Java Map to Json using Jackson Example

Java Map to Json :

Here is a simple example program for how to converting java map data into the Json file using jackson.

JavaMapToJsonFile.java

package com.JasonProjectDeomo.Jackson.JsonWrite;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.ObjectWriter;
import org.codehaus.jackson.util.DefaultPrettyPrinter;

public class JavaMapToJsonFile {
  public static void main(String[] args) throws JsonGenerationException,
      JsonMappingException, IOException {

    Map<String, Object> person = new HashMap<String, Object>();
    Map<String, String> address = new HashMap<String, String>();
    address.put("Vill.", "Dhananjaypur");
    address.put("Dist.", "Varanasi");
    address.put("State", "UP");
    person.put("id", "1");
    person.put("name", "Arvind");
    person.put("address", address);
    ObjectMapper mapper = new ObjectMapper();
    ObjectWriter writer = mapper.writer(new DefaultPrettyPrinter());
    mapper.writeValue(new File("JacksonFile/dataTwo.json"), person);
    System.out.println("--Done--");
  }
}

Output

–Done–