用intellj 建一个spring mvc 项目DEMO

spring的起初可能经常碰壁，因为网上的资料都是混乱的xml堆成的，混乱难以理解，我这个也是，阿哈哈哈哈！

新建一个Maven->create from archetype->org.jetbrains.idea.maven.model.MavenArchetype ->next->finsh

在src/main建立目录Java/com.xx.controller目录，然后建立HomeController,代码如下：

package com.speiyou.controller;

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

@Controller
public class HomeController {
    @ResponseBody
    @RequestMapping("/hello")
    public String index(){
        return "hello bobby";
    }
}

webapp/WEB-INF/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>
  <servlet>
    <servlet-name>myServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>myServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>

myServlet-servlet.xml (myServlet和上面的servlet-name相对应)

<?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.speiyou.controller"/>
    <!--<context:compent-scan base-package="com.speiyou.controller"/>-->

</beans>

pom.xml project节点下增加节点：

<dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.13.RELEASE</version>
    </dependency>
  </dependencies>

project/build/plugins节点增加：

    <plugin>
        <groupId>org.apache.tomcat.maven</groupId>
        <artifactId>tomcat7-maven-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <port>9003</port>
          <path>/</path>

        </configuration>
      </plugin>

mvn:tomcat7:run 在Maven project 窗口,Plugins->tomcat7->tomcat7:run

即可运行!