SpringMVC学习（二）

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样例

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package com.xiaoguan.cotroller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.Map;

@Controller
public class ScopeController {
    //使用servletAPI向request域共享对象
    @RequestMapping("/testRequstByServletAPI")
    public String testRequstByServletAPI(HttpServletRequest httpServletRequest){
        httpServletRequest.setAttribute("testRequestScope","Hello,servletAPI");
        return "success";
    }
    @RequestMapping("/testModelAndView")
    public ModelAndView testModelAndView(){
        ModelAndView modelAndView = new ModelAndView();
        //处理模型数据，即向请求域request共享数据
        modelAndView.addObject("testRequestScope","Hello,ModelAndView");
        //设置视图名称
        modelAndView.setViewName("success");
        return modelAndView;
    }
    @RequestMapping("/testModel")
    public String testModel(Model model){
        model.addAttribute("testRequestScope","Hello,Model!");
        return "success";
    }
    @RequestMapping("/testMap")
    public String testMap(Map<String,Object> map){
        map.put("testRequestScope","Hello,Map!");
        return "success";
    }
    @RequestMapping("/testModelMap")
    public String testModelMap(ModelMap modelMap){
        modelMap.put("testRequestScope","Hello,ModelMap");
        return "success";
    }
    @RequestMapping("/testSession")
    public String testSession(HttpSession session){
        session.setAttribute("testSessionScope","Hello,Session!");
        return "success";
    }
    @RequestMapping("/testApplication")
    public String testApplication(HttpSession session){
        ServletContext application = session.getServletContext();
        application.setAttribute("testApplicationScope","Hello,Application!");
        return "success";
    }
}

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package com.xiaoguan.cotroller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class TestController {
//    @RequestMapping("/")
//    public String index(){
//        return "index";
//    }
    @RequestMapping("/test_view")
    public String testView(){
        return "test_view";
    }

}

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package com.xiaoguan.cotroller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@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ID查询用户信息");
        return "success";
    }
    @RequestMapping(value = "/user",method=RequestMethod.POST)
    public String insertUser(String username,String password){
        System.out.println("添加用户信息："+username+":"+password);
        return "success";
    }
    @RequestMapping(value = "/user",method = RequestMethod.PUT)
    public String updateUser(String username,String password){
        System.out.println("修改用户信息："+username+":"+password);
        return "success";
    }

}

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package com.xiaoguan.cotroller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class ViewController {
    @RequestMapping("/testThymeleaf")
    public String testThymeleaf(){
        return "success";
    }
    @RequestMapping("/testForward")
    public String testForward(){
        return "forward:/testThymeleaf";
    }
    @RequestMapping("/testRedirect")
    public String testRedirect(){
        return "redirect:/testThymeleaf";
    }
}

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<?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">
    <context:component-scan base-package="com.xiaoguan.cotroller"></context:component-scan>
    <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>
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>
    <mvc:view-controller path="/test_rest" view-name="test_rest"></mvc:view-controller>
<!--    开启mvc的注解驱动-->
    <mvc:annotation-driven/>
</beans>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>首页</title>
    </head>
    <body>
        <h1>首页</h1>
    <a th:href="@{/testRequstByServletAPI}">通过servletAPI向requesr域共享数据</a><br>
    <a th:href="@{/testModelAndView}">通过ModelAndView向requesr域共享数据</a><br>
    <a th:href="@{/testModel}">通过Model向requesr域共享数据</a><br>
    <a th:href="@{/testMap}">通过Map向requesr域共享数据</a><br>
    <a th:href="@{/testModelMap}">通过ModelMap向requesr域共享数据</a><br>
    <a th:href="@{/testSession}">通过SessionAPI向Session域共享数据</a><br>
    <a th:href="@{/testApplication}">通过ServletContext向Application域共享数据</a><br>
    <a th:href="@{/test_view}">视图页</a><br>
    </body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>成功</title>
</head>
<body>
success<br>
<p th:text="${testRequestScope}"></p>
<p th:text="${session.testSessionScope}"></p>
<p th:text="${application.testApplicationScope}"></p>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>$Title$</title>
</head>
<body>
<a th:href="@{/user}">查询所有用户信息</a><br>
<a th:href="@{/user/1}">根据id查询用户信息</a><br>
<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="添加"><br>

</form>
<form th:action="@{/user}" method="post">
    <input type="hidden" name="_method" value="put">
    用户名： <input type="text" name="username"><br>
    密码： <input type="password" name="password"><br>
    <input type="submit" value="修改"><br>

</form>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>view</title>
</head>
<body>
<a th:href="@{/testThymeleaf}">测试ThymeleafView</a><br>
<a th:href="@{/testForward}">转发InternalResourceView网络资源视图</a><br>
<a th:href="@{/testRedirect}">重定向RedirectView</a><br>
</body>
</html>
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<?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HidenHttpMethodFilter-->
    <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>
<!--    配置springMVC的前端控制器-->
    <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>

Demo4

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package com.xiaoguan.bean;

import java.io.Serializable;
import java.util.Objects;

public class User  {
    private Integer id;
    private String username;
    private String password;
    private Integer age;
    private  String sex;

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                ", sex='" + sex + '\'' +
                '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        User user = (User) o;
        return Objects.equals(getId(), user.getId()) && Objects.equals(getUsername(), user.getUsername()) && Objects.equals(getPassword(), user.getPassword()) && Objects.equals(getAge(), user.getAge()) && Objects.equals(getSex(), user.getSex());
    }

    @Override
    public int hashCode() {
        return Objects.hash(getId(), getUsername(), getPassword(), getAge(), getSex());
    }

    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 Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public User(Integer id, String username, String password, Integer age, String sex) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.age = age;
        this.sex = sex;
    }

    public User() {
    }
}

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package com.xiaoguan.cotroller;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Paths;
import java.util.UUID;

@Controller
public class FileUpAndDownController {
    @RequestMapping("/testDown")
    public ResponseEntity<byte[]> testResponseEntity(HttpSession session) throws IOException {
        //获取ServletContext对象
        ServletContext servletContext = session.getServletContext();
        //获取服务器中文件的真实路径
        String realPath = servletContext.getRealPath("/static/img/1.jpg");
        System.out.println(realPath);
        //创建输入流
        InputStream is = new FileInputStream(realPath);
        //创建字节数组
        byte[] bytes = new byte[is.available()];
        //将流读到字节数组中
        is.read(bytes);
        //创建HttpHeaders对象设置响应头信息
        MultiValueMap<String, String> headers = new HttpHeaders();
        //设置要下载方式以及下载文件的名字
        headers.add("Content-Disposition", "attachment;filename=luckys.jpg");
        //设置响应状态码
        HttpStatus statusCode = HttpStatus.OK;
        //创建ResponseEntity对象
        ResponseEntity<byte[]> responseEntity = new ResponseEntity<>(bytes, headers, statusCode);
        //关闭输入流
        is.close();
        return responseEntity;
    }
    @RequestMapping("/testUp")
    public String testUp(MultipartFile photo ,HttpSession session ) throws IOException {
        MultipartFile photo1=photo;
        ServletContext servletContext = session.getServletContext();
        String photoPath = servletContext.getRealPath("/photo");
        String imagePath = servletContext.getRealPath("/image");
        String originalFilename = photo.getOriginalFilename();
        String suffixName=UUID.randomUUID().toString()+originalFilename.substring(originalFilename.lastIndexOf("."));
        originalFilename=suffixName;
        File photoFile = new File(photoPath);
        File imageFile = new File(imagePath);
        if(!photoFile.exists()){
            photoFile.mkdir();
        }
        if(!imageFile.exists()){
            imageFile.mkdir();
        }

        String finalPath1=photoPath+File.separator+originalFilename;
        String finalPath2=imagePath+File.separator+originalFilename;
        photo1.transferTo(Paths.get(finalPath2));
        return "success";
    }
}

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package com.xiaoguan.cotroller;

import com.xiaoguan.bean.User;
import org.springframework.http.RequestEntity;
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 org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
//@RestController标记为@Controller注解,同时为下面的每一个方法添加@ResponseBody
@Controller
public class HttpController {
    @RequestMapping(value = "/testRequestBody")
    public String testRequeestBody(@RequestBody String requestBody){
        System.out.println(requestBody);
        return "success";

    }
    @RequestMapping("/testRequestEntity")
    public String testRequestEntity(RequestEntity<String> requestEntity){
        //requestEntity表示整个报文的信息
        System.out.println(requestEntity);
        System.out.println(requestEntity.getHeaders());
        System.out.println(requestEntity.getBody());
        System.out.println(requestEntity.getMethod());
        return "success";
    }
    @RequestMapping("/testResponse")
    public void testResponse(HttpServletResponse response) throws IOException {
        response.getWriter().print("hello,response");
    }
    @RequestMapping("/testResponseBody")
    @ResponseBody
    public String testResponseBody(){

        return "success";
    }
    @RequestMapping("/testResponseUser")
    @ResponseBody
    public User testResponseUser(){
        return new User(1,"admin","123456",19,"男");
    }
    @RequestMapping("/testAxios")
    @ResponseBody
    public String testAxios(String username,String password){
        System.out.println(username+":"+password);
        return "hello,axios";
    }
}

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package com.xiaoguan.cotroller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class TestController {
    @RequestMapping("/**/testInterceptor")
    public String testInterceptor(){

        return "success";
    }
    @RequestMapping("/testExceptionHandler")
    public String testExceptionHandler(){
        System.out.println(1/0);
        return "success";
    }
}

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package com.xiaoguan.exception;

import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;

@ControllerAdvice
public class ExceptionController {
    @ExceptionHandler(value = {ArithmeticException.class, NullPointerException.class})
    public String testException(Exception e, Model model){
        model.addAttribute("ex",e);
        return "error";
    }
}

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package com.xiaoguan.interceptor;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class FirstInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("preHandle");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterHandle");
    }
}

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package com.xiaoguan.interceptor;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class SecondInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("sssspreHandle");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("sssspostHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("ssssafterHandle");
    }
}

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<?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">
    <context:component-scan base-package="com.xiaoguan"></context:component-scan>
    <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>
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>
    <mvc:view-controller path="/file" view-name="file"></mvc:view-controller>
    <mvc:default-servlet-handler/>
<!--    开启mvc的注解驱动-->
    <mvc:annotation-driven/>
<!--    配置文件上传解析器,将上传的文件封装成MutipartFile文件对象-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"></bean>
<!--    配置拦截器-->
<!--    <mvc:interceptors>-->
<!--&lt;!&ndash;        <bean class="com.xiaoguan.interceptor.FirstInterceptor"></bean>&ndash;&gt;-->
<!--&lt;!&ndash;        <ref bean="firstInterceptor"></ref>&ndash;&gt;-->
<!--&lt;!&ndash;        <mvc:interceptor>&ndash;&gt;-->
<!--&lt;!&ndash;            <mvc:mapping path="/**"/>&ndash;&gt;-->
<!--&lt;!&ndash;            <mvc:exclude-mapping path="/"/>&ndash;&gt;-->
<!--&lt;!&ndash;            <ref bean="firstInterceptor"/>&ndash;&gt;-->
<!--&lt;!&ndash;        </mvc:interceptor>&ndash;&gt;-->
<!--        <ref bean="secondInterceptor"/>-->
<!--        <ref bean="firstInterceptor"/>-->


<!--    </mvc:interceptors>-->
<!--    配置异常处理-->
<!--    <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">-->
<!--        <property name="exceptionMappings">-->
<!--            <props>-->
<!--                <prop key="java.lang.ArithmeticException">error</prop>-->
<!--            </props>-->
<!--        </property>-->
<!--        <property name="exceptionAttribute" value="ex"></property>-->
<!--    </bean>-->
</beans>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>$Title$</title>
</head>
<body>
<h1>出现错误</h1>
<!--将异常信息设置在请求域中-->
<p th:text="${ex}"></p>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>测试文件上传和下载</title>
</head>
<body>
<a th:href="@{/testDown}">下载lucky.jpg</a>
<form th:action="@{/testUp}" method="post" enctype="multipart/form-data">
    头像:<input type="file" name="photo"><br>
    <input type="submit" value="上传">
</form>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
<h1>首页</h1>
<form th:action="@{/testRequestBody}" method="post">
    <input type="text" name="username" ><br>
    <input type="text" name="password" ><br>
    <input type="submit" value="测试@RequestBody注解" >
</form>
<form th:action="@{/testRequestEntity}" method="post">
    <input type="text" name="username" ><br>
    <input type="text" name="password" ><br>
    <input type="submit" value="测试@RequestEntity注解" >
</form>
<a th:href="@{/testResponse}">通过servletAPI来测试response.getWriter</a><br>
<a th:href="@{/testResponseBody}">通过注解ResponseBody来完成返回响应</a><br>
<a th:href="@{/testResponseUser}">通过注解ResponseBody来完成返回User响应</a><br>
<a th:href="@{/file}">file页面</a><br>

<div id="app">
    <a @click="testAxios" th:href="@{/testAxios}">SpringMVC来处理ajax</a>
</div>
<script type="text/javascript" th:src="@{/static/js/Vue.js}"></script>
<script type="text/javascript" th:src="@{/static/js/axios.js}"></script>
<script type="text/javascript">
    new Vue({
        el:"#app",
        methods:{
            testAxios:function (event){
                axios({
                    method:"post",
                    url:event.target.href,
                    params:{
                        username:"admin",
                        password:"123456"
                    }
                }).then(function (response){
                    alert(response.data)
                });
                event.preventDefault();

            }
        }
    })
</script>
<h1>拦截器</h1>
<a th:href="@{/testInterceptor}">测试拦截器</a>
<a th:href="@{/testExceptionHandler}">测试异常处理</a>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>成功</title>
</head>
<body>
<h1>成功</h1>
</body>
</html>
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<?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HidenHttpMethodFilter-->
    <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>
    <!--    配置springMVC的前端控制器-->
    <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>

注解

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package com.xiaoguan.config;

import org.springframework.context.annotation.Configuration;

@Configuration
public class SpringConfig {
}

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package com.xiaoguan.config;

import com.xiaoguan.interceptor.TestInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.*;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;
import org.thymeleaf.spring5.SpringTemplateEngine;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ITemplateResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;

import java.util.List;
import java.util.Properties;
//用来代替springMVC的配置文件

@Configuration
//1.扫描组件
@ComponentScan("com.xiaoguan")
//5.开启MVC注解驱动
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {
    //3.配置生成模板解析器
    @Bean
    public ITemplateResolver templateResolver() {
        WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
        // ServletContextTemplateResolver需要一个ServletContext作为构造参数，可通过WebApplicationContext 的方法获得
        ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver(
                webApplicationContext.getServletContext());
        templateResolver.setPrefix("/WEB-INF/templates/");
        templateResolver.setSuffix(".html");
        templateResolver.setCharacterEncoding("UTF-8");
        templateResolver.setTemplateMode(TemplateMode.HTML);
        return templateResolver;
    }

    //3.生成模板引擎并为模板引擎注入模板解析器
    @Bean
    public SpringTemplateEngine templateEngine(ITemplateResolver templateResolver) {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(templateResolver);
        return templateEngine;
    }

    //3.生成视图解析器并未解析器注入模板引擎
    @Bean
    public ViewResolver viewResolver(SpringTemplateEngine templateEngine) {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
        viewResolver.setCharacterEncoding("UTF-8");
        viewResolver.setTemplateEngine(templateEngine);
        return viewResolver;
    }
    //3.配置view-controller
    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/hello").setViewName("hello");
    }

    //8.拦截器
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        TestInterceptor testInterceptor = new TestInterceptor();
        registry.addInterceptor(testInterceptor).addPathPatterns("/**");
    }

    //4.配置default-servlet-handler
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
    //7.配置异常处理
    @Override
    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {
        SimpleMappingExceptionResolver simpleMappingExceptionResolver = new SimpleMappingExceptionResolver();
        Properties prop=new Properties();
        prop.setProperty("java.lang.ArithmeticException","error");
        simpleMappingExceptionResolver.setExceptionMappings(prop);
        simpleMappingExceptionResolver.setExceptionAttribute("exception");
        resolvers.add(simpleMappingExceptionResolver);
    }

    //6.配置文件解析器
    @Bean
    public MultipartResolver multipartResolver(){
        CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver();
        return commonsMultipartResolver;
    }
}

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package com.xiaoguan.config;

import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.filter.HiddenHttpMethodFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

import javax.servlet.Filter;

public class WebInit extends AbstractAnnotationConfigDispatcherServletInitializer {
    //指定spring的配置类
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{SpringConfig.class};
    }
    //指定springMVC的配置类

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{WebConfig.class};
    }
    //指定DispacherServlet的映射规则，则url-pattern
    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
    //创建过滤器,注册过滤器
    @Override
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding("UTF-8");
        characterEncodingFilter.setForceResponseEncoding(true);
        HiddenHttpMethodFilter hiddenHttpMethodFilter = new HiddenHttpMethodFilter();
        return new Filter[]{characterEncodingFilter,hiddenHttpMethodFilter};
    }
}

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package com.xiaoguan.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class TestController {
    @RequestMapping("/")
    public String index(){
        return "index";
    }
}

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package com.xiaoguan.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class TestInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("preHandle执行了");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>$Title$</title>
</head>
<body>
<h1>你好</h1>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
<h1>首页</h1>
</body>
</html>
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<?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">
</web-app>

rest

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package com.xiaoguan.bean;

public class Employee {

    private Integer id;
    private String lastName;

    private String email;
    //1 male, 0 female
    private Integer gender;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public Integer getGender() {
        return gender;
    }

    public void setGender(Integer gender) {
        this.gender = gender;
    }

    public Employee(Integer id, String lastName, String email, Integer gender) {
        super();
        this.id = id;
        this.lastName = lastName;
        this.email = email;
        this.gender = gender;
    }

    public Employee() {
    }
}


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package com.xiaoguan.controller;

import com.xiaoguan.bean.Employee;
import com.xiaoguan.dao.EmployeeDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import java.util.Collection;

@Controller
public class EmployeeController {
    @Autowired
    private EmployeeDao employeeDao;
    @GetMapping("/employee")
    public String getAllEmployee(Model model){
        Collection<Employee> employeeDaoList = employeeDao.getAll();
        model.addAttribute("employeeDaoList",employeeDaoList);
        return "employee_list";
    }
    @RequestMapping(value = "/employee/{id}",method = RequestMethod.DELETE)
    public String deleteEmploy(@PathVariable("id") Integer id){
        employeeDao.delete(id);
        return "redirect:/employee";
    }
    @RequestMapping(value = "/employee",method = RequestMethod.POST)
    public String addEmployee(Employee employee){
        employeeDao.save(employee);
        return "redirect:/employee";
    }
    @RequestMapping(value = "/employee/{id}",method = RequestMethod.GET)
    public String getEmployeeById(@PathVariable("id")Integer id,Model model){
        Employee employee = employeeDao.get(id);
        model.addAttribute("employee",employee);
        return "employee_update";
    }
    @PutMapping("/employee")
    public String updateEmployee(Employee employee){
        employeeDao.save(employee);
        return "redirect:/employee";
    }
}

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package com.xiaoguan.dao;

import com.xiaoguan.bean.Employee;
import org.springframework.stereotype.Repository;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

@Repository
public class EmployeeDao {

    private static Map<Integer, Employee> employees = null;

    static{
        employees = new HashMap<Integer, Employee>();

        employees.put(1001, new Employee(1001, "E-AA", "aa@163.com", 1));
        employees.put(1002, new Employee(1002, "E-BB", "bb@163.com", 1));
        employees.put(1003, new Employee(1003, "E-CC", "cc@163.com", 0));
        employees.put(1004, new Employee(1004, "E-DD", "dd@163.com", 0));
        employees.put(1005, new Employee(1005, "E-EE", "ee@163.com", 1));
    }

    private static Integer initId = 1006;

    public void save(Employee employee){
        if(employee.getId() == null){
            employee.setId(initId++);
        }
        employees.put(employee.getId(), employee);
    }

    public Collection<Employee> getAll(){
        return employees.values();
    }

    public Employee get(Integer id){
        return employees.get(id);
    }

    public void delete(Integer id){
        employees.remove(id);
    }
}
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<?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">
    <context:component-scan base-package="com.xiaoguan"/>
    <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>
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>
    <mvc:view-controller path="/toAdd" view-name="employee_add"></mvc:view-controller>
<!--    开放对静态资源的访问-->
    <mvc:default-servlet-handler/>
    <mvc:annotation-driven/>
</beans>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>添加员工</title>
</head>
<body>
<form th:action="@{/employee}" method="post">
    lastName:<input type="text" name="lastName"><br>
    email:<input type="text" name="email"><br>
    gender:<input type="radio" name="gender" value="1">male<input type="radio" name="gender" value="0">female<br>
    <input type="submit" value="提交"><br>
</form>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>员工信息</title>
</head>
<body>
<table border="1" cellspacing="0" cellpadding="0" style="test-align:center" id="dataTable">
    <tr>
        <th colspan="5">员工信息</th>
    </tr>
    <tr>
        <th>id</th>
        <th>lastName</th>
        <th>email</th>
        <th>gender</th>
        <th>options <a th:href="@{/toAdd}">添加</a> </th>
    </tr>
    <tr th:each="employee :${employeeDaoList}">
        <td th:text="${employee.id}"></td>
        <td th:text="${employee.lastName}"></td>
        <td th:text="${employee.email}"></td>
        <td th:text="${employee.gender}"></td>
        <td>
            <a @click="deleteEmployee" th:href="@{/employee/}+${employee.id}">删除</a>
            <a th:href="@{'/employee/'+${employee.id}}">更新</a>
        </td>
    </tr>
</table>
<form id="deleteForm"  method="post">
    <input type="hidden" name="_method" value="delete">
</form>
<script type="text/javascript" th:src="@{/static/js/Vue.js}"></script>
<script type="text/javascript" >
    var vue=new Vue({
        el:"#dataTable",
        methods:{
            deleteEmployee:function (event){
                var deleteForm = document.getElementById("deleteForm");
                deleteForm.action=event.target.href;
                deleteForm.submit();
                //取消超链接的默认行为
                event.preventDefault();
            }
        }
    })
</script>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>更新</title>
</head>
<body>
<form th:action="@{/employee}" method="post">
    <input type="hidden" name="_method" th:value="put">
    <input type="hidden" name="id" th:value="${employee.id}">
    lastName:<input type="text" name="lastName" th:value="${employee.lastName}"><br>
    email:<input type="text" name="email"th:value="${employee.email}"><br>
    gender:<input type="radio" name="gender" value="1" th:field="${employee.gender}">male
    <input type="radio" name="gender" value="0" th:field="${employee.gender}">female<br>
    <input type="submit" value="更新"><br>
</form>
</body>
</html>
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<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
<h1>首页</h1>
<a th:href="@{/employee}">查看员工信息</a>
</body>
</html>
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<?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">
    <filter>
        <filter-name>CharacterEncodingFilte</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>CharacterEncodingFilte</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <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>
    <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>