idea+maven+springmvc+helloworld

1、添加依赖，并在项目上添加Spring mvc框架的支持（add FrameWork Support）：

 <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.12</version>
       <scope>test</scope>
     </dependency>
     <!--日志-->
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-log4j12</artifactId>
       <version>1.7.21</version>
     </dependency>
     <!--J2EE-->
     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>javax.servlet-api</artifactId>
       <version>3.1.0</version>
     </dependency>
     <dependency>
       <groupId>javax.servlet.jsp</groupId>
       <artifactId>jsp-api</artifactId>
       <version>2.2</version>
     </dependency>
     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>jstl</artifactId>
       <version>1.2</version>
     </dependency>
     <!--mysql驱动包-->
     <dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>5.1.35</version>
     </dependency>
     <!--springframework-->
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-web</artifactId>
       <version>4.2.6.RELEASE</version>
     </dependency>
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-webmvc</artifactId>
       <version>4.2.6.RELEASE</version>
     </dependency>
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-context</artifactId>
       <version>4.2.6.RELEASE</version>
     </dependency>
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-test</artifactId>
       <version>4.2.6.RELEASE</version>
     </dependency>
       <dependency>
           <groupId>org.springframework</groupId>
           <artifactId>spring-jdbc</artifactId>
           <version>4.2.6.RELEASE</version>
       </dependency>
     <dependency>
       <groupId>com.github.stefanbirkner</groupId>
       <artifactId>system-rules</artifactId>
       <version>1.16.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>org.aspectj</groupId>
       <artifactId>aspectjweaver</artifactId>
       <version>1.8.9</version>
     </dependency>
     <!--其他需要的包-->
     <dependency>
         <groupId>org.apache.commons</groupId>
         <artifactId>commons-lang3</artifactId>
         <version>3.4</version>
     </dependency>
     <dependency>
         <groupId>commons-fileupload</groupId>
         <artifactId>commons-fileupload</artifactId>
         <version>1.3.1</version>
     </dependency>

2、配置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_3_1.xsd"
          version="3.1">

     <display-name>Archetype Created Web Application</display-name>

     <!--welcome pages-->
     <welcome-file-list>
         <welcome-file>index.jsp</welcome-file>
     </welcome-file-list>

     <!--配置springmvc DispatcherServlet-->
     <servlet>
         <servlet-name>springMVC</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <init-param>
             <!--配置dispatcher.xml作为mvc的配置文件-->
             <param-name>contextConfigLocation</param-name>
             <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
         </init-param>
         <load-on-startup>1</load-on-startup>
         <async-supported>true</async-supported>
     </servlet>
     <servlet-mapping>
         <servlet-name>springMVC</servlet-name>
         <url-pattern>/</url-pattern>
     </servlet-mapping>
     <!--把applicationContext.xml加入到配置文件中-->
     <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>/WEB-INF/applicationContext.xml</param-value>
     </context-param>
     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>
 </web-app>

3、配置dispatcher-servlet.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 http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
     <!--此文件负责整个mvc中的配置-->

     <!--启用spring的一些annotation -->
     <context:annotation-config/>

     <!-- 配置注解驱动 可以将request参数与绑定到controller参数上 -->
     <mvc:annotation-driven/>

     <!--静态资源映射-->
     <!--本项目把静态资源放在了webapp的statics目录下，资源映射如下-->
     <mvc:resources mapping="/css/**" location="/WEB-INF/statics/css/"/>
     <mvc:resources mapping="/js/**" location="/WEB-INF/statics/js/"/>
     <mvc:resources mapping="/image/**" location="/WEB-INF/statics/image/"/>

     <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀(如果最后一个还是表示文件夹,则最后的斜杠不要漏了) 使用JSP-->
     <!-- 默认的视图解析器 在上边的解析错误时使用 (默认使用html)- -->
     <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
         <property name="prefix" value="/WEB-INF/views/"/><!--设置JSP文件的目录位置-->
         <property name="suffix" value=".jsp"/>
         <property name="exposeContextBeansAsAttributes" value="true"/>
     </bean>

     <!-- 自动扫描装配 -->
     <context:component-scan base-package="example.controller"/>
 </beans>

4、配置applicationContext.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 http://www.springframework.org/schema/context/spring-context.xsd">
     <context:component-scan base-package="example"/>
 </beans>

5、编写controller

 @Controller
 @RequestMapping("/home")
 public class IndexController {

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

6、在WEB-INF下建立views文件夹，并在这个文件夹下建立文件test.jsp

7、运行调试；

另外集成mybatis可以参考文章：https://www.cnblogs.com/xiaoL/p/7753130.html