From b5faf1108ec4b4438496463296a6a402255f2ae7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=A9=AC=E5=AE=8F=E8=BE=BE?= <2657224306@qq.com>
Date: Thu, 4 Jan 2024 13:18:28 +0800
Subject: [PATCH] zuoye
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+## 1. 接收请求中的json数据
+
+1.添加json数据转换相关坐标
+
+```xml
+
+ com.fasterxml.jackson.core
+ jackson-databind
+ 2.11.3
+
+```
+
+2.开启自动转换json数据的支持
+
+```java
+@Configuration
+@ComponentScan("com.mdd.controller")
+// 该注解整合了多个功能,此处仅使用其中一部分功能,即json数据进行自动类型转换
+@EnableWebMvc
+public class SpringMvcConfig {
+}
+```
+
+3.设置接收json数据
+
+```java
+// 接收JSON数据
+@RequestMapping("/listJSON")
+@ResponseBody
+// @RequestParam 指明为集合,不是对象
+public String getJSON(@RequestBody List list){
+ System.out.println("JSON参数传递 ===>"+list);
+ return "ok";
+}
+```
+
+4.响应JSON数据
+
+```java
+// 响应JSON数据
+@RequestMapping("/listResponseJSON")
+@ResponseBody
+// @RequestParam 指明为集合,不是对象
+public List getResponseJSON(@RequestBody List list){
+ System.out.println("JSON参数传递 ===>"+list);
+ return list;
+}
+```
+
+@RequestParam用于接收url地址传参
+
+@RequestBody用于接收json数据
+
+5.日期类型参数传递
+
+```java
+// 时间类型
+@RequestMapping("/data")
+@ResponseBody
+// @DateTimeFormat 规定日期类型的格式
+public String getData(@DateTimeFormat(pattern = "yyyy-MM-dd") Date date){
+ System.out.println(date);
+ return "ok";
+}
+```
+
+## 2. REST风格
+
+REST(Representational State Transfer),表现形式状态转换
+
+- 传统风格资源描述形式
+ http://localhost/user/getById?id=1
+ http://localhost/user/saveUser
+
+- REST风格描述形式
+ http://localhost/user/1
+ http://localhost/user
+
+优点:隐藏资源的访问行为,无法通过地址得知对资源是何种操作书写简化
+
+### 按照REST风格访问资源时使用行为动作区分对资源进行了何种操作
+
+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(新增/保存
+
+http://localhost/users 修改用户信息 PUT(修改/更新)
+
+http://localhost/users/1 删除用户信息 DELETE(删除)
+
+
+
+案例:
+
+```java
+// 使用 REST风格简化代码
+@RestController
+//@RequestMapping("users")
+public class userController {
+
+ // 查询所有用户
+ @RequestMapping(value = "/users",method = RequestMethod.GET)
+ @ResponseBody
+ public String selectAll(){
+ System.out.println("selectAll is ok...");
+ return "selectAll is ok...";
+ }
+
+ // 新增用户
+ @RequestMapping(value = "/users",method = RequestMethod.POST)
+ @ResponseBody
+ public String save(){
+ System.out.println("user save is ok...");
+ return "user save is ok...";
+ }
+
+ // 根据id查询用户
+ @RequestMapping(value = "/users/{id}",method = RequestMethod.GET)
+ @ResponseBody
+ // @PathVariable 绑定路径参数
+ public String selectById(@PathVariable Integer id){
+ System.out.println("selectById is ok...");
+ return "selectById is ok..."+id;
+ }
+
+ // 根据id修改用户
+ @RequestMapping(value = "/users/{id}",method = RequestMethod.PUT)
+ @ResponseBody
+ // @PathVariable 绑定路径参数
+ public String updateById(@PathVariable Integer id){
+ System.out.println("updateById is ok...");
+ return "updateById is ok..."+id;
+ }
+
+ // 根据id删除用户
+ // 根据id修改用户
+ @RequestMapping(value = "/users/{id}",method = RequestMethod.DELETE)
+ @ResponseBody
+ // @PathVariable 绑定路径参数
+ public String deleteById(@PathVariable Integer id){
+ System.out.println("deleteById is ok...");
+ return "deleteById is ok..."+id;
+ }
+}
+```
--
Gitee