JAVA-8370: Split or move json module

json-2/README.md

@@ -8,3 +8,5 @@ This module contains articles about JSON.
 - [Introduction to Moshi Json](https://www.baeldung.com/java-json-moshi)
 - [Hypermedia Serialization With JSON-LD](https://www.baeldung.com/json-linked-data)
 - [Generate a Java Class From JSON](https://www.baeldung.com/java-generate-class-from-json)
+- [A Guide to FastJson](https://www.baeldung.com/fastjson)
+- More Articles: [[<-- prev]](/json)

json-2/pom.xml

@@ -14,6 +14,11 @@
     </parent>
 
     <dependencies>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+            <version>${fastjson.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.jsonschema2pojo</groupId>
             <artifactId>jsonschema2pojo-core</artifactId>
@@ -142,6 +147,7 @@
     <properties>
         <jsoniter.version>0.9.23</jsoniter.version>
         <moshi.version>1.9.2</moshi.version>
+        <fastjson.version>1.2.21</fastjson.version>
     </properties>
 
 </project>

json-2/src/test/java/com/baeldung/fastjson/FastJsonUnitTest.java

@@ -0,0 +1,95 @@
+package com.baeldung.fastjson;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONArray;
+import com.alibaba.fastjson.JSONObject;
+import com.alibaba.fastjson.serializer.BeanContext;
+import com.alibaba.fastjson.serializer.ContextValueFilter;
+import com.alibaba.fastjson.serializer.NameFilter;
+import com.alibaba.fastjson.serializer.SerializeConfig;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class FastJsonUnitTest {
+    private List<Person> listOfPersons;
+
+    @Before
+    public void setUp() {
+        listOfPersons = new ArrayList<Person>();
+        Calendar calendar = Calendar.getInstance();
+        calendar.set(2016, 6, 24);
+        listOfPersons.add(new Person(15, "John", "Doe", calendar.getTime()));
+        listOfPersons.add(new Person(20, "Janette", "Doe", calendar.getTime()));
+    }
+
+    @Test
+    public void whenJavaList_thanConvertToJsonCorrect() {
+        String personJsonFormat = JSON.toJSONString(listOfPersons);
+        assertEquals(personJsonFormat, "[{\"FIRST NAME\":\"Doe\",\"LAST NAME\":\"John\",\"DATE OF BIRTH\":" + "\"24/07/2016\"},{\"FIRST NAME\":\"Doe\",\"LAST NAME\":\"Janette\",\"DATE OF BIRTH\":" + "\"24/07/2016\"}]");
+    }
+
+    @Test
+    public void whenJson_thanConvertToObjectCorrect() {
+        String personJsonFormat = JSON.toJSONString(listOfPersons.get(0));
+        Person newPerson = JSON.parseObject(personJsonFormat, Person.class);
+        assertEquals(newPerson.getAge(), 0); // serialize is set to false for age attribute
+        assertEquals(newPerson.getFirstName(), listOfPersons.get(0)
+            .getFirstName());
+        assertEquals(newPerson.getLastName(), listOfPersons.get(0)
+            .getLastName());
+    }
+
+    @Test
+    public void whenGenerateJson_thanGenerationCorrect() throws ParseException {
+        JSONArray jsonArray = new JSONArray();
+        for (int i = 0; i < 2; i++) {
+            JSONObject jsonObject = new JSONObject();
+            jsonObject.put("FIRST NAME", "John" + i);
+            jsonObject.put("LAST NAME", "Doe" + i);
+            jsonObject.put("DATE OF BIRTH", "2016/12/12 12:12:12");
+            jsonArray.add(jsonObject);
+        }
+        assertEquals(jsonArray.toString(), "[{\"LAST NAME\":\"Doe0\",\"DATE OF BIRTH\":" + "\"2016/12/12 12:12:12\",\"FIRST NAME\":\"John0\"},{\"LAST NAME\":\"Doe1\"," + "\"DATE OF BIRTH\":\"2016/12/12 12:12:12\",\"FIRST NAME\":\"John1\"}]");
+    }
+
+    @Test
+    public void givenContextFilter_whenJavaObject_thanJsonCorrect() {
+        ContextValueFilter valueFilter = new ContextValueFilter() {
+            public Object process(BeanContext context, Object object, String name, Object value) {
+                if (name.equals("DATE OF BIRTH")) {
+                    return "NOT TO DISCLOSE";
+                }
+                if (value.equals("John") || value.equals("Doe")) {
+                    return ((String) value).toUpperCase();
+                } else {
+                    return null;
+                }
+            }
+        };
+        JSON.toJSONString(listOfPersons, valueFilter);
+    }
+
+    @Test
+    public void givenSerializeConfig_whenJavaObject_thanJsonCorrect() {
+        NameFilter formatName = new NameFilter() {
+            public String process(Object object, String name, Object value) {
+                return name.toLowerCase()
+                    .replace(" ", "_");
+            }
+        };
+        SerializeConfig.getGlobalInstance()
+            .addFilter(Person.class, formatName);
+        String jsonOutput = JSON.toJSONStringWithDateFormat(listOfPersons, "yyyy-MM-dd");
+        assertEquals(jsonOutput, "[{\"first_name\":\"Doe\",\"last_name\":\"John\"," + "\"date_of_birth\":\"2016-07-24\"},{\"first_name\":\"Doe\",\"last_name\":" + "\"Janette\",\"date_of_birth\":\"2016-07-24\"}]");
+        // resetting custom serializer
+        SerializeConfig.getGlobalInstance()
+            .put(Person.class, null);
+    }
+}

json-2/src/test/java/com/baeldung/fastjson/Person.java

@@ -0,0 +1,69 @@
+package com.baeldung.fastjson;
+
+import com.alibaba.fastjson.annotation.JSONField;
+
+import java.util.Date;
+
+public class Person {
+
+    @JSONField(name = "AGE", serialize = false, deserialize = false)
+    private int age;
+
+    @JSONField(name = "LAST NAME", ordinal = 2)
+    private String lastName;
+
+    @JSONField(name = "FIRST NAME", ordinal = 1)
+    private String firstName;
+
+    @JSONField(name = "DATE OF BIRTH", format = "dd/MM/yyyy", ordinal = 3)
+    private Date dateOfBirth;
+
+    public Person() {
+
+    }
+
+    public Person(int age, String lastName, String firstName, Date dateOfBirth) {
+        super();
+        this.age = age;
+        this.lastName = lastName;
+        this.firstName = firstName;
+        this.dateOfBirth = dateOfBirth;
+    }
+
+    @Override
+    public String toString() {
+        return "Person [age=" + age + ", lastName=" + lastName + ", firstName=" + firstName + ", dateOfBirth=" + dateOfBirth + "]";
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public Date getDateOfBirth() {
+        return dateOfBirth;
+    }
+
+    public void setDateOfBirth(Date dateOfBirth) {
+        this.dateOfBirth = dateOfBirth;
+    }
+}