Java解析Json数据的两种方式

JSON数据解析的有点在于他的体积小，在网络上传输的时候可以更省流量，所以使用越来越广泛，下面介绍使用JsonObject和JsonArray的两种方式解析Json数据。

使用以上两种方式解析json均需要依赖json-lib.jar开发包使用依赖包

1、JsonObject

使用JsonObject解析只有一条数据的json是非常方便的例如："{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"}"

public static void main(String[] args) {  
  
         String jsonString ="{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"}";  
         JSONObject json = JSONObject.fromObject(jsonString);  
         User user = new User();  
         user.setName(json.getString("name"));  
         user.setPassword(json.getString("password"));  
         user.setEmail(json.getString("email"));  
         System.out.println(user.toString());  
    }  

2、JsonArray

使用JsonArray解析数组数据的json是非常方便的例如："[{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"},{"name":"lisi","password":"lisi123","email":"1435123@qq.com"}]"

String json ="[{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"},{"name":"lisi","password":"lisi123","email":"1435123@qq.com"}]";  
         JSONArray jsonArray = JSONArray.fromObject(json);  
         ArrayList<User> users = new ArrayList<User>();  
         for (int i = 0; i < jsonArray.size(); i++) {  
             User userM = new User();  
             user.setName(jsonArray.getJSONObject(i).getString("name"));  
             user.setpassword(jsonArray.getJSONObject(i).getString("password"));  
             user.setEmail(jsonArray.getJSONObject(i).getString("email"));  
             users.add(user);  
        }  
         for (User user : users) {  
            System.out.println(user.toString());  
        }