问题：

 

 

解决：

1.  创建maven web项目 pom.xml 如下，主要是添加spring-webmvc 依赖
   
   <?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.enjoylearn.demo.spring</groupId> <artifactId>mvc2</artifactId> <version>1.0</version> <packaging>war</packaging> <name>mvc2</name> <properties> <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.10.RELEASE</version> </dependency> <dependency> <groupId>javax</groupId> <artifactId>javaee-web-api</artifactId> <version>7.0</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.7</source> <target>1.7</target> <compilerArguments> <endorseddirs>${endorsed.dir}</endorseddirs> </compilerArguments> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.3</version> <configuration> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-dependency-plugin</artifactId> <version>2.6</version> <executions> <execution> <phase>validate</phase> <goals> <goal>copy</goal> </goals> <configuration> <outputDirectory>${endorsed.dir}</outputDirectory> <silent>true</silent> <artifactItems> <artifactItem> <groupId>javax</groupId> <artifactId>javaee-endorsed-api</artifactId> <version>7.0</version> <type>jar</type> </artifactItem> </artifactItems> </configuration> </execution> </executions> </plugin> </plugins> </build> </project>

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   <?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <modelVersion>4.0.0</modelVersion>       <groupId>com.enjoylearn.demo.spring</groupId>     <artifactId>mvc2</artifactId>     <version>1.0</version>     <packaging>war</packaging>       <name>mvc2</name>       <properties>         <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>     </properties>          <dependencies>         <dependency>             <groupId>org.springframework</groupId>             <artifactId>spring-webmvc</artifactId>             <version>4.3.10.RELEASE</version>         </dependency>         <dependency>             <groupId>javax</groupId>             <artifactId>javaee-web-api</artifactId>             <version>7.0</version>             <scope>provided</scope>         </dependency>     </dependencies>       <build>         <plugins>             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-compiler-plugin</artifactId>                 <version>3.1</version>                 <configuration>                     <source>1.7</source>                     <target>1.7</target>                     <compilerArguments>                         <endorseddirs>${endorsed.dir}</endorseddirs>                     </compilerArguments>                 </configuration>             </plugin>             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-war-plugin</artifactId>                 <version>2.3</version>                 <configuration>                     <failOnMissingWebXml>false</failOnMissingWebXml>                 </configuration>             </plugin>             <plugin>                 <groupId>org.apache.maven.plugins</groupId>                 <artifactId>maven-dependency-plugin</artifactId>                 <version>2.6</version>                 <executions>                     <execution>                         <phase>validate</phase>                         <goals>                             <goal>copy</goal>                         </goals>                         <configuration>                             <outputDirectory>${endorsed.dir}</outputDirectory>                             <silent>true</silent>                             <artifactItems>                                 <artifactItem>                                     <groupId>javax</groupId>                                     <artifactId>javaee-endorsed-api</artifactId>                                     <version>7.0</version>                                     <type>jar</type>                                 </artifactItem>                             </artifactItems>                         </configuration>                     </execution>                 </executions>             </plugin>         </plugins>     </build>   </project>

   
    
2. 设置/WEB-INF/web.xml 映射 / 到DispatcherServlet
   
   <?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_3_1.xsd" version="3.1"> <session-config> <session-timeout> 30 </session-timeout> </session-config> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>

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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_3_1.xsd" version="3.1">     <session-config>         <session-timeout>             30         </session-timeout>     </session-config>     <servlet>         <servlet-name>springmvc</servlet-name>         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>     </servlet>     <servlet-mapping>         <servlet-name>springmvc</servlet-name>         <url-pattern>/</url-pattern>     </servlet-mapping> </web-app>

   
    
3. 设置/WEB-INF/springmvc-servlet.xml  启用Controller 及 jsp
   
   <?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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c" xmlns:context="http://www.springframework.org/schema/context" xmlns:lang="http://www.springframework.org/schema/lang" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-4.3.xsd "> <context:component-scan base-package="com.enjoylearn.demo.spring.mvc2" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>--> <property name="prefix" value="/WEB-INF/"/> <property name="suffix" value=".jsp"/> </bean> </beans>

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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:aop="http://www.springframework.org/schema/aop"        xmlns:c="http://www.springframework.org/schema/c"        xmlns:context="http://www.springframework.org/schema/context"        xmlns:lang="http://www.springframework.org/schema/lang"          xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd           http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-4.3.xsd ">     <context:component-scan base-package="com.enjoylearn.demo.spring.mvc2" />     <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">         <!--        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>-->         <property name="prefix" value="/WEB-INF/"/>         <property name="suffix" value=".jsp"/>     </bean> </beans>

   
    
4. 创建UserController class
   
   /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.enjoylearn.demo.spring.mvc2; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; /** * * @author sihai */ @Controller @RequestMapping("user") public class UserController { @GetMapping public String list(ModelMap model){ model.addAttribute("aa","你好"); return "user/list"; } }

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   /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.enjoylearn.demo.spring.mvc2;   import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping;   /** * * @author sihai */ @Controller @RequestMapping("user") public class UserController {          @GetMapping     public String list(ModelMap model){         model.addAttribute("aa","你好");         return "user/list";     } }

   
    
5. 创建/WEB-INF/user/list.jsp
   
   <%-- Document : list Created on : 2017-8-31, 18:22:27 Author : sihai --%> <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <h1>Hello World!</h1> ${aa} </body> </html>

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   <%--     Document   : list     Created on : 2017-8-31, 18:22:27     Author     : sihai --%>   <%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html>     <head>         <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">         <title>JSP Page</title>     </head>     <body>         <h1>Hello World!</h1>         ${aa}     </body> </html>

   
    

 

 

参考：