Jackson Streaming API to Write JSON

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In this tutorial we are going to see how to write JSON into file using JsonGenerator class available in Jackson.Jackson Streaming API is high-performance Java API for read write JSON.
JsonGenerator – is used to write JSON as String and File.
1. Create project called JSONExample.
2. Create package called com.javatutorialscorner.jackson 
3. add jackson-mapper-asl-1.9.13.jar, jackson-core-asl-1.9.13.jar into build path.
4. Create java class called JSONGeneratorExample under com.javatutorialscorner.jackson
JSONGeneratorExample.java

package com.javatutorialscorner.jackson;

import java.io.File;
import java.io.IOException;

import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerator;

public class JSONGeneratorExample {

 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  JsonFactory factory = null;
  JsonGenerator jsonGenerator = null;

  try {
   factory = new JsonFactory();
   jsonGenerator = factory.createJsonGenerator(new File(
     "C:\\jtc\\javatutorialscorner.json"), JsonEncoding.UTF8);
   jsonGenerator.writeStartObject();
   jsonGenerator.writeStringField("name", "Java Tutorials Corner");
   jsonGenerator.writeNumberField("rank", 1);
   jsonGenerator.writeFieldName("Tutorials");
   jsonGenerator.writeStartArray();
   jsonGenerator.writeString("Java");
   jsonGenerator.writeString("Servlet");
   jsonGenerator.writeString("JSP");
   jsonGenerator.writeString("Struts 1.x");
   jsonGenerator.writeString("Struts 2.x");
   jsonGenerator.writeString("Spring");
   jsonGenerator.writeString("Hibernate");
   jsonGenerator.writeString("Log4j");
   jsonGenerator.writeString("JSON");
   jsonGenerator.writeString("Web Services");
   jsonGenerator.writeString("JSF");
   jsonGenerator.writeString("Eclipse");
   jsonGenerator.writeEndArray();
   jsonGenerator.writeEndObject();
   jsonGenerator.close();

  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

 }

}

Now run the program see the file created at specified location with following content.

{"name":"Java Tutorials Corner","rank":1,"Tutorials":["Java","Servlet","JSP","Struts 1.x","Struts 2.x","Spring","Hibernate","Log4j","JSON","Web Services","JSF","Eclipse"]}

Jackson Java JSON 10/18/2013 06:50:00 pm