1. Add maven dependency (pom.xml)

<dependencies>

    <!-- Servlet API rely on -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <scope>provided</scope>
    </dependency>

    <!-- jstl -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
    </dependency>

    <!-- Spring Web MVC rely on -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
    </dependency>

</dependencies>

2. Set packing method

<packaging>war</packaging>

3. Add a tomcat packaging plug-in (pom.xml)

• Add this component, package can be built-in tomcat, without putting war package under tomcat, start directly.

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.1</version>
            <executions>
                <execution>
                    <id>tomcat-run</id>
                    <goals>
                        <goal>exec-war-only</goal>
                    </goals>
                    <phase>package</phase>
                    <configuration>
                        <path>/</path>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

4. Implement Controller

package com.imooc.webmvc.controller;

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

@Controller
public class HelloWorldController {

    @RequestMapping("")
    public String index(Model model) {
        return "index";
    }

}

5. Create webapp directory

• Create the directory webapp under src/main
• Create WEB-INF directory in webapp directory

6. Configure spring

• Create the file app-context.xml under / src/main/webapp/WEB-INF

<?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
            http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="com.imooc.webmvc" />

    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" />

    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" />

    <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/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

7. Deploy dispatcher Servlet

• Create the file web.xml under src/main/webapp/WEB-INF

<web-app>
    <servlet>
        <servlet-name>app</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/app-context.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>app</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

8. Create view file

• Create jsp folder under src/main/webapp/WEB-INF
• Create index.jsp in the JSP folder
• The content of this file can be empty temporarily

9. Build operation

• Enter the module directory through the command line
• Construction project

  mvn -DMaven.test.skip -U clean package
  

  • It will be found that target will generate a project's jar package
• Operation item

  java -jar target/webmvc-0.0.1-SNAPSHOT-war-exec.jar
  

• test
  • Browser visit http://localhost:8080
  • Although there is no content returned (because index.jsp has no content), you can see that the network request return status is 200, indicating the response is successful.