一、什么是restFul设计?

二、restFul有什么用？

 restFul编程：通过相同的请求路径，但是给方法设置不同的请求方式，来调用不同的方法

三、代码部分

项目目录

1、UserInfo.java

package com.qingruan.bean;

public class UserInfo {
    private String name;
    private String phone;
    private int age;

    public UserInfo() {
    }

    @Override
    public String toString() {
        return "UserInfo{" +
                "name='" + name + '\'' +
                ", phone='" + phone + '\'' +
                ", age=" + age +
                '}';
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

2、RestFulController.java

package com.qingruan.servlet;

import com.qingruan.bean.UserInfo;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;

@Controller
@RequestMapping("/restful")
public class RestFulController {

    @PostMapping
    public void post(@RequestBody UserInfo userInfo){
        System.out.println(userInfo);
        System.out.println("保存成功");
    }

    //可以将URL路径占位符参数{}取出，给变量赋值
    @PutMapping("/{id}")
    public void patch(@PathVariable("id") Integer id,@RequestBody UserInfo userInfo){
        System.out.println(id);
        System.out.println(userInfo);
        System.out.println("修改成功");

    }

    @GetMapping("/{id}")
    @ResponseBody
    public UserInfo get(@PathVariable("id") Integer id){
        System.out.println("根据id查询:"+id);
        UserInfo userInfo=new UserInfo();
        userInfo.setName("jack");
        userInfo.setAge(22);
        userInfo.setPhone("138989898");
        return userInfo;
    }

    @DeleteM