how to create a JSON object in action class of JAVA

Question

I want to create a JSON object. I have tried the following

myString=new JSONObject().put("JSON", sampleClass).toString();

but mystring gives me {"SampleClass@170f98"}.

I also tried the following

 XStream xsStream=new XStream(new JsonHierarchicalStreamDriver());
 SampleClass sampleClass=new SampleClass(userset.getId(),userset.getUsername());
 myString=xsStream.toXML(sampleClass);

It works but when i use getJSON in javascript to get myString it does not work.

Answer 1

You should try:

XStream xsStream=new XStream(new JettisonMappedXmlDriver());

Answer 2

try

String myString = new JSONObject().put("JSON", new JSONObject(sampleClass)).toString();

in my instance it looks like this:

import org.json.JSONObject;
import org.junit.Test;

public class JsonTest
{
    public static class SampleClass
    {
        private String id;

        private String userName;

        public SampleClass ( String id, String name )
        {
            this.id = id;
            this.userName = name;
        }

        public String getUserName ()
        {
            return userName;
        }

        public void setUserName ( String userName )
        {
            this.userName = userName;
        }

        public String getId ()
        {
            return id;
        }

        public void setId ( String id )
        {
            this.id = id;
        }
    }

    @Test
    public void testSampleClass () throws Exception
    {
        SampleClass sampleClass = new SampleClass ( "myId", "MyName" );
        System.out.println ( new JSONObject ( sampleClass ).toString () );
    }
}

the result looks like this:

{"userName":"MyName","id":"myId"}

Answer 3

Look into GSON, a Java Library for converting Objects to JSON by Google. GSON Library

From the Google Code site:

• Provide simple toJson() and fromJson() methods to convert Java objects to JSON and vice-versa
• Allow pre-existing unmodifiable objects to be converted to and from JSON