how to create json structure in java?

Question

var abc = {"action":"Remove",        
           "datatable":[
                        {"userid":"userid0","username":"name0"}, 
                        {"userid":"userid1","username":"name1"},               
                        {"userid":"userid2","username":"name2"},           
                        {"userid":"userid3","username":"name3"}                 
                       ]     
           , "msgType":"success"};

How could I create above JSON structure in java and send it as response & at client side how could I parse it?

Answer 1

Use Google's gson library. It converts java objects to and from json.
I've used it and it's really good.

Answer 2

Simple as using springframework and mark your @Controller method with @ResponseBody to json-encode your pojos.

Also use @RequestBody to decode json back and if needed use jackson annotations to customize d/encoding

Answer 3

考虑使用groovy： http : //groovy.codehaus.org/gapi/groovy/json/JsonBuilder.html （虽然不会在客户端帮助您）