From a62348f97e2c95a4d7fee1d3dd1ec79b9e919819 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E6=9D=8E=E8=88=92=E6=B1=B6?= <3228916049@qq.com> Date: Thu, 4 Jan 2024 14:08:24 +0000 Subject: [PATCH] =?UTF-8?q?=E4=BD=9C=E4=B8=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: 李舒汶 <3228916049@qq.com> --- .../20240104REST\347\254\224\350\256\260.md" | 325 ++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 "49 \346\235\216\350\210\222\346\261\266/20240104REST\347\254\224\350\256\260.md" diff --git "a/49 \346\235\216\350\210\222\346\261\266/20240104REST\347\254\224\350\256\260.md" "b/49 \346\235\216\350\210\222\346\261\266/20240104REST\347\254\224\350\256\260.md" new file mode 100644 index 0000000..a37c1dd --- /dev/null +++ "b/49 \346\235\216\350\210\222\346\261\266/20240104REST\347\254\224\350\256\260.md" @@ -0,0 +1,325 @@ +## 笔记 + +REST简介 + +REST（Representational State Transfer） + +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 + +名称：@RequestMapping + +类型：方法注解 + +位置：SpringMVC控制器方法定义上方 + +作用：设置当前控制器方法请求访问路径 + +属性 + +value（默认）：请求访问路径 + +method：http请求动作，标准动作（GET/POST/PUT/DELETE） + +名称：@PathVariable + +类型：形参注解 + +位置：SpringMVC控制器方法形参定义前面 + +作用：绑定路径参数与处理器方法形参间的关系，要求路径参数名与形参名一一对应 + +@RequestBody @RequestParam @PathVariable + +区别 + +@RequestParam用于接收url地址传参或表单传参 + +@RequestBody用于接收json数据 + +@PathVariable用于接收路径参数，使用{参数名称}描述路径参数 + +应用 + +后期开发中，发送请求参数超过1个时，以json格式为主,@RequestBody应用较广 + +如果发送非json格式数据，选用@RequestParam接收请求参数采用RESTful进行开发，当参数数量较少时，例如1个， + +可以采用@PathVariable接收请求路径变量，通常用于传递id值 + +## 作业 + +pom.xml + +```xml + + 4.0.0 + com.xlu + ssmvc03 + war + 1.0-SNAPSHOT + + + + org.springframework + spring-webmvc + 5.2.25.RELEASE + + + javax.servlet + javax.servlet-api + 3.1.0 + + provided + + + + + com.fasterxml.jackson.core + jackson-databind + 2.11.3 + + + + + + + + org.apache.tomcat.maven + tomcat7-maven-plugin + 2.2 + + 80 + / + + utf-8 + + + + + + + +``` + +src/main/java/com/xlu/controller/UserController.java + +```java +package com.xlu.controller; + +import com.xlu.admin.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; + +import java.util.Arrays; +import java.util.List; + +@Controller +public class UserController { + + //接受用户名和慢慢，登录 + @RequestMapping("/login") + @ResponseBody + public String login(User user){ + + String result = "login error"; + if ("admin".equals(user.getUsername())&&"123456".equals(user.getPassword())) { + result = "login success"; + } + return result;//输入用户名admin，密码123456，显示结果巍峨login success + } + + //模拟注册 + @RequestMapping(value = "/reg",produces = "text/html;charset=utf-8")//解决返回的中文乱码问题 + @ResponseBody + public String reg(User user){ + + System.out.println(user); + + return "注册成功！"; + } + + //json集合 + @RequestMapping("/jsonArray") + @ResponseBody + public String jsonData(@RequestBody List names){ + + System.out.println(names); + + return "ok"; + } + +// JSON数组 + @RequestMapping("/jsonArray2") + @ResponseBody + public String jsonData2(@RequestBody String[] names){ + + System.out.println(Arrays.toString(names)); + + return "ok"; + } + +// json对象 + @RequestMapping("/userJson") + @ResponseBody + public String jsonUser(@RequestBody User user){ + System.out.println(user); + return user.toString(); + } + + @RequestMapping("/userJson2") + @ResponseBody + public String jsonUser2(@RequestBody List user){ + System.out.println(user); + return user.toString(); + } + + +} + +``` + +src/main/java/com/xlu/config/WebConfig.java + +```java +package com.xlu.config; + +import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; + +public class WebConfig extends AbstractAnnotationConfigDispatcherServletInitializer { + protected Class[] getRootConfigClasses() { + return new Class[0]; + } + + protected Class[] getServletConfigClasses() { + return new Class[]{SpringMvcConfig.class}; + } + + protected String[] getServletMappings() { + return new String[]{"/"}; + } +} + +``` + +src/main/java/com/xlu/config/SpringMvcConfig.java + +```java +package com.xlu.config; + +import org.springframework.context.annotation.ComponentScan; +import org.springframework.context.annotation.Configuration; +import org.springframework.web.servlet.config.annotation.EnableWebMvc; + +@Configuration +@ComponentScan("com.xlu.controller") +@EnableWebMvc +public class SpringMvcConfig { +} + +``` + +src/main/java/com/xlu/admin/User.java + +```java +package com.xlu.admin; + +public class User { + + private Integer id; + private String username; + private String password; + private Address address; + + @Override + public String toString() { + return "User{" + + "id=" + id + + ", username='" + username + '\'' + + ", password='" + password + '\'' + + ", address=" + address + + '}'; + } + + public Integer getId() { + return id; + } + + public void setId(Integer id) { + this.id = id; + } + + public String getUsername() { + return username; + } + + public void setUsername(String username) { + this.username = username; + } + + public String getPassword() { + return password; + } + + public void setPassword(String password) { + this.password = password; + } + + public Address getAddress() { + return address; + } + + public void setAddress(Address address) { + this.address = address; + } + + public User(Integer id, String username, String password, Address address) { + this.id = id; + this.username = username; + this.password = password; + this.address = address; + } + + public User() { + } +} + +``` + +src/main/java/com/xlu/admin/Address.java + +```java +package com.xlu.admin; + +public class Address { + private String city; + + @Override + public String toString() { + return "Address{" + + "city='" + city + '\'' + + '}'; + } + + public String getCity() { + return city; + } + + public void setCity(String city) { + this.city = city; + } + + public Address(String city) { + this.city = city; + } + + public Address() { + } +} +``` -- Gitee