SpringMVC快速学习

已于 2023-07-04 23:16:35 修改
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分类专栏： 后端框架 文章标签： 学习
于 2023-07-04 23:09:10 首次发布
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本文链接：https://blog.youkuaiyun.com/weixin_45864704/article/details/131545194
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本文详细介绍了SpringMVC的配置过程，包括pom.xml、springmvc.xml、web.xml的配置，以及DispatcherServlet的注册。此外，还讨论了项目发布、数据提交（表单、对象封装、动态占位符、不同参数名称、原始方法）和中文编码设置。最后，提到了Ajax请求的实现，包括返回JSON数组的功能。

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一、SSM框架优化的方向

image-20230607195031180 image-20230607195833541

目录结构：

image-20230607200249644

二、前期文件配置

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.itheima</groupId>
  <artifactId>springmvc_001_demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
	<dependencies>
		<!--springmvc依赖-->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>5.2.5.RELEASE</version>
		</dependency>
		<!--servlet依赖-->
		<dependency>
		    <groupId>javax.servlet</groupId>
		    <artifactId>javax.servlet-api</artifactId>
		    <version>3.1.0</version>
		    <scope>provided</scope>
		</dependency>
	</dependencies>
	
	<build>
    	<finalName>maven.plugins</finalName>
    	<pluginManagement>
    	<plugins>
    		<plugin>
        		<groupId>org.apache.maven.plugins</groupId>
        		<artifactId>maven-war-plugin</artifactId>
        		<version>3.3.1</version>
      		</plugin>
    	</plugins>    
    	</pluginManagement>    
    	
    	<resources>
			<resource>
				<directory>${basedir}/src/main/java</directory>
				<includes>
					<include>**/*.xml</include>
					<include>**/*.properties</include>
				</includes>
			</resource>
			<resource>
				<directory>${basedir}/src/main/resources</directory>
				<includes>
					<include>**/*.xml</include>
					<include>**/*.properties</include>
				</includes>
			</resource>
		</resources> 
	</build>
</project>

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:p="http://www.springframework.org/schema/p"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
  http://www.springframework.org/schema/context
  http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 
  
  
  <context:component-scan base-package="com.itheima.controller" />

 
    <!--配置spring创建容器时要扫描的包-->
    <context:component-scan base-package="com.itheima.controller"></context:component-scan>
 
<!--     处理映射器
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
    处理器适配器
    <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/>
 -->
 
    <!--配置视图解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    	<!-- 配置前缀 -->
        <property name="prefix" value="/WEB-INF/admin/"/>
        <!-- 配置后缀 -->
        <property name="suffix" value=".jsp"/>
    </bean>
	
    <!--配置spring开启注解mvc的支持  默认就是开启的 ，要想让其他组件（不包含映射器、适配器、处理器）生效就必须需要配置了-->

</beans>

（很重要）为什么要注册DispatcherServlet

image-20230607204053006 image-20230607204540681

web.xml

<?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">
 
 
 	<!-- 注册SpringMVC框架 -->
 	<servlet>
 		<servlet-name>springmvc</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>
 	</servlet>
 	<servlet-mapping>
 		<servlet-name>springmvc</servlet-name>
 		<url-pattern>*.action</url-pattern>
 	</servlet-mapping>
</web-app>

三、项目发布

image-20230607212308031 image-20230607212358199 image-20230607212440163

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<%--${pageContext.request.contextPath}的意思是/项目名称，比如这个项目：/springmvc_001_demo，这个/表示http://localhost:8080/--%>
	<a href="${pageContext.request.contextPath}/demo.action">访问服务器</a>
	<a>${pageContext.request.contextPath}</a>
</body>
</html>

main.jsp

image-20230607213639014

controller1.java

package com.itheima.controller;

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

@Controller
public class controller1 {
	@RequestMapping("/demo")
	public String demo() {
		System.out.println("服务器访问到了");
		return "main";
	}
	
}

这里加上springmvc之后image-20230607213808190

image-20230607213842863

跳转之后：

image-20230607213856313

四、springmvc项目搭建流程再来一遍

创建javaweb工程

image-20230607223310144 image-20230607223328189

或者建Maven项目也可以，总之，下面这个目录结构不能错

image-20230607223626153

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.itheima</groupId>
  <artifactId>springmvc_002_datasubmit</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>springmvc_002_datasubmit</name>
  <packaging>war</packaging>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.target>1.8</maven.compiler.target>
    <maven.compiler.source>1.8</maven.compiler.source>
      <junit.version>5.9.1</junit.version>
      </properties>

  <dependencies>
      <!--servlet依赖-->
      <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
          <scope>provided</scope>
      </dependency>
      <!--springmvc依赖-->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>5.2.5.RELEASE</version>
      </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-engine</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>      </dependencies>

    <build>
        <finalName>maven.plugins</finalName>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.3.1</version>
                </plugin>
            </plugins>
        </pluginManagement>

        <resources>
            <resource>
                <directory>${basedir}/src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
            <resource>
                <directory>${basedir}/src/main/resources</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
        </resources>
    </build>
</project>

resources/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">

	<!--包扫描-->
    <context:component-scan base-package="com.itheima.controller"></context:component-scan>
    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/admin/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

webapp/WEB-INF/web.xml 注册springmvc框架

<?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">

    <!--springmvc注册-->
    <servlet>
        <servlet-name>springmvc</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>
    </servlet>
    <servlet-mapping><!--根据请求的路由，查询是否有处理请求的方法（根据@RequestMapping）-->
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>
    <!--springmvc注册-->
    
</web-app>
image-20230607224518491

五、数据提交方式

1、form表单提交

DataController.java

package com.itheima.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Description:
 * date: 2023/6/8 21:40
 *  参数名与jsp传入的变量名要一致
 * @since JDK 11
 */
@Controller
public class DataController {
	@RequestMapping(value = "/one")
	public String dataSubmit(String name, String pw){
		System.out.printf(name+" "+pw);
		return "login";
	}
}

index.jsp

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
  <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %></h1>
<br/>
<form action="${pageContext.request.contextPath}/one.action">
  name:<input type="text" name="name"><br/>
  password:<input type="password" name="pw"><br/>
  <input type="submit" value="提交">
</form>
</body>
</html>

login.jsp

<%--
  Created by IntelliJ IDEA.
  User: xiaoshiguang
  Date: 2023/6/7
  Time: 22:25
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h2>hello</h2>
</body>
</html>

2、对象封装提交数据

index.jsp

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
  <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %></h1>
<br/>
<form action="${pageContext.request.contextPath}/one.action">
  name:<input type="text" name="name"><br/>
  password:<input type="password" name="pw"><br/>
  <input type="submit" value="提交">
</form>
<h3>封装成实体类进行数据的提交</h3>
<%--要求name的属性值与实体类对象的成员变量的值相同--%>
<form action="${pageContext.request.contextPath}/two.action" method="get">
  name:<input type="text" name="name"><br/>
  age:<input type="text" name="age"><br/>
  <input type="submit" value="提交">
</form>
</body>
</html>
image-20230608220810061

必须一致

实体类：User.java，需要有get和set方法

package com.itheima.domain;

/**
 * Description:
 * date: 2023/6/8 22:02
 *
 * @since JDK 11
 */
public class User {
	private String name;
	private int age;

	public User() {
	}

	public User(String name, int age) {
		this.name = name;
		this.age = age;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

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

DataController.java

package com.itheima.controller;

import com.itheima.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Description:
 * date: 2023/6/8 21:40
 *  参数名与jsp传入的变量名要一致
 * @since JDK 11
 */
@Controller
public class DataController {
	@RequestMapping(value = "/one")
	public String dataSubmit(String name, String pw){
		System.out.printf(name+" "+pw);
		return "login";
	}

	@RequestMapping(value = "/two")
	public String dataSubmit2(User user){
		System.out.printf(user.getName()+"，"+user.getAge());
		return "login";
	}
}

login.jsp

<%--
  Created by IntelliJ IDEA.
  User: xiaoshiguang
  Date: 2023/6/7
  Time: 22:25
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h2>hello</h2>
</body>
</html>

3、动态占位符提交

1/1值，1/1{}

index.jsp

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
  <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %></h1>
  <h3>3、动态占位符提交</h3>
  <%--1个/1个值，1/一个{}--%>
  <a href="${pageContext.request.contextPath}/three/张三/18.action">1/1值</a>
</body>
</html>

DataController.java

package com.itheima.controller;

import com.itheima.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

/**
 * Description:
 * date: 2023/6/8 21:40
 *  参数名与jsp传入的变量名要一致
 * @since JDK 11
 */
@Controller
public class DataController {
	@RequestMapping(value = "/one")
	public String dataSubmit(String name, String pw){
		System.out.printf(name+" "+pw);
		return "login";
	}

	@RequestMapping(value = "/two")
	public String dataSubmit2(User user){
		System.out.printf(user.getName()+"，"+user.getAge());
		return "login";
	}

    //3、动态占位符，1/1值，1/1{}
	@RequestMapping(value = "/three/{name}/{age}")
	public String dataSubmit3(@PathVariable String name, @PathVariable Integer age){
		System.out.printf(name +"，"+age);
		return "login";
	}
	@RequestMapping(value = "/three/{name2}/{age2}")
	public String dataSubmit4(@PathVariable("name2") String name, @PathVariable("age2") Integer age){
		System.out.printf(name +"，"+age);
		return "login";
	}
}
image-20230608223555020

4、参数名称不一致

index.jsp

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
  <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %></h1>
  <h3>4、参数名称不一致解决方案</h3>
  <%--1个/1个值，1/一个{}--%>
  <form action="${pageContext.request.contextPath}/four.action">
    name:<input type="text" name="name"><br/>
    age:<input type="text" name="age"><br/>
    <input type="submit" value="提交">
  </form>
</body>
</html>

controller.java

	@RequestMapping(value = "/four")
	public String dataSubmit4(@RequestParam("name") String name4,@RequestParam("age") Integer age4){
		System.out.printf(name4 +"，"+age4);
		return "login";
	}

login.jsp

<%--
  Created by IntelliJ IDEA.
  User: xiaoshiguang
  Date: 2023/6/7
  Time: 22:25
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h2>hello</h2>
</body>
</html>

5、原始方法，手动提取

index.jsp

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
  <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %></h1>
<br/>
<h3>5、原始方法</h3>
<form action="${pageContext.request.contextPath}/five.action">
  name:<input type="text" name="name"><br/>
  age:<input type="text" name="age"><br/>
  <input type="submit" value="提交">
</form>
</body>
</html>

DataController.java

package com.itheima.controller;

import com.itheima.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletRequest;

@Controller
public class DataController {
	@RequestMapping("/five")
	public String dataSubmit5(HttpServletRequest httpServletRequest){
		String name = httpServletRequest.getParameter("name");
		Integer age =  Integer.parseInt(httpServletRequest.getParameter("age"));
		System.out.printf("name"+"，"+age);
		return "login";
	}
}

login.jsp

<%--
  Created by IntelliJ IDEA.
  User: xiaoshiguang
  Date: 2023/6/7
  Time: 22:25
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h2>hello</h2>
</body>
</html>

六、中文编码设置

在发送post请求时，输入汉字，会发生乱码

配置过滤器

中文编码过滤器靠前放

web.xml

<?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">

    <!--中文乱码解决配置-->
    <filter>
        <filter-name>encode</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!-- 源码中3个成员变量 ，默认false不编码
        	private String encoding;
            private boolean forceRequestEncoding = false;
            private boolean forceResponseEncoding = false;
        -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encode</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--中文乱码解决配置-->

    <!--springmvc注册-->
    <servlet>
        <servlet-name>springmvc</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>
    </servlet>
    <servlet-mapping><!--根据请求的路由，查询是否有处理请求的方法（根据@RequestMapping）-->
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>
    <!--springmvc注册-->

</web-app>

七、处理器controller返回值

1、String

客户端资源的地址，自动拼接前缀和后缀，还可以屏蔽自动拼接字符串，可以指定返回的路径

2、Object

返回json格式的对象，自动将对象或集合转为json。需要用到jackson工具进行转换，必须要添加jackson依赖，一般用于Ajax请求。

3、void

无返回值，一般用于ajax请求。

4、基本数据类型，用于ajax请求

5、ModelAndView

返回数据和视图对象，现在很少用了。

八、ajax请求

1、流程

完成ajax请求，访问服务器，返回学生集合。

​ 1、添加jackson依赖

​ 2、在webapp目录下新建js目录，添加jQuery函数库

​ 3、在index.jsp页面上导入函数库

​ 4、在action上添加注解@ResponseBody，用来处理ajax请求

​ 5、在springmvc.xml文件中添加注解驱动<mvc:annotationdriven>，它用来解析@ResponseBody

2、配置

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.itheima</groupId>
  <artifactId>springmvc_003_ajax</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>springmvc_003_ajax</name>
  <packaging>war</packaging>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.target>1.8</maven.compiler.target>
    <maven.compiler.source>1.8</maven.compiler.source>
      <junit.version>5.9.1</junit.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-engine</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>

    <!--servlet依赖-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
    <!--springmvc依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>
    <!--jackson，json转换工具-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.8</version>
    </dependency>
  </dependencies>

    <!--别忘了build-->
<build>
  <resources>
    <resource>
      <directory>${basedir}/src/main/java</directory>
      <includes>
        <include>**/*.xml</include>
        <include>**/*.properties</include>
      </includes>
    </resource>
    <resource>
      <directory>${basedir}/src/main/resources</directory>
      <includes>
        <include>**/*.xml</include>
        <include>**/*.properties</include>
      </includes>
    </resource>
  </resources>
</build>
</project>

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">

    <!--包扫描-->
    <context:component-scan base-package="com.itheima.controller"></context:component-scan>
    <!--不需要视图解析器，因为处理的是ajax请求-->
<!--    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/ajax/"/>
        <property name="suffix" value=".jsp"/>
    </bean>-->
    <!--必须要添加注解驱动，使@RespondBody生效-->
    <mvc:annotation-driven></mvc:annotation-driven>
</beans>

web.xml

<?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">

    <!--添加中文编码解决方案-->
    <filter>
        <filter-name>encode</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!--
        	private String encoding;
            private boolean forceRequestEncoding = false;
            private boolean forceResponseEncoding = false;
        -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encode</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--添加中文编码解决方案-->

    <!--注册springmvc框架-->
    <servlet>
        <servlet-name>springmvc</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>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>
    <!--注册springmvc框架-->
</web-app>

九、ajax请求返回json数组功能实现

image-20230609001432600

目录结构，导入jQuery文件

前面有许多内容没有记笔记，是在company的电脑上完成的。

P45登陆业务实现

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.powerpoint</groupId>
    <artifactId>springmvc_005_webinf</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>springmvc_005_webinf</name>
    <packaging>war</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
        <junit.version>5.9.1</junit.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <!--配置springmvc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.5.RELEASE</version>
        </dependency>
    </dependencies>


    <!--配置资源文件-->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
        </resources>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.3.2</version>
            </plugin>
        </plugins>
    </build>
</project>

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"
       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">

<!--添加包扫描-->
<context:component-scan base-package="com.powerpoint.controller"></context:component-scan>
<!--添加视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--配置前缀-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--配置后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

web.xml

<?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">

    <!--中文编码过滤器-->
    <filter>
        <filter-name>encode</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!--	private String encoding;
                private boolean forceRequestEncoding = false;
                private boolean forceResponseEncoding = false;-->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encode</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--注册springmvc.xml-->
    <servlet>
        <servlet-name>springmvc</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>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

webapp/WEB-INF/jsp/login.jsp

<%--
  Created by IntelliJ IDEA.
  User: xiaoshiguang
  Date: 2023/7/4
  Time: 21:41
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登录</title>
</head>
<body>
    <form action="${pageContext.request.contextPath}/loginShow" method="post">
        姓名：<input type="text" name="name">
        <br>
        密码：<input type="password" name="pwd">
        <br>
        <input type="submit">
        ${msg}
    </form>
</body>
</html>

webapp/WEB-INF/jsp/main.jsp

<%--
  Created by IntelliJ IDEA.
  User: xiaoshiguang
  Date: 2023/7/4
  Time: 21:57
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>main</title>
</head>
<body>
用户名：${name}<br>
密码：${pwd}
</body>
</html>

controller/WebInfAction.java

package com.powerpoint.controller;

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

import javax.servlet.http.HttpServletRequest;

/**
 * Description:
 * date: 2023/7/4 21:52
 *
 * @since JDK 11
 */
@Controller
public class WebInfAction {
	@RequestMapping("/login")
	public String login(){
		System.out.println("请求转发到login页面");
		return "login";
	}
	@RequestMapping("loginShow")
	public String loginShow(String name,String pwd,HttpServletRequest request){
		if("yyds".equalsIgnoreCase(name) && "yyds".equalsIgnoreCase(pwd)){
			request.setAttribute("name",name);
			request.setAttribute("pwd",pwd);
			return "main";
		}
		String msg = "用户名或密码错误";
		request.setAttribute("msg",msg);
		return "login";
	}
}

登陆业务的实现，隐藏了.jsp，安全性提高，只能访问webapp下的index.jsp，通过在springmvc.xml的视图解析器的修改以及在controller层的路径修改，实现在页面输出localhost:8080/login，就可以跳转到login.jsp页面

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