总结代码如下

package com.woer.receipt_callback.controller;import cn.hutool.log.StaticLog;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.web.bind.annotation.*;/*** 总结：*  一、GetMapping 和 PostMapping 底层调用的都是：RequestMapping**  二、后端接收【普通参数】无需注解：public MyUser one(String name, Integer age) 使用（Get、Post都能传参）*      2-1：Get使用 【localhost:9081/one?name=王五&age=61】 参数拼接*      2-2：POST使用【localhost:9081/two】 方法体中写入：{"name": "李白","age": 22}**  三、后端接收【普通参数】使用注解 @RequestParam*          public MyUser five(@RequestParam(name = "name", required = false, defaultValue = "无名剑客") String name,*                             @RequestParam(name = "age", required = false, defaultValue = "1024") Integer age)*      3-1：Get使用 【localhost:9081/five?name=王五&age=61】 参数拼接*      3-2：POST使用【localhost:9081/five】 方法体中写入：{"name": "李白","age": 22}**  四、后端接收【对象】使用注解 @RequestBody*      4-1：方法体 public MyUser seven(@RequestBody MyUser user){*      4-2：post传参Json字符串 {"name": "李白","age": 22}**  五、在后端接收的方法里 @RequestBody可以和 @RequestParam同时使用，但一个方法里，@RequestBody只能有一个，@RequestParam可以有多个** @author HeJinYang* @date 2023/10/13 22:41*/
@RestController
public class RequestParamController {/*** get提交：localhost:9081/one?name=王五&age=61* 打印结果：MyUser(name=王五, age=61)*/@GetMapping("/one")public MyUser one(String name, Integer age){MyUser user = new MyUser(name, age);StaticLog.info("user：{}", user);return user;}/*** post提交：localhost:9081/two {"name": "李白","age": 22}* 打印结果：MyUser(name=李白, age=22)*/@PostMapping("/two")public MyUser two(String name, Integer age){MyUser user = new MyUser(name, age);StaticLog.info("user：{}", user);return user;}/*** get提交：localhost:9081/three?name=王五&age=61* 打印结果：No primary or single unique constructor found for class com.woer.receipt_callback.controller.tController$MyUser*/@GetMapping("/three")public MyUser three(MyUser user){StaticLog.info("user：{}", user);return user;}/*** post提交：localhost:9081/four 请求体中 {"name": "李白","age": 22}* 打印结果：No primary or single unique constructor found for class com.woer.receipt_callback.controller.tController$MyUser*/@PostMapping("/four")public MyUser four(MyUser user){StaticLog.info("user：{}", user);return user;}/*** get提交： localhost:9081/three?name=王五&age=61* post提交：localhost:9081/five 请求体中 {"name": "李白","age": 22}* 打印结果：No primary or single unique constructor found for class com.woer.receipt_callback.controller.tController$MyUser*/@RequestMapping("/five")public MyUser five(@RequestParam(name = "name", required = false, defaultValue = "无名剑客") String name,@RequestParam(name = "age", required = false, defaultValue = "1024") Integer age){MyUser user = new MyUser(name, age);StaticLog.info("user：{}", user);return user;}/*** get提交：localhost:9081/six?name=王五&age=61* post提交：请求体中 {"name": "李白","age": 22}* 打印结果：No primary or single unique constructor found for class com.woer.receipt_callback.controller.RequestParamController$MyUser*/@RequestMapping("/six")public MyUser six(@RequestParam("user") MyUser user){StaticLog.info("user：{}", user);return user;}/*** post提交：localhost:9081/seven* post提交：json {"name": "李白","age": 22}* 打印结果：*/@RequestMapping("/seven")public MyUser seven(@RequestBody MyUser user){StaticLog.info("user：{}", user);return user;}@Data@AllArgsConstructor@NoArgsConstructorstatic class MyUser{public String name;public Integer age;}
}