SpringMVC学习（八）：使用RESTFul模拟操作用户数据资源

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
 
 
<!--    开启组件扫描-->
    <context:component-scan base-package="demo.controller"></context:component-scan>
 
    <!-- 配置Thymeleaf视图解析器 -->
    <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
 
                        <!-- 视图前缀 -->
                        <property name="prefix" value="/WEB-INF/templates/"/>
 
                        <!-- 视图后缀 -->
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    </bean>
                </property>
            </bean>
        </property>
    </bean>
 
 
<!--    视图控制器，没有控制器也可以跳转到首页，适用于仅仅用来实现页面跳转，没有任何请求处理的过程-->
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>
<!--    开启mvc的注解驱动-->
    <mvc:annotation-driven></mvc:annotation-driven>
 
    <mvc:view-controller path="/test_rest" view-name="test_rest"></mvc:view-controller>
 
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
 
 
    //配置编码过滤器
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
 
    //配置springMVC的前端控制器DispatcherServlet
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springMVC.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
</web-app>

package demo.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
 
/**
 * RESTFul模拟用户资源的增删改查
 *
 * /user    GET     查询所有用户信息
 * /user/1  GET     根据用户id查询信息
 * /user    POST    添加用户信息
 * /user    PUT     修改用户信息
 * /user    DELETE  删除所有用户信息
 * /user/1  DELETE  根据id删除用户信息
 */
@Controller
public class UserController {
 
    @RequestMapping(value = "/user",method = RequestMethod.GET)
    public String getAllUser(){
        System.out.println("查询所有用户信息");
        return "success";
    }
 
    @RequestMapping(value = "/user/{id}",method = RequestMethod.GET)
    public String getUserById(){
        System.out.println("根据用户id查询信息");
        return "success";
    }
 
    @RequestMapping(value = "/user",method = RequestMethod.POST)
    public String addUser(String username,String password){
        System.out.println("添加用户信息成功，用户名："+username+" 密码："+password);
        return "success";
    }
}

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
 
    <a th:href="@{/user}">查询所有用户信息</a>
    <a th:href="@{/user/1}">根据id查询用户信息</a>
 
    <form th:action="@{user}" method="post">
        用户名： <input type="text" name="username">    <br>
        密  码： <input type="password" name="password">    <br>
        <input type="submit" value="增加">    <br>
 
    </form>
</body>
</html>

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
 
    success
    
</body>
</html>

<!--    配置HiddenHttpMethodFilter-->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

@RequestMapping(value = "/user",method = RequestMethod.PUT)
    public String updateUser(String username,String password){
        System.out.println("修改用户信息成功，用户名："+username+" 密码："+password);
        return "success";
    }
 
    @RequestMapping(value = "/user/{id}",method = RequestMethod.DELETE)
    public String deleteUser(String username){
        System.out.println("删除用户信息成功，用户名："+username);
        return "success";
    }