HttpMessageConverter代码
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SpringMVC Code

356 字
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17 分钟

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>top.qaqaq.mvc</groupId>
  <artifactId>SpringMVC_demo4</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>SpringMVC_demo4 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>

    <!-- SpringMVC -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.3.1</version>
    </dependency>
    <!-- 日志 -->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.2.3</version>
    </dependency>
    <!-- ServletAPI -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- Spring5和Thymeleaf整合包 -->
    <dependency>
      <groupId>org.thymeleaf</groupId>
      <artifactId>thymeleaf-spring5</artifactId>
      <version>3.0.12.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.12.1</version>
    </dependency>

  </dependencies>
  <build>
    <finalName>SpringMVC_demo4</finalName>
  </build>
</project>

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>

  <!-- 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>

  <!-- 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>

springMVC.xml

<?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">

    <!--扫描组件-->
    <context:component-scan base-package="top.qaqaq.mvc.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>

    <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 />

</beans>

controller

HttpController .java

package top.qaqaq.mvc.controller;

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 top.qaqaq.mvc.bean.User;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author RichieZhang
 * @create 2022-12-29 18:49
 */

@Controller
public class HttpController {

    @RequestMapping("/testRequestBody")
    public String testRequestBody(@RequestBody String requestBody) {
        System.out.println("requestBody: " + requestBody);
        return "success";
    }

    @RequestMapping("/testRequestEntity")
    public String testRequestEntity(RequestEntity<String> requestEntity) {
        //当前requestEntity表示整个请求报文的信息
        System.out.println("请求头：" + requestEntity.getHeaders());
        System.out.println("请求体：" + requestEntity.getBody());
        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(1001, "admin", "123456", 23, "男");
    }

    @RequestMapping("/testAxios")
    @ResponseBody
    public String testAxios(String username, String password) {
        System.out.println(username + "," + password);
        return "hello,axios";
    }

}

bean

User .java

package top.qaqaq.mvc.bean;

/**
 * @author RichieZhang
 * @create 2022-12-29 19:50
 */
public class User {

    private Integer id;
    private String username;
    private String password;
    private Integer age;
    private String sex;

    public User() {
    }

    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 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;
    }
}

引入vue.js和axios.min.js

index.html

<!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">
        <input type="password" name="password">
        <input type="submit" value="测试@RequestBody">
    </form>
    <form th:action="@{/testRequestEntity}" method="post">
        <input type="text" name="username">
        <input type="password" name="password">
        <input type="submit" value="测试RequestEntity">
    </form>
    <a th:href="@{/testResponse}">通过servletAPI的response对象响应浏览器数据</a><br/>
    <a th:href="@{/testResponseBody}">通过@responseBody响应浏览器数据</a><br/>
    <a th:href="@{/testResponseUser}">通过@responseBody响应浏览器User对象</a><br/>
    <div id="app">
        <a @click="testAxios" th:href="@{/testAxios}">SpringMVC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.min.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>
</body>
</html>

success.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>success</h1>
</body>
</html>
SpringMVC
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