//将json格式的字符串转为json对象

var t = JSON.parse('{"name":123}'); 

alert(t.name); 

//json对象数组。

//packJson 为对象数组

packJson = [

                  {"name":"nikita", "password":"1111"},

                  {"name":"tony", "password":"2222"}

];

//json  to  string

var s = JSON.stringify(packJson);

//S为字符串。

alert(packJson[0].name); //访问对象数组packJson

String jsonString = "["

                                    + "{\"author\":\"7\",\"id\":358,\"title\":\"Japan\",\"pictures\":[{\"description\":\"001\",\"imgPath\":\"/cms/u/cms/www/201203/05150720ii68.jpg\"},{\"description\":\"002\",\"imgPath\":\"/cms/u/cms/www/201203/05150720ii67.jpg\"}],\"path\":\"ip\"},"

                                    + "{\"author\":\"8\",\"id\":359,\"title\":\"China\",\"pictures\":[{\"description\":\"101\",\"imgPath\":\"/cms/u/cms/www/201203/111111111111.jpg\"},{\"description\":\"102\",\"imgPath\":\"/cms/u/cms/www/201203/222222222222.jpg\"}],\"path\":\"ip\"}]";

JSONArray array = JSONArray.fromObject(jsonString);

if (array.size() > 0) {

                           for (int i = 0; i < array.size(); i++) {

                                    JSONObject job = array.getJSONObject(i); // 遍历 jsonarray

                                                                                                                                                                                                                                                                                                                  System.out.println("author : " + job.get("author") ); // 得到 每个对象中的属性值

                           }

                  }

        /**

         * java对象转换成json对象，并获取json对象属性

         */

        JSONObject jsonStu = JSONObject.fromObject(student);

        System.out.println(jsonStu.toString());

        System.out.println(jsonStu.getJSONArray("hobby"));
        

 JSONArray array = JSONArray.fromObject(userlist);

String jsonstr = array.toString();

JSONObject object = JSONObject.fromObject(invite);

  String personstr = “”

  JSONArray json = JSONArray.fromObject(personstr);

  List<InvoidPerson> persons = (List<InvoidPerson>)JSONArray.toCollection(json, nvoidPerson.class);