sping boot 基于 RESTful 风格，模拟增删改查操作

RESTful -> 
增：post  
删：delete 
改:  put
查:  get
RESTful 资源路径，一般以 s 复数结尾  

以下是代码示例：

package com.example.springboot.controller;import org.springframework.web.bind.annotation.*;@RestController
public class Hello {@RequestMapping("/hellos")//设置浏览器访问路径public String hello(){System.out.println("完成查询操作");return "模拟返回查询结果";}@RequestMapping(value = "/hellos",method = RequestMethod.POST)public void post(){System.out.println("完成新增操作");}@RequestMapping(value = "/hellos/{id}",method = RequestMethod.PUT)public void updateByID(@PathVariable Integer id){System.out.println("根据id修改记录，当前id为："+id);}@RequestMapping(value = "/hellos/{id}",method = RequestMethod.DELETE)public void deleteByID(@PathVariable Integer id){System.out.println("根据id删除记录，当前id为："+id);}}

使用 postman 发送对应请求

四个请求分别是：

get: localhost:8080/hellos

post: localhost:8080/hellos

put: localhost:8080/hellos/1

delete: localhost:8080/hellos/1

四个请求都发送后，运行结果：

2024-09-07T22:22:14.577+08:00  INFO 7396 --- [springboot] [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
2024-09-07T22:22:14.578+08:00  INFO 7396 --- [springboot] [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
2024-09-07T22:22:14.581+08:00  INFO 7396 --- [springboot] [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : Completed initialization in 2 ms
完成查询操作
完成新增操作
根据id修改记录，当前id为：1
根据id删除记录，当前id为：1

对应大量重复的注解，我们可以对其进行改造，使其可读性更好

package com.example.springboot.controller;import org.springframework.web.bind.annotation.*;@RestController
@RequestMapping("/hellos")//改造1
public class Hello {@GetMapping//改造1public String hello(){System.out.println("完成查询操作");return "模拟返回查询结果";}@PostMapping//改造2public void post(){System.out.println("完成新增操作");}@PutMapping("/{id}")//改造3public void updateByID(@PathVariable Integer id){System.out.println("根据id修改记录，当前id为："+id);}@DeleteMapping("/{id}")//改造4public void deleteByID(@PathVariable Integer id){System.out.println("根据id删除记录，当前id为："+id);}}