BAEL-390: json processing with java ee 7

jee7/src/main/java/com/baeldung/json/Person.java

@@ -0,0 +1,43 @@
+package com.baeldung.json;
+
+import java.util.Date;
+import java.util.List;
+
+public class Person {
+    private String firstName;
+    private String lastName;
+    private Date birthdate;
+    private List<String> emails;
+
+    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;
+    }
+
+    public Date getBirthdate() {
+        return birthdate;
+    }
+
+    public void setBirthdate(Date birthdate) {
+        this.birthdate = birthdate;
+    }
+
+    public List<String> getEmails() {
+        return emails;
+    }
+
+    public void setEmails(List<String> emails) {
+        this.emails = emails;
+    }
+}

jee7/src/main/java/com/baeldung/json/PersonBuilder.java

@@ -0,0 +1,49 @@
+package com.baeldung.json;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.json.Json;
+import javax.json.JsonArray;
+import javax.json.JsonObject;
+import javax.json.JsonReader;
+import javax.json.JsonString;
+
+public class PersonBuilder {
+    private String jsonString;
+
+    private SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
+
+    public PersonBuilder(String jsonString) {
+        this.jsonString = jsonString;
+    }
+
+    public Person build() throws IOException, ParseException {
+        JsonReader reader = Json.createReader(new StringReader(jsonString));
+
+        JsonObject jsonObject = reader.readObject();
+
+        Person person = new Person();
+
+        person.setFirstName(jsonObject.getString("firstName"));
+        person.setLastName(jsonObject.getString("lastName"));
+        person.setBirthdate(dateFormat.parse(jsonObject.getString("birthdate")));
+
+        JsonArray emailsJson = jsonObject.getJsonArray("emails");
+
+        List<String> emails = new ArrayList<>();
+
+        for (JsonString j : emailsJson.getValuesAs(JsonString.class)) {
+            emails.add(j.getString());
+        }
+
+        person.setEmails(emails);
+
+        return person;
+    }
+
+}

jee7/src/main/java/com/baeldung/json/PersonWriter.java

@@ -0,0 +1,67 @@
+package com.baeldung.json;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.io.Writer;
+import java.text.SimpleDateFormat;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.json.Json;
+import javax.json.JsonArrayBuilder;
+import javax.json.JsonObject;
+import javax.json.JsonObjectBuilder;
+import javax.json.JsonWriterFactory;
+import javax.json.stream.JsonGenerator;
+
+public class PersonWriter {
+    private Person person;
+
+    private SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
+    
+    public PersonWriter(Person person) {
+        this.person = person;
+    }
+
+    public String write() throws IOException {
+        JsonObjectBuilder objectBuilder = Json.createObjectBuilder()
+                .add("firstName", person.getFirstName())
+                .add("lastName", person.getLastName())
+                .add("birthdate", dateFormat.format(person.getBirthdate()));
+        
+        JsonArrayBuilder arrayBuilder = Json.createArrayBuilder();
+                
+        for(String email : person.getEmails()) {
+            arrayBuilder.add(email);
+        }
+        
+        objectBuilder.add("emails", arrayBuilder);
+        
+        JsonObject jsonObject = objectBuilder.build();
+        
+        JsonWriterFactory writerFactory = createWriterFactory();
+        
+        String jsonString = writeToString(jsonObject, writerFactory);    
+        
+        return jsonString;
+        
+    }
+
+    private String writeToString(JsonObject jsonObject, JsonWriterFactory writerFactory) throws IOException {
+        String jsonString;
+        try(Writer writer = new StringWriter()) {
+            writerFactory.createWriter(writer).write(jsonObject);
+            jsonString = writer.toString();
+        }
+        return jsonString;
+    }
+
+    private JsonWriterFactory createWriterFactory() {
+        Map<String, Boolean> config = new HashMap<>();
+
+        config.put(JsonGenerator.PRETTY_PRINTING, true);
+        
+        JsonWriterFactory writerFactory = Json.createWriterFactory(config);
+        return writerFactory;
+    }
+}