【java、springMVC】REST风格

描述访问网络资源的格式

传统风格：http://localhost/user/saveUser

rest风格：http://localhost/user

优点

1.隐藏资源访问行为（用行为动作区分操作）

2.书写简化

注解解释

@RequestMapping

@PathVariable 

@RestController 

简化开发注解 

入门案例（最基础，有不合理）

@RequestMapping(value = "/users", method = RequestMethod.POST)
    @ResponseBody
    public String save(@RequestBody User user) {
        System.out.println("user save " + user);
        return "{'module':'user save'}";
    }
 
    @RequestMapping(value = "/users/{id}", method = RequestMethod.DELETE)
    @ResponseBody
    public String delete(@PathVariable Integer id) {
        System.out.println("user delete " + id);
        return "{'module':'user delete'}";
    }
 
    @RequestMapping(value = "/users", method = RequestMethod.PUT)
    @ResponseBody
    public String update(@RequestBody User user) {
        System.out.println("user update " + user);
        return "{'module':'user update'}";
    }
 
    @RequestMapping(value = "/users/{id}",method = RequestMethod.GET)
    @ResponseBody
    public String getById(@PathVariable Integer id) {
        System.out.println("user getById " + id);
        return "{'module':'user getById'}";
    }
 
    @RequestMapping(value = "/users",method = RequestMethod.GET)
    @ResponseBody
    public String getAll() {
        System.out.println("user getAll ");
        return "{'module':'user getAll'}";
    }

快速开发

package org.example.controller;/*
 * @Auther:huangzhiyang
 * @Date:2023/10/7
 * @Description:
 */
 
import org.example.domain.Book;
import org.springframework.web.bind.annotation.*;
 
@RestController
@RequestMapping("/book")
public class BookController {
   @PostMapping
    public String save(@RequestBody Book book) {
        System.out.println("book save "+book);
        return "{'info':'springmvc'}";
    }
    @DeleteMapping("/{id}")
    public String delete( @PathVariable String id) {
        System.out.println("book delete"+id);
        return "{'info':'springmvc'}";
    }
   @PutMapping
    public String update(@RequestBody Book book) {
        System.out.println("book update");
        return "{'info':'springmvc'}";
    }
}