JSON Creation from Java

Question

HI I am new to JSON and I have to create the below JSON from Java.

{{ "TESTMAIN" : { "TEST1" : { "384" : "250", "96" : "450" },
           "TEST2" :{ "384" : "5", "96" : "10" },
           "TEST3" : "256",
           "TEST4" : "T" }

I have created each object using JSONObject.put. But how to combine the 4 TEST objects with the text TESTMAIN. Any idea?

score 1 · Answer 1 · answered Jul 01 '11 at 14:10

The json library is awfully verbose, this should do what you need:

final JSONObject wrapper = new JSONObject();
final JSONObject inner = new JSONObject();
final JSONObject innersub1 = new JSONObject();
innersub1.put("384", "250");
innersub1.put("96", "450");
final JSONObject innersub2 = new JSONObject();
innersub2.put("384", "5");
innersub2.put("96", "10");
inner.put("TEST1", innersub1);
inner.put("TEST2", innersub2);
inner.put("TEST3", "256");
inner.put("TEST4", "T");
wrapper.put("TESTMAIN", inner);
System.out.println(wrapper.toString());

I would advise you to look at more modern JSON libraries like Gson or Jackson, because they make life a lot simpler!

score 0 · Answer 2 · answered Jul 01 '11 at 13:55

0

Is there any particular reason you're doing this by hand? There is a JSON library for Java that can do this for you.

JSON in Java, it has APIs for creating objects, arrays, etc. It will also serialize and deserialize JSON.

answered Jul 01 '11 at 13:55

Dave G

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I use [json-simple](http://code.google.com/p/json-simple/), which is as the name implies - simple :) – Thomas Jul 01 '11 at 13:56
See section 2-3 of their examples. That covers how to use a List implementation to add an array. – Dave G Jul 01 '11 at 13:59
any sample code to form the above JSON using the libraries.. Thanks – Vikram P Jul 01 '11 at 14:01

score 0 · Answer 3 · answered Jul 01 '11 at 13:55

0

You need a JSONArray.

answered Jul 01 '11 at 13:55

Oh Chin Boon

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1

Nope, a JSONArray will create square brackets. He needs nested JSONObjects. – Sean Patrick Floyd Jul 01 '11 at 14:11

JSON Creation from Java

3 Answers3