@RequestBody ， 需要使用 传入 json格式，

专门为了application/json和application/xml等设置的

• 会自动装配到 实体类中

  • 代码

        @RequestMapping(value="test3",method = RequestMethod.POST)
        public void test3(@RequestBody UserDto userDto){
    //          from-data 报错 415
    //        x-www-form-uriencodéd 报错 415
    //        json 报错  400
            System.out.println(userDto);
        }
    

    **package com.example.hello_reqquestparam.common.dto;
    
    public class UserDto {
        private String name;
        private String password;
        private int age;
    
        public int getAge() {
            return age;
        }
    
        @Override
        public String toString() {
            return "UserDto{" +
                    "name='" + name + '\'' +
                    ", password='" + password + '\'' +
                    ", age=" + age +
                    '}';
        }
    
        public void setAge(int age) {
            this.age = age;
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    }**
    
    

    

• 一般用于 post 请求