Gson和FastJson区别

╰+哭是因爲堅強的太久メ 2022-05-21 04:07 123阅读 0赞

public class User {
    
        private Long user_id;
    
        private String user_name;
    
        public User() {
    
        }
    
        public User(Long userId, String name) {
            this.user_id = userId;
            this.user_name = name;
        }
    
        public Long getUser_id() {
            return user_id;
        }
    
        public void setUser_id(Long user_id) {
            this.user_id = user_id;
        }
    
        public String getUser_name() {
            return user_name;
        }
    
        public void setUser_name(String user_name) {
            this.user_name = user_name;
        }
    
        public void setAge(int age) {
    
        }
    
        public int getAge() {
            return 18;
        }
    
        public void setPwd() {
    
        }
    
        public String getPwd() {
            return "pwd";
        }
    
    }

public class GsonAndFastJsonDemo {
    
        public static void main(String[] args) {
    
            Gson gson = new Gson();
    
            String res = gson.toJson(init());
            System.out.println(res);
    
            res = JSON.toJSONString(init());
            System.out.println(res);
        }
    
        static User init() {
    
            User user = new User();
            user.setUser_id(1L);
            user.setUser_name("威少");
    
            return user;
        }
    }

结果;
        gson:{
       "user_id":1,"user_name":"威少"} 
    fastjson:{
       "age":18,"pwd":"pwd","user_id":1,"user_name":"威少"}
    
    原因是： 
    fastjson在序列化的时候, 凡是有getMethod方法,其对应属性不管是否已定义, 都能返回值。
    gson 在序列化对象的时候, 则显得很干净, 没有定义属性, 哪怕提供了getMethod, 对它也是无济于事。