快捷部署spring mvc

在IntelliJ中创建一个Maven项目，确定你的电脑中已经安装maven。Maven创建后项目的结构如下：

1.png

修改pom.xml文件如下, 使用maven导入需要的包和插件：

<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>com.remkohde.hello</groupId>
    <artifactId>hello</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>Hello Webapp</name>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.15.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.15.RELEASE</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>hello</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration></configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <server>mytomcat7</server>
                    <!--<port>8089</port>-->
                    <path>/</path>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

在src／main文件夹下创建webapp文件夹，在webapp下创建web.xml,spring_mvc_example.xml和WEB-INF文件夹，在WEB-INF下创建jsp文件夹。结构如下：

2.png

修改web.xml如下。如果出现“servlet should have a mapping问题”，请按以下方法解决问题或自行百度（“https://www.cnblogs.com/thinkingandworkinghard/p/6717852.html”）。

<web-app id = "WebApp_ID" version = "2.4"
         xmlns = "http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation = "http://java.sun.com/xml/ns/j2ee
   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>Spring MVC Application</display-name>

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

    <servlet-mapping>
        <servlet-name>spring_mvc_example</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring_mvc_example.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

修改spring_mvc_example.xml如下：

<beans xmlns = "http://www.springframework.org/schema/beans"
       xmlns:context = "http://www.springframework.org/schema/context"
       xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
       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.shudeng.controller" />

    <bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name = "prefix" value = "/WEB-INF/jsp/" />
        <property name = "suffix" value = ".jsp" />
    </bean>

</beans>

在main.java文件夹下创建com.shudeng.controller包，用来创建controller文件。在controller中创建HelloWorld.java,内容如下：

package com.shudeng.controller;

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

/**
 * Created by Wushudeng on 2018/4/13.
 */
@Controller
@RequestMapping(value = "/hello")
public class HelloWorldController {
    @RequestMapping(value = "/main", method = RequestMethod.GET)
    public String sayHello(ModelMap model) {
        model.addAttribute("greeting", "Hello World from Spring 4 MVC");
        return "welcome";
    }

    @RequestMapping(value = "/hello", method = RequestMethod.GET)
    public String sayHelloAgain(ModelMap model) {
        model.addAttribute("greeting", "Hello World Again, from Spring 4 MVC");
        return "welcome";
    }
}

在jsp下创建welcome.jsp文件，内容如下：

<%--
  Created by IntelliJ IDEA.
  User: Wushudeng
  Date: 2018/4/14
  Time: 上午9:51
  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>
<h1>welcome</h1>
<p>welcome to spring mvc</p>
</body>
</html>

在当前目录执行mvn tomcat7:run, 然后在页面打开http://localhost:8080/hello/hello即可。在pom中可以改变tomcat的端口。