Hi,

In Java you can use the following code to crate the json response:

JSONObject obj=new JSONObject();

obj.put("name","foo");
obj.put("num",new Integer(100));
obj.put("balance",new Double(1000.21));
obj.put("is_vip",new Boolean(true));
obj.put("nickname","sada");
out.print(obj);
out.flush();

and the use

jQuery.getJSON( url, [ data ], [ callback(data, textStatus, xhr) ] )

at client side to process the json data.

Thanks