        POJOBuilderBean bean = mapper.readValue(jsonString, POJOBuilderBean.class);
+
+        assertEquals(5, bean.getIdentity());
+        assertEquals("POJO Builder Bean", bean.getBeanName());
+    }
+
+    @Test
+    public void whenUsingJsonTypeIdAnnotation_thenCorrect() throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper();
+        mapper.enableDefaultTyping(DefaultTyping.NON_FINAL);
+        TypeIdBean bean = new TypeIdBean(6, "Type Id Bean");
+        String jsonString = mapper.writeValueAsString(bean);
+
+        assertThat(jsonString, containsString("Type Id Bean"));
+    }
+
+    @Test
+    public void whenUsingJsonTypeIdResolverAnnotation_thenCorrect() throws IOException {
+        TypeIdResolverStructure.FirstBean bean1 = new TypeIdResolverStructure.FirstBean(1, "Bean 1");
+        TypeIdResolverStructure.LastBean bean2 = new TypeIdResolverStructure.LastBean(2, "Bean 2");
+
+        List<TypeIdResolverStructure.AbstractBean> beans = new ArrayList<>();
+        beans.add(bean1);
+        beans.add(bean2);
+
+        TypeIdResolverStructure.BeanContainer serializedContainer = new TypeIdResolverStructure.BeanContainer();
+        serializedContainer.setBeans(beans);
+
+        ObjectMapper mapper = new ObjectMapper();
+        String jsonString = mapper.writeValueAsString(serializedContainer);
+        assertThat(jsonString, containsString("bean1"));
+        assertThat(jsonString, containsString("bean2"));
+
+        TypeIdResolverStructure.BeanContainer deserializedContainer = mapper.readValue(jsonString, TypeIdResolverStructure.BeanContainer.class);
+        List<TypeIdResolverStructure.AbstractBean> beanList = deserializedContainer.getBeans();
+        assertThat(beanList.get(0), instanceOf(TypeIdResolverStructure.FirstBean.class));
+        assertThat(beanList.get(1), instanceOf(TypeIdResolverStructure.LastBean.class));
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/AppendBeans.java

@@ -0,0 +1,58 @@
+package com.baeldung.jackson.advancedannotations;
+
+import com.fasterxml.jackson.databind.annotation.JsonAppend;
+
+public class AppendBeans {
+    public static class BeanWithoutAppend {
+        private int id;
+        private String name;
+
+        public BeanWithoutAppend(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+
+        public int getId() {
+            return id;
+        }
+
+        public void setId(int id) {
+            this.id = id;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+    }
+
+    @JsonAppend(attrs = { @JsonAppend.Attr(value = "version") })
+    public static class BeanWithAppend {
+        private int id;
+        private String name;
+
+        public BeanWithAppend(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+
+        public int getId() {
+            return id;
+        }
+
+        public void setId(int id) {
+            this.id = id;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/IdentityReferenceBeans.java

@@ -0,0 +1,62 @@
+package com.baeldung.jackson.advancedannotations;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+public class IdentityReferenceBeans {
+    @JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
+    public static class BeanWithoutIdentityReference {
+        private int id;
+        private String name;
+
+        public BeanWithoutIdentityReference(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+
+        public int getId() {
+            return id;
+        }
+
+        public void setId(int id) {
+            this.id = id;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+    }
+
+    @JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
+    @JsonIdentityReference(alwaysAsId = true)
+    public static class BeanWithIdentityReference {
+        private int id;
+        private String name;
+
+        public BeanWithIdentityReference(int id, String name) {
+            this.id = id;
+            this.name = name;
+        }
+
+        public int getId() {
+            return id;
+        }
+
+        public void setId(int id) {
+            this.id = id;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/NamingBean.java

@@ -0,0 +1,31 @@
+package com.baeldung.jackson.advancedannotations;
+
+import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+@JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)
+public class NamingBean {
+    private int id;
+    private String beanName;
+
+    public NamingBean(int id, String beanName) {
+        this.id = id;
+        this.beanName = beanName;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getBeanName() {
+        return beanName;
+    }
+
+    public void setBeanName(String beanName) {
+        this.beanName = beanName;
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/POJOBuilderBean.java

@@ -0,0 +1,51 @@
+package com.baeldung.jackson.advancedannotations;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
+
+@JsonDeserialize(builder = POJOBuilderBean.BeanBuilder.class)
+public class POJOBuilderBean {
+    private int identity;
+    private String beanName;
+
+    @JsonPOJOBuilder(buildMethodName = "createBean", withPrefix = "construct")
+    public static class BeanBuilder {
+        private int idValue;
+        private String nameValue;
+
+        public BeanBuilder constructId(int id) {
+            idValue = id;
+            return this;
+        }
+
+        public BeanBuilder constructName(String name) {
+            nameValue = name;
+            return this;
+        }
+
+        public POJOBuilderBean createBean() {
+            return new POJOBuilderBean(idValue, nameValue);
+        }
+    }
+
+    public POJOBuilderBean(int identity, String beanName) {
+        this.identity = identity;
+        this.beanName = beanName;
+    }
+
+    public int getIdentity() {
+        return identity;
+    }
+
+    public void setIdentity(int identity) {
+        this.identity = identity;
+    }
+
+    public String getBeanName() {
+        return beanName;
+    }
+
+    public void setBeanName(String beanName) {
+        this.beanName = beanName;
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/PropertyDescriptionBean.java

@@ -0,0 +1,25 @@
+package com.baeldung.jackson.advancedannotations;
+
+import com.fasterxml.jackson.annotation.JsonPropertyDescription;
+
+public class PropertyDescriptionBean {
+    private int id;
+    @JsonPropertyDescription("This is a description of the name property")
+    private String name;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/TypeIdBean.java

@@ -0,0 +1,30 @@
+package com.baeldung.jackson.advancedannotations;
+
+import com.fasterxml.jackson.annotation.JsonTypeId;
+
+public class TypeIdBean {
+    private int id;
+    @JsonTypeId
+    private String name;
+
+    public TypeIdBean(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/TypeIdResolverStructure.java

@@ -0,0 +1,130 @@
+package com.baeldung.jackson.advancedannotations;
+
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeInfo.Id;
+import com.fasterxml.jackson.databind.DatabindContext;
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.annotation.JsonTypeIdResolver;
+import com.fasterxml.jackson.databind.jsontype.impl.TypeIdResolverBase;
+
+public class TypeIdResolverStructure {
+    public static class BeanContainer {
+        private List<AbstractBean> beans;
+
+        public List<AbstractBean> getBeans() {
+            return beans;
+        }
+
+        public void setBeans(List<AbstractBean> beans) {
+            this.beans = beans;
+        }
+    }
+
+    @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@type")
+    @JsonTypeIdResolver(BeanIdResolver.class)
+    public static class AbstractBean {
+        private int id;
+
+        protected AbstractBean() {
+        }
+
+        protected AbstractBean(int id) {
+            this.id = id;
+        }
+
+        public int getId() {
+            return id;
+        }
+
+        public void setId(int id) {
+            this.id = id;
+        }
+    }
+
+    public static class FirstBean extends AbstractBean {
+        String firstName;
+
+        public FirstBean() {
+        }
+
+        public FirstBean(int id, String name) {
+            super(id);
+            setFirstName(name);
+        }
+
+        public String getFirstName() {
+            return firstName;
+        }
+
+        public void setFirstName(String name) {
+            firstName = name;
+        }
+    }
+
+    public static class LastBean extends AbstractBean {
+        String lastName;
+
+        public LastBean() {
+        }
+
+        public LastBean(int id, String name) {
+            super(id);
+            setLastName(name);
+        }
+
+        public String getLastName() {
+            return lastName;
+        }
+
+        public void setLastName(String name) {
+            lastName = name;
+        }
+    }
+
+    public static class BeanIdResolver extends TypeIdResolverBase {
+        private JavaType superType;
+
+        @Override
+        public void init(JavaType baseType) {
+            superType = baseType;
+        }
+
+        @Override
+        public Id getMechanism() {
+            return Id.NAME;
+        }
+
+        @Override
+        public String idFromValue(Object obj) {
+            return idFromValueAndType(obj, obj.getClass());
+        }
+
+        @Override
+        public String idFromValueAndType(Object obj, Class<?> subType) {
+            String typeId = null;
+            switch (subType.getSimpleName()) {
+            case "FirstBean":
+                typeId = "bean1";
+                break;
+            case "LastBean":
+                typeId = "bean2";
+            }
+            return typeId;
+        }
+
+        @Override
+        public JavaType typeFromId(DatabindContext context, String id) {
+            Class<?> subType = null;
+            switch (id) {
+            case "bean1":
+                subType = FirstBean.class;
+                break;
+            case "bean2":
+                subType = LastBean.class;
+            }
+            return context.constructSpecializedType(superType, subType);
+        }
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/annotation/JacksonAnnotationUnitTest.java

@@ -0,0 +1,405 @@
+package com.baeldung.jackson.annotation;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.TimeZone;
+
+import org.junit.Test;
+
+import com.baeldung.jackson.annotation.bidirection.ItemWithIdentity;
+import com.baeldung.jackson.annotation.bidirection.ItemWithRef;
+import com.baeldung.jackson.annotation.bidirection.UserWithIdentity;
+import com.baeldung.jackson.annotation.bidirection.UserWithRef;
+import com.baeldung.jackson.annotation.date.EventWithFormat;
+import com.baeldung.jackson.annotation.date.EventWithSerializer;
+import com.baeldung.jackson.ignore.dtos.MyMixInForIgnoreType;
+import com.baeldung.jackson.annotation.dtos.withEnum.DistanceEnumWithValue;
+import com.baeldung.jackson.annotation.exception.UserWithRoot;
+import com.baeldung.jackson.annotation.exception.UserWithRootNamespace;
+import com.baeldung.jackson.annotation.jsonview.Item;
+import com.baeldung.jackson.annotation.jsonview.Views;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.InjectableValues;
+import com.fasterxml.jackson.databind.MapperFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.databind.ser.FilterProvider;
+import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
+import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+
+public class JacksonAnnotationUnitTest {
+
+    @Test
+    public void whenSerializingUsingJsonAnyGetter_thenCorrect() throws JsonProcessingException {
+        final ExtendableBean bean = new ExtendableBean("My bean");
+        bean.add("attr1", "val1");
+        bean.add("attr2", "val2");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("attr1"));
+        assertThat(result, containsString("val1"));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonGetter_thenCorrect() throws JsonProcessingException {
+        final BeanWithGetter bean = new BeanWithGetter(1, "My bean");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("My bean"));
+        assertThat(result, containsString("1"));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonPropertyOrder_thenCorrect() throws JsonProcessingException {
+        final MyBean bean = new MyBean(1, "My bean");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("My bean"));
+        assertThat(result, containsString("1"));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonRawValue_thenCorrect() throws JsonProcessingException {
+        final RawBean bean = new RawBean("My bean", "{\"attr\":false}");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("My bean"));
+        assertThat(result, containsString("{\"attr\":false}"));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonRootName_thenCorrect() throws JsonProcessingException {
+        final UserWithRoot user = new UserWithRoot(1, "John");
+
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.enable(SerializationFeature.WRAP_ROOT_VALUE);
+        final String result = mapper.writeValueAsString(user);
+
+        assertThat(result, containsString("John"));
+        assertThat(result, containsString("user"));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonValue_thenCorrect() throws IOException {
+        final String enumAsString = new ObjectMapper().writeValueAsString(DistanceEnumWithValue.MILE);
+
+        assertThat(enumAsString, is("1609.34"));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonSerialize_thenCorrect() throws JsonProcessingException, ParseException {
+        final SimpleDateFormat df = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss");
+
+        final String toParse = "20-12-2014 02:30:00";
+        final Date date = df.parse(toParse);
+        final EventWithSerializer event = new EventWithSerializer("party", date);
+
+        final String result = new ObjectMapper().writeValueAsString(event);
+        assertThat(result, containsString(toParse));
+    }
+
+    // ========================= Deserializing annotations ============================
+
+    @Test
+    public void whenDeserializingUsingJsonCreator_thenCorrect() throws IOException {
+        final String json = "{\"id\":1,\"theName\":\"My bean\"}";
+
+        final BeanWithCreator bean = new ObjectMapper().readerFor(BeanWithCreator.class)
+            .readValue(json);
+        assertEquals("My bean", bean.name);
+    }
+
+    @Test
+    public void whenDeserializingUsingJsonInject_thenCorrect() throws IOException {
+        final String json = "{\"name\":\"My bean\"}";
+        final InjectableValues inject = new InjectableValues.Std().addValue(int.class, 1);
+
+        final BeanWithInject bean = new ObjectMapper().reader(inject)
+            .forType(BeanWithInject.class)
+            .readValue(json);
+        assertEquals("My bean", bean.name);
+        assertEquals(1, bean.id);
+    }
+
+    @Test
+    public void whenDeserializingUsingJsonAnySetter_thenCorrect() throws IOException {
+        final String json = "{\"name\":\"My bean\",\"attr2\":\"val2\",\"attr1\":\"val1\"}";
+
+        final ExtendableBean bean = new ObjectMapper().readerFor(ExtendableBean.class)
+            .readValue(json);
+        assertEquals("My bean", bean.name);
+        assertEquals("val2", bean.getProperties()
+            .get("attr2"));
+    }
+
+    @Test
+    public void whenDeserializingUsingJsonSetter_thenCorrect() throws IOException {
+        final String json = "{\"id\":1,\"name\":\"My bean\"}";
+
+        final BeanWithGetter bean = new ObjectMapper().readerFor(BeanWithGetter.class)
+            .readValue(json);
+        assertEquals("My bean", bean.getTheName());
+    }
+
+    @Test
+    public void whenDeserializingUsingJsonDeserialize_thenCorrect() throws IOException {
+        final String json = "{\"name\":\"party\",\"eventDate\":\"20-12-2014 02:30:00\"}";
+
+        final SimpleDateFormat df = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss");
+
+        final EventWithSerializer event = new ObjectMapper().readerFor(EventWithSerializer.class)
+            .readValue(json);
+        assertEquals("20-12-2014 02:30:00", df.format(event.eventDate));
+    }
+
+    // ========================= Inclusion annotations ============================
+
+    @Test
+    public void whenSerializingUsingJsonIgnoreProperties_thenCorrect() throws JsonProcessingException {
+        final BeanWithIgnore bean = new BeanWithIgnore(1, "My bean");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("My bean"));
+        assertThat(result, not(containsString("id")));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonIgnore_thenCorrect() throws JsonProcessingException {
+        final BeanWithIgnore bean = new BeanWithIgnore(1, "My bean");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("My bean"));
+        assertThat(result, not(containsString("id")));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonIgnoreType_thenCorrect() throws JsonProcessingException, ParseException {
+        final UserWithIgnoreType.Name name = new UserWithIgnoreType.Name("John", "Doe");
+        final UserWithIgnoreType user = new UserWithIgnoreType(1, name);
+
+        final String result = new ObjectMapper().writeValueAsString(user);
+
+        assertThat(result, containsString("1"));
+        assertThat(result, not(containsString("name")));
+        assertThat(result, not(containsString("John")));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonInclude_thenCorrect() throws JsonProcessingException {
+        final MyBean bean = new MyBean(1, null);
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("1"));
+        assertThat(result, not(containsString("name")));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonAutoDetect_thenCorrect() throws JsonProcessingException {
+        final PrivateBean bean = new PrivateBean(1, "My bean");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("1"));
+        assertThat(result, containsString("My bean"));
+    }
+
+    // ========================= Polymorphic annotations ============================
+
+    @Test
+    public void whenSerializingPolymorphic_thenCorrect() throws JsonProcessingException {
+        final Zoo.Dog dog = new Zoo.Dog("lacy");
+        final Zoo zoo = new Zoo(dog);
+
+        final String result = new ObjectMapper().writeValueAsString(zoo);
+
+        assertThat(result, containsString("type"));
+        assertThat(result, containsString("dog"));
+    }
+
+    @Test
+    public void whenDeserializingPolymorphic_thenCorrect() throws IOException {
+        final String json = "{\"animal\":{\"name\":\"lacy\",\"type\":\"cat\"}}";
+
+        final Zoo zoo = new ObjectMapper().readerFor(Zoo.class)
+            .readValue(json);
+
+        assertEquals("lacy", zoo.animal.name);
+        assertEquals(Zoo.Cat.class, zoo.animal.getClass());
+    }
+    // ========================= General annotations ============================
+
+    @Test
+    public void whenUsingJsonProperty_thenCorrect() throws IOException {
+        final BeanWithGetter bean = new BeanWithGetter(1, "My bean");
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+        assertThat(result, containsString("My bean"));
+        assertThat(result, containsString("1"));
+
+        final BeanWithGetter resultBean = new ObjectMapper().readerFor(BeanWithGetter.class)
+            .readValue(result);
+        assertEquals("My bean", resultBean.getTheName());
+    }
+
+    @Test
+    public void whenSerializingUsingJsonFormat_thenCorrect() throws JsonProcessingException, ParseException {
+        final SimpleDateFormat df = new SimpleDateFormat("dd-MM-yyyy hh:mm:ss");
+        df.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+        final String toParse = "20-12-2014 02:30:00";
+        final Date date = df.parse(toParse);
+        final EventWithFormat event = new EventWithFormat("party", date);
+
+        final String result = new ObjectMapper().writeValueAsString(event);
+        assertThat(result, containsString(toParse));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonUnwrapped_thenCorrect() throws JsonProcessingException, ParseException {
+        final UnwrappedUser.Name name = new UnwrappedUser.Name("John", "Doe");
+        final UnwrappedUser user = new UnwrappedUser(1, name);
+
+        final String result = new ObjectMapper().writeValueAsString(user);
+        assertThat(result, containsString("John"));
+        assertThat(result, not(containsString("name")));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonView_thenCorrect() throws JsonProcessingException, JsonProcessingException {
+        final Item item = new Item(2, "book", "John");
+
+        final String result = new ObjectMapper().writerWithView(Views.Public.class)
+            .writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("2"));
+        assertThat(result, not(containsString("John")));
+    }
+
+    @Test
+    public void whenSerializingUsingJacksonReferenceAnnotation_thenCorrect() throws JsonProcessingException {
+        final UserWithRef user = new UserWithRef(1, "John");
+        final ItemWithRef item = new ItemWithRef(2, "book", user);
+        user.addItem(item);
+
+        final String result = new ObjectMapper().writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("John"));
+        assertThat(result, not(containsString("userItems")));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonIdentityInfo_thenCorrect() throws JsonProcessingException {
+        final UserWithIdentity user = new UserWithIdentity(1, "John");
+        final ItemWithIdentity item = new ItemWithIdentity(2, "book", user);
+        user.addItem(item);
+
+        final String result = new ObjectMapper().writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("John"));
+        assertThat(result, containsString("userItems"));
+    }
+
+    @Test
+    public void whenSerializingUsingJsonFilter_thenCorrect() throws JsonProcessingException {
+        final BeanWithFilter bean = new BeanWithFilter(1, "My bean");
+
+        final FilterProvider filters = new SimpleFilterProvider().addFilter("myFilter", SimpleBeanPropertyFilter.filterOutAllExcept("name"));
+
+        final String result = new ObjectMapper().writer(filters)
+            .writeValueAsString(bean);
+
+        assertThat(result, containsString("My bean"));
+        assertThat(result, not(containsString("id")));
+    }
+
+    // =========================
+    @Test
+    public void whenSerializingUsingCustomAnnotation_thenCorrect() throws JsonProcessingException {
+        final BeanWithCustomAnnotation bean = new BeanWithCustomAnnotation(1, "My bean", null);
+
+        final String result = new ObjectMapper().writeValueAsString(bean);
+
+        assertThat(result, containsString("My bean"));
+        assertThat(result, containsString("1"));
+        assertThat(result, not(containsString("dateCreated")));
+    }
+
+    // @Ignore("Jackson 2.7.1-1 seems to have changed the API regarding mixins")
+    @Test
+    public void whenSerializingUsingMixInAnnotation_thenCorrect() throws JsonProcessingException {
+        final com.baeldung.jackson.annotation.dtos.Item item = new com.baeldung.jackson.annotation.dtos.Item(1, "book", null);
+
+        String result = new ObjectMapper().writeValueAsString(item);
+        assertThat(result, containsString("owner"));
+
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.addMixIn(com.baeldung.jackson.annotation.dtos.User.class, MyMixInForIgnoreType.class);
+
+        result = mapper.writeValueAsString(item);
+        assertThat(result, not(containsString("owner")));
+    }
+
+    @Test
+    public void whenDisablingAllAnnotations_thenAllDisabled() throws JsonProcessingException {
+        final MyBean bean = new MyBean(1, null);
+
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.disable(MapperFeature.USE_ANNOTATIONS);
+
+        final String result = mapper.writeValueAsString(bean);
+        assertThat(result, containsString("1"));
+        assertThat(result, containsString("name"));
+    }
+    
+    @Test
+    public void whenDeserializingUsingJsonAlias_thenCorrect() throws IOException {
+
+        // arrange
+        String json = "{\"fName\": \"John\", \"lastName\": \"Green\"}";
+
+        // act
+        AliasBean aliasBean = new ObjectMapper().readerFor(AliasBean.class).readValue(json);
+
+        // assert
+        assertThat(aliasBean.getFirstName(), is("John"));
+    }
+    
+    @Test
+    public void whenSerializingUsingXMLRootNameWithNameSpace_thenCorrect() throws JsonProcessingException {
+
+        // arrange
+        UserWithRootNamespace author = new UserWithRootNamespace(1, "John");
+
+        // act
+        ObjectMapper mapper = new XmlMapper();
+        mapper = mapper.enable(SerializationFeature.WRAP_ROOT_VALUE).enable(SerializationFeature.INDENT_OUTPUT);
+        String result = mapper.writeValueAsString(author);
+
+        // assert
+        assertThat(result, containsString("<user xmlns=\"users\">"));
+
+        /*
+            <user xmlns="users">
+              <id xmlns="">3006b44a-cf62-4cfe-b3d8-30dc6c46ea96</id>
+              <id xmlns="">1</id>
+              <name xmlns="">John</name>
+              <items xmlns=""/>
+            </user>
+        */
+
+    }
+    
+    
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/bidirection/JacksonBidirectionRelationUnitTest.java

@@ -0,0 +1,127 @@
+package com.baeldung.jackson.bidirection;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+import com.baeldung.jackson.bidirection.jsonview.Views;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class JacksonBidirectionRelationUnitTest {
+
+    @Test(expected = JsonMappingException.class)
+    public void givenBidirectionRelation_whenSerializing_thenException() throws JsonProcessingException {
+        final User user = new User(1, "John");
+        final Item item = new Item(2, "book", user);
+        user.addItem(item);
+
+        new ObjectMapper().writeValueAsString(item);
+    }
+
+    @Test
+    public void givenBidirectionRelation_whenUsingJacksonReferenceAnnotation_thenCorrect() throws JsonProcessingException {
+        final UserWithRef user = new UserWithRef(1, "John");
+        final ItemWithRef item = new ItemWithRef(2, "book", user);
+        user.addItem(item);
+
+        final String result = new ObjectMapper().writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("John"));
+        assertThat(result, not(containsString("userItems")));
+    }
+
+    @Test
+    public void givenBidirectionRelation_whenUsingJsonIdentityInfo_thenCorrect() throws JsonProcessingException {
+        final UserWithIdentity user = new UserWithIdentity(1, "John");
+        final ItemWithIdentity item = new ItemWithIdentity(2, "book", user);
+        user.addItem(item);
+
+        final String result = new ObjectMapper().writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("John"));
+        assertThat(result, containsString("userItems"));
+    }
+
+    @Test
+    public void givenBidirectionRelation_whenUsingJsonIgnore_thenCorrect() throws JsonProcessingException {
+        final UserWithIgnore user = new UserWithIgnore(1, "John");
+        final ItemWithIgnore item = new ItemWithIgnore(2, "book", user);
+        user.addItem(item);
+
+        final String result = new ObjectMapper().writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("John"));
+        assertThat(result, not(containsString("userItems")));
+    }
+
+    @Test
+    public void givenBidirectionRelation_whenUsingCustomSerializer_thenCorrect() throws JsonProcessingException {
+        final UserWithSerializer user = new UserWithSerializer(1, "John");
+        final ItemWithSerializer item = new ItemWithSerializer(2, "book", user);
+        user.addItem(item);
+
+        final String result = new ObjectMapper().writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("John"));
+        assertThat(result, containsString("userItems"));
+    }
+
+    @Test
+    public void givenBidirectionRelation_whenDeserializingUsingIdentity_thenCorrect() throws JsonProcessingException, IOException {
+        final String json = "{\"id\":2,\"itemName\":\"book\",\"owner\":{\"id\":1,\"name\":\"John\",\"userItems\":[2]}}";
+
+        final ItemWithIdentity item = new ObjectMapper().readerFor(ItemWithIdentity.class)
+            .readValue(json);
+
+        assertEquals(2, item.id);
+        assertEquals("book", item.itemName);
+        assertEquals("John", item.owner.name);
+    }
+
+    @Test
+    public void givenBidirectionRelation_whenUsingCustomDeserializer_thenCorrect() throws JsonProcessingException, IOException {
+        final String json = "{\"id\":2,\"itemName\":\"book\",\"owner\":{\"id\":1,\"name\":\"John\",\"userItems\":[2]}}";
+
+        final ItemWithSerializer item = new ObjectMapper().readerFor(ItemWithSerializer.class)
+            .readValue(json);
+        assertEquals(2, item.id);
+        assertEquals("book", item.itemName);
+        assertEquals("John", item.owner.name);
+    }
+
+    @Test
+    public void givenBidirectionRelation_whenUsingPublicJsonView_thenCorrect() throws JsonProcessingException {
+        final UserWithView user = new UserWithView(1, "John");
+        final ItemWithView item = new ItemWithView(2, "book", user);
+        user.addItem(item);
+
+        final String result = new ObjectMapper().writerWithView(Views.Public.class)
+            .writeValueAsString(item);
+
+        assertThat(result, containsString("book"));
+        assertThat(result, containsString("John"));
+        assertThat(result, not(containsString("userItems")));
+    }
+
+    @Test(expected = JsonMappingException.class)
+    public void givenBidirectionRelation_whenUsingInternalJsonView_thenException() throws JsonProcessingException {
+        final UserWithView user = new UserWithView(1, "John");
+        final ItemWithView item = new ItemWithView(2, "book", user);
+        user.addItem(item);
+
+        new ObjectMapper().writerWithView(Views.Internal.class)
+            .writeValueAsString(item);
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/format/JsonFormatUnitTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.jackson.format;
+
+import java.util.Date;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.junit.Test;
+
+import static io.restassured.path.json.JsonPath.from;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.data.Percentage.withPercentage;
+
+/**
+ * @author Jay Sridhar
+ * @version 1.0
+ */
+public class JsonFormatUnitTest {
+
+    @Test
+    public void whenSerializedDateFormat_thenCorrect() throws JsonProcessingException {
+
+        User user = new User("Jay", "Sridhar");
+
+        String result = new ObjectMapper().writeValueAsString(user);
+
+        // Expected to match: "2016-12-19@09:34:42.628+0000"
+        assertThat(from(result).getString("createdDate")).matches("\\d{4}\\-\\d{2}\\-\\d{2}@\\d{2}:\\d{2}:\\d{2}\\.\\d{3}\\+\\d{4}");
+
+        // Expected to be close to current time
+        long now = new Date().getTime();
+        assertThat(from(result).getLong("dateNum")).isCloseTo(now, withPercentage(10.0));
+
+    }
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/JacksonSerializationIgnoreUnitTest.java

@@ -0,0 +1,278 @@
+package com.baeldung.jackson.ignore;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Test;
+
+import com.baeldung.jackson.ignore.dtos.MyDto;
+import com.baeldung.jackson.ignore.dtos.MyDtoIncludeNonDefault;
+import com.baeldung.jackson.ignore.dtos.MyDtoWithFilter;
+import com.baeldung.jackson.ignore.dtos.MyDtoWithSpecialField;
+import com.baeldung.jackson.ignore.dtos.MyMixInForIgnoreType;
+import com.baeldung.jackson.ignore.dtos.MyDtoIgnoreField;
+import com.baeldung.jackson.ignore.dtos.MyDtoIgnoreFieldByName;
+import com.baeldung.jackson.ignore.dtos.MyDtoIgnoreNull;
+import com.baeldung.jackson.ignore.dtos.MyDtoNullKeySerializer;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.BeanPropertyWriter;
+import com.fasterxml.jackson.databind.ser.FilterProvider;
+import com.fasterxml.jackson.databind.ser.PropertyFilter;
+import com.fasterxml.jackson.databind.ser.PropertyWriter;
+import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
+import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;
+
+public class JacksonSerializationIgnoreUnitTest {
+
+    // tests - single entity to json
+
+    // ignore
+
+    @Test
+    public final void givenOnlyNonDefaultValuesAreSerializedAndDtoHasOnlyDefaultValues_whenSerializing_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final String dtoAsString = mapper.writeValueAsString(new MyDtoIncludeNonDefault());
+
+        assertThat(dtoAsString, not(containsString("intValue")));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenOnlyNonDefaultValuesAreSerializedAndDtoHasNonDefaultValue_whenSerializing_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final MyDtoIncludeNonDefault dtoObject = new MyDtoIncludeNonDefault();
+        dtoObject.setBooleanValue(true);
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, containsString("booleanValue"));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenFieldIsIgnoredByName_whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final MyDtoIgnoreFieldByName dtoObject = new MyDtoIgnoreFieldByName();
+        dtoObject.setBooleanValue(true);
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, not(containsString("intValue")));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenFieldIsIgnoredDirectly_whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final MyDtoIgnoreField dtoObject = new MyDtoIgnoreField();
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, not(containsString("intValue")));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        System.out.println(dtoAsString);
+    }
+
+    // @Ignore("Jackson 2.7.1-1 seems to have changed the API for this case")
+    @Test
+    public final void givenFieldTypeIsIgnored_whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.addMixIn(String[].class, MyMixInForIgnoreType.class);
+        final MyDtoWithSpecialField dtoObject = new MyDtoWithSpecialField();
+        dtoObject.setBooleanValue(true);
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, containsString("intValue"));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        assertThat(dtoAsString, not(containsString("stringValue")));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenTypeHasFilterThatIgnoresFieldByName_whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final SimpleBeanPropertyFilter theFilter = SimpleBeanPropertyFilter.serializeAllExcept("intValue");
+        final FilterProvider filters = new SimpleFilterProvider().addFilter("myFilter", theFilter);
+
+        final MyDtoWithFilter dtoObject = new MyDtoWithFilter();
+        dtoObject.setIntValue(12);
+
+        final String dtoAsString = mapper.writer(filters)
+            .writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, not(containsString("intValue")));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        assertThat(dtoAsString, containsString("stringValue"));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenTypeHasFilterThatIgnoresNegativeInt_whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
+        final PropertyFilter theFilter = new SimpleBeanPropertyFilter() {
+            @Override
+            public final void serializeAsField(final Object pojo, final JsonGenerator jgen, final SerializerProvider provider, final PropertyWriter writer) throws Exception {
+                if (include(writer)) {
+                    if (!writer.getName()
+                        .equals("intValue")) {
+                        writer.serializeAsField(pojo, jgen, provider);
+                        return;
+                    }
+
+                    final int intValue = ((MyDtoWithFilter) pojo).getIntValue();
+                    if (intValue >= 0) {
+                        writer.serializeAsField(pojo, jgen, provider);
+                    }
+                } else if (!jgen.canOmitFields()) { // since 2.3
+                    writer.serializeAsOmittedField(pojo, jgen, provider);
+                }
+            }
+
+            @Override
+            protected final boolean include(final BeanPropertyWriter writer) {
+                return true;
+            }
+
+            @Override
+            protected final boolean include(final PropertyWriter writer) {
+                return true;
+            }
+        };
+        final FilterProvider filters = new SimpleFilterProvider().addFilter("myFilter", theFilter);
+
+        final MyDtoWithFilter dtoObject = new MyDtoWithFilter();
+        dtoObject.setIntValue(-1);
+
+        final ObjectMapper mapper = new ObjectMapper();
+        final String dtoAsString = mapper.writer(filters)
+            .writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, not(containsString("intValue")));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        assertThat(dtoAsString, containsString("stringValue"));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenNullsIgnoredOnClass_whenWritingObjectWithNullField_thenIgnored() throws JsonProcessingException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final MyDtoIgnoreNull dtoObject = new MyDtoIgnoreNull();
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, containsString("intValue"));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        assertThat(dtoAsString, not(containsString("stringValue")));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenNullsIgnoredGlobally_whenWritingObjectWithNullField_thenIgnored() throws JsonProcessingException {
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.setSerializationInclusion(Include.NON_NULL);
+        final MyDto dtoObject = new MyDto();
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, containsString("intValue"));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        assertThat(dtoAsString, not(containsString("stringValue")));
+        System.out.println(dtoAsString);
+    }
+
+    // map
+
+    @Test
+    public final void givenIgnoringMapNullValue_whenWritingMapObjectWithNullValue_thenIgnored() throws JsonProcessingException {
+        final ObjectMapper mapper = new ObjectMapper();
+        // mapper.configure(SerializationFeature.WRITE_NULL_MAP_VALUES, false);
+        mapper.setSerializationInclusion(Include.NON_NULL);
+
+        final MyDto dtoObject1 = new MyDto();
+
+        final Map<String, MyDto> dtoMap = new HashMap<String, MyDto>();
+        dtoMap.put("dtoObject1", dtoObject1);
+        dtoMap.put("dtoObject2", null);
+
+        final String dtoMapAsString = mapper.writeValueAsString(dtoMap);
+
+        assertThat(dtoMapAsString, containsString("dtoObject1"));
+        assertThat(dtoMapAsString, not(containsString("dtoObject2")));
+        System.out.println(dtoMapAsString);
+    }
+
+    @Test
+    public final void givenIgnoringMapValueObjectWithNullField_whenWritingMapValueObjectWithNullField_thenIgnored() throws JsonProcessingException {
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.setSerializationInclusion(Include.NON_NULL);
+
+        final MyDto dtoObject = new MyDto();
+
+        final Map<String, MyDto> dtoMap = new HashMap<String, MyDto>();
+        dtoMap.put("dtoObject", dtoObject);
+
+        final String dtoMapAsString = mapper.writeValueAsString(dtoMap);
+
+        assertThat(dtoMapAsString, containsString("dtoObject"));
+        assertThat(dtoMapAsString, not(containsString("stringValue")));
+        System.out.println(dtoMapAsString);
+    }
+
+    @Test
+    public final void givenAllowingMapObjectWithNullKey_whenWriting_thenCorrect() throws JsonProcessingException {
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.getSerializerProvider()
+            .setNullKeySerializer(new MyDtoNullKeySerializer());
+
+        final MyDto dtoObject1 = new MyDto();
+        dtoObject1.setStringValue("dtoObjectString1");
+        final MyDto dtoObject2 = new MyDto();
+        dtoObject2.setStringValue("dtoObjectString2");
+
+        final Map<String, MyDto> dtoMap = new HashMap<String, MyDto>();
+        dtoMap.put(null, dtoObject1);
+        dtoMap.put("obj2", dtoObject2);
+
+        final String dtoMapAsString = mapper.writeValueAsString(dtoMap);
+
+        System.out.println(dtoMapAsString);
+        assertThat(dtoMapAsString, containsString("\"\""));
+        assertThat(dtoMapAsString, containsString("dtoObjectString1"));
+        assertThat(dtoMapAsString, containsString("obj2"));
+    }
+
+    @Test
+    public final void givenAllowingMapObjectOneNullKey_whenWritingMapObjectWithTwoNullKeys_thenOverride() throws JsonProcessingException {
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.getSerializerProvider()
+            .setNullKeySerializer(new MyDtoNullKeySerializer());
+
+        final MyDto dtoObject1 = new MyDto();
+        dtoObject1.setStringValue("dtoObject1String");
+
+        final MyDto dtoObject2 = new MyDto();
+        dtoObject2.setStringValue("dtoObject2String");
+
+        final Map<String, MyDto> dtoMap = new HashMap<String, MyDto>();
+        dtoMap.put(null, dtoObject1);
+        dtoMap.put(null, dtoObject2);
+
+        final String dtoMapAsString = mapper.writeValueAsString(dtoMap);
+
+        assertThat(dtoMapAsString, not(containsString("dtoObject1String")));
+        assertThat(dtoMapAsString, containsString("dtoObject2String"));
+        System.out.println(dtoMapAsString);
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDto.java

@@ -0,0 +1,54 @@
+package com.baeldung.jackson.ignore.dtos;
+
+public class MyDto {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDto() {
+        super();
+    }
+
+    public MyDto(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        return "MyDto [stringValue=" + stringValue + ", intValue=" + intValue + ", booleanValue=" + booleanValue + "]";
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoIgnoreField.java

@@ -0,0 +1,42 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+
+public class MyDtoIgnoreField {
+
+    private String stringValue;
+    @JsonIgnore
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoIgnoreField() {
+        super();
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoIgnoreFieldByName.java

@@ -0,0 +1,42 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+@JsonIgnoreProperties(value = { "intValue" })
+public class MyDtoIgnoreFieldByName {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoIgnoreFieldByName() {
+        super();
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoIgnoreNull.java

@@ -0,0 +1,51 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+
+@JsonInclude(Include.NON_NULL)
+public class MyDtoIgnoreNull {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoIgnoreNull() {
+        super();
+    }
+
+    public MyDtoIgnoreNull(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoIncludeNonDefault.java

@@ -0,0 +1,43 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+
+@JsonInclude(Include.NON_DEFAULT)
+public class MyDtoIncludeNonDefault {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoIncludeNonDefault() {
+        super();
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoNullKeySerializer.java

@@ -0,0 +1,27 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class MyDtoNullKeySerializer extends StdSerializer<Object> {
+
+    private static final long serialVersionUID = -4478531309177369056L;
+
+    public MyDtoNullKeySerializer() {
+        this(null);
+    }
+
+    public MyDtoNullKeySerializer(final Class<Object> t) {
+        super(t);
+    }
+
+    @Override
+    public void serialize(final Object value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
+        jgen.writeFieldName("");
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoWithFilter.java

@@ -0,0 +1,50 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonFilter;
+
+@JsonFilter("myFilter")
+public class MyDtoWithFilter {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoWithFilter() {
+        super();
+    }
+
+    public MyDtoWithFilter(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoWithSpecialField.java

@@ -0,0 +1,54 @@
+package com.baeldung.jackson.ignore.dtos;
+
+public class MyDtoWithSpecialField {
+
+    private String[] stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoWithSpecialField() {
+        super();
+    }
+
+    public MyDtoWithSpecialField(final String[] stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String[] getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String[] stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        return "MyDto [stringValue=" + stringValue + ", intValue=" + intValue + ", booleanValue=" + booleanValue + "]";
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyMixInForIgnoreType.java

@@ -0,0 +1,8 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreType;
+
+@JsonIgnoreType
+public class MyMixInForIgnoreType {
+    //
+}

jackson-annotations/src/test/java/com/baeldung/jackson/jsonproperty/JsonPropertyUnitTest.java

@@ -0,0 +1,44 @@
+package com.baeldung.jackson.jsonproperty;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.util.List;
+import org.junit.Test;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.core.JsonGenerationException;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+
+public class JsonPropertyUnitTest {
+
+    @Test
+    public final void whenSerializing_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final String dtoAsString = mapper.writeValueAsString(new MyDto());
+
+        assertThat(dtoAsString, containsString("intValue"));
+        assertThat(dtoAsString, containsString("stringValue"));
+        assertThat(dtoAsString, containsString("booleanValue"));
+    }
+
+    @Test
+    public final void givenNameOfFieldIsChangedViaAnnotationOnGetter_whenSerializing_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final MyDtoFieldNameChanged dtoObject = new MyDtoFieldNameChanged();
+        dtoObject.setStringValue("a");
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, not(containsString("stringValue")));
+        assertThat(dtoAsString, containsString("strVal"));
+        System.out.println(dtoAsString);
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/jsonproperty/MyDto.java

@@ -0,0 +1,54 @@
+package com.baeldung.jackson.jsonproperty;
+
+public class MyDto {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDto() {
+        super();
+    }
+
+    public MyDto(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        return "MyDto [stringValue=" + stringValue + ", intValue=" + intValue + ", booleanValue=" + booleanValue + "]";
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/jsonproperty/MyDtoFieldNameChanged.java

@@ -0,0 +1,50 @@
+package com.baeldung.jackson.jsonproperty;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class MyDtoFieldNameChanged {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoFieldNameChanged() {
+        super();
+    }
+
+    public MyDtoFieldNameChanged(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    @JsonProperty("strVal")
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}