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示例準備工作： 1.從http://json-lib.sourceforge.net/ 下載json-lib-2.2.3-jdk15.jar。但它還依賴如下jar包：    jakarta commons-lang 2.4       jakarta commons-beanutils 1.7.0       jakarta commons-collections 3.2       jakarta commons-logging 1.1.1       ezmorph 1.0.6      如需用到json、xml之間的轉換還需要 xom-1.1.jar 2.從http://www.JSON.org/json2.js下載json.js

示例一

java代碼：

User user = new User("canglang");user.setName("name");JsonObject jsonUser = JsonObject.fromObject(user);reponse.getWriter().PRint(jsonUser.toString());js代碼：

$.Ajax({    url : url,    data : {"param1":value1, "param2":value2},    success : function(jsonData) {         var jsonUser = eval(jsonData);//使用eval轉換JSON字符到JSON對象          alert(jsonUser.name);    }});

示例二

Java代碼：

Map<User> userMap = new HashMap<User>();userMap.put("name", "canglang");userMap.put("passWord", "pwd");JsonObject jsonUserMap = JsonObject.fromObject(userMap);reponse.getWriter().print(jsonUserMap.toString());

js代碼：$.ajax({    url : url,    data : {"param1":value1, "param2":value2},    success : function(jsonData) {         var jsonUserMap = eval(jsonData);         var name = jsonUserMap.name;         alert(name);    }}); 

示例三

Java代碼：

List<User> userList = new ArrayList<User>();userList.add(new User("name1", "password1"));userList.add(new User("name2", "password2"));JsonObject jsonUserList = JsonArray.fromObject(userList);

reponse.getWriter().print(jsonUserList.toString());

js代碼：$.ajax({    url : url,    data : {"param1":value1, "param2":value2},    success : function(jsonData) {        var jsonUserList = eval(jsonData);        var name = jsonUserList[0].name;        alert(name);    }});

示例四

js代碼：

var jsonObj = {"name":"admin", "password":"password"};var text = jsonObj.toJSONString());   

Java代碼：JSONObject json = JSONObject.fromObject(text);User user= (User) json.toBean(jso, User.class);

可繼續閱讀：http://blog.csdn.net/yezi1305/article/details/4483813