restful风格快速入门
restful风格入门概述简介：REST(Representational State Transfer),表现形式状态转换。
传统风格
http://localhost/users/getById?id=1
http://localhost/users/saveUser
REST风格
http://localhost/users/1
http://localhost/users
对比：
对比可以发现，虽然传统风格的更详细，知道调用哪个函数，但是了太长了写起来不方便，REST风格的话就很简介，而且还可以隐藏函数调用的函数的名字，无法通过地址得知对资源进行何种操作，更加安全。
如何区分资源访问形式
在后面的代码演示的时候就会知道，REST风格定义了很多种类的Mapping注解，通过这些注解进行识别。
http://localhost/users 查询全部用户信息 GET（查询）http://localhost/users/1 查询指定用户信息 GET（查询）http://localhost/users 添加用户信息 POST（添加/保存）http://localhost/users 修改用户信息 PUT（修改/更新）http://localhost/users 删除用户信息 DELETE（删除）规范
REST风格更多的是一种规范，对于描述模块名称通常使用复数，比如users。
快速入门文件结构
pom.xml
代码语言：javascript代码运行次数：0运行复制
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
public class User {
private Integer id;
}Controller传统代码代码语言：javascript代码运行次数：0运行复制package com.example.springbootrestful.controller;
import com.example.springbootrestful.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class UserController {
// save与update需要的是post方法才可以访问
@RequestMapping("/save")
@ResponseBody
public String save(@RequestBody User user){
System.out.println("user save..." + user);
return "{'module':'user save'}";
}
@RequestMapping("/delete")
@ResponseBody
public String delete(Integer id){
System.out.println("user delete..." + id);
return "{'module':'user delete'}";
}
@RequestMapping("/update")
@ResponseBody
public String update(@RequestBody User user){
System.out.println("user update..." + user);
return "{'module':'update save'}";
}
@RequestMapping("/getById")
@ResponseBody
public String getById(Integer id){
System.out.println("user getById..." + id);
return "{'module':'user getById'}";
}
@RequestMapping("/getAll")
@ResponseBody
public String getAll(){
System.out.println("user getAll...");
return "{'module':'user getAll'}";
}
}运行演示：
RESTful风格代码代码语言：javascript代码运行次数：0运行复制package com.example.springbootrestful.controller;
import com.example.springbootrestful.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
@Controller
public class UserController {
// save与update需要的是post方法才可以访问
@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':'update save'}";
}
@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'}";
}
}完善代码语言：javascript代码运行次数：0运行复制package com.example.springbootrestful.controller;
import com.example.springbootrestful.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
@RestController
@RequestMapping("/Users")
public class UserController {
// save与update需要的是post方法才可以访问
@PostMapping
public String save(@RequestBody User user){
System.out.println("user save..." + user);
return "{'module':'user save'}";
}
@DeleteMapping
public String delete(@PathVariable Integer id){
System.out.println("user delete..." + id);
return "{'module':'user delete'}";
}
@PutMapping
public String update(@RequestBody User user){
System.out.println("user update..." + user);
return "{'module':'update save'}";
}
@GetMapping("/{id}")
public String getById(@PathVariable Integer id){
System.out.println("user getById..." + id);
return "{'module':'user getById'}";
}
@GetMapping
public String getAll(){
System.out.println("user getAll...");
return "{'module':'user getAll'}";
}
}