In Java, How do I represent multiple objects (of same type) in a single JSON object

Question

I need to pass the attribtutes of particular type, as apart of a restful service to a javascript which will then display them to a webpage

  @GET
  @Produces("application/json")
  @Consumes("application/json") 
  @Path("/getStatusAll")

  public void getStatusAll(
      @Context HttpServletRequest request,
      @Context HttpServletResponse response) throws ServletException,
      IOException

{

 JSONArray jArray = new JSONArray();

 Collection<S> s = Manager.getS().values();
 for (Server i : svr)
 {
   JSONObject m = new JSONObject();

   m.put("name",i.getName());
   m.put("status",i.getStatus());

   jArray.add(m);

 }

 return jArray.toString();


    response.getOutputStream().print(jArray);
     response.flushBuffer();
}

JAVASCRIPT will need to read ONE JSON object looking like:

[ {name:someName0, status: someStatus},
 {name:someName1, status: someStatus},
 {name:someName2, status: someStatus}...etc]

MBCook · Accepted Answer · 2011-06-20 16:05:16Z

2

What you're doing is the correct way to do it. JSON calls always return one object.

The object you got back is an array, so you can extract the elements like this:

var myResponse = makeJSONCall();

// You have received myResponse.length objects, you can bind them
// to variables if you want

var thingOne = myResponse[0];
var thingTwo = myResponse[1];
...

// You can use them from their variable names or straight from the array

thingOne.name = "Joe Bob";
myResponse[3].status = "Tired";

answered Jun 20, 2011 at 16:05

MBCook

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Comments

Jigar Joshi · Accepted Answer · 2011-06-20 16:04:47Z

1

using json lib

List mybeanList = new ArrayList();
mybeanList.add(myBean1);
mybeanList.add(myBean2);

JSONArray jsonArray = JSONArray.fromObject(mybeanList);

You can also use XStream to do this

See Also

Google gson

answered Jun 20, 2011 at 16:04

Jigar Joshi

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