SpringMVC之Controller简单使用

//环境 spring-4.3.18/JDK1.8/开发工具/IntelliJ IDEA 2018.2.5 x64

//工程结构图

//web.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
 5          version="4.0">
 6     <!--配置Spring IoC配置文件路径-->
 7     <context-param>
 8         <param-name>contextConfigLocation</param-name>
 9         <param-value>/WEB-INF/applicationContext.xml,/WEB-INF/dispatcher-servlet.xml</param-value>
10     </context-param>
11     <!--初始化Spring IoC容器-->
12     <listener>
13         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
14     </listener>
15     <!--Spring MVC会根据servlet-name配置，找到/WEB-INF/dispatcher-servlet.xml作为配置文件载入web工程-->
16     <servlet>
17         <servlet-name>dispatcher</servlet-name>
18         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
19         <!--配置Spring IoC配置文件路径-->
20         <!--<init-param>
21             <param-name>contextConfigLocation</param-name>
22             <param-value>/WEB-INF/applicationContext.xml,/WEB-INF/dispatcher-servlet.xml</param-value>
23         </init-param>-->
24         <load-on-startup>1</load-on-startup>
25     </servlet>
26     <!--Controller-Servlet拦截配置-->
27     <servlet-mapping>
28         <servlet-name>dispatcher</servlet-name>
29         <url-pattern>/</url-pattern>
30     </servlet-mapping>
31 </web-app>

//applicationContext.xml 该文件可省略，同时将

<!--配置Spring IoC配置文件路径-->
 7     <context-param>
 8         <param-name>contextConfigLocation</param-name>
 9         <param-value>/WEB-INF/applicationContext.xml,/WEB-INF/dispatcher-servlet.xml</param-value>
10     </context-param>

改成

<!--配置Spring IoC配置文件路径-->
 7     <context-param>
 8         <param-name>contextConfigLocation</param-name>
 9         <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
10     </context-param>

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:mvc="http://www.springframework.org/schema/mvc"
 5        xmlns:context="http://www.springframework.org/schema/context"
 6        xmlns:aop="http://www.springframework.org/schema/aop"
 7        xmlns:tx="http://www.springframework.org/schema/tx"
 8        xsi:schemaLocation="http://www.springframework.org/schema/beans
 9         http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
10         http://www.springframework.org/schema/mvc
11         http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
12         http://www.springframework.org/schema/context
13         http://www.springframework.org/schema/context/spring-context.xsd
14         http://www.springframework.org/schema/aop
15         http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
16         http://www.springframework.org/schema/tx
17         http://www.springframework.org/schema/tx/spring-tx.xsd">
18 
19 
20 
21 
22 </beans>

//dispatcher-servlet.xml 下面部分声明可省略

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:mvc="http://www.springframework.org/schema/mvc"
 5        xmlns:context="http://www.springframework.org/schema/context"
 6        xmlns:aop="http://www.springframework.org/schema/aop"
 7        xmlns:tx="http://www.springframework.org/schema/tx"
 8        xsi:schemaLocation="http://www.springframework.org/schema/beans
 9         http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
10         http://www.springframework.org/schema/mvc
11         http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
12         http://www.springframework.org/schema/context
13         http://www.springframework.org/schema/context/spring-context.xsd
14         http://www.springframework.org/schema/aop
15         http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
16         http://www.springframework.org/schema/tx
17         http://www.springframework.org/schema/tx/spring-tx.xsd">
18 
19     <!--使用注解驱动-->
20     <mvc:annotation-driven></mvc:annotation-driven>
21     <!--<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
22     <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>-->
23     <!--扫描装载的包-->
24     <context:component-scan base-package="com.jhc.controller"></context:component-scan>
25     <!--定义视图解析器-->
26     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>
27 
28 </beans>

//index.jsp

 1 <%--
 2   Created by IntelliJ IDEA.
 3   User: JHC
 4   Date: 2018/11/30
 5   Time: 17:31
 6   To change this template use File | Settings | File Templates.
 7 --%>
 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 9 <html>
10   <head>
11     <title>Hello Word</title>
12   </head>
13   <body>
14   Say:${hello}<br>
15   </body>
16 </html>

//HelloController.java

 1 package com.jhc.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.servlet.ModelAndView;
 6 
 7 @Controller
 8 public class HelloController {
 9 
10     @RequestMapping(value = "/hello")
11     public ModelAndView sayHello(){
12         System.out.println("Hello Word");
13         ModelAndView modelAndView=new ModelAndView();
14         modelAndView.addObject("hello","Hello Word");
15         modelAndView.setViewName("/index.jsp");
16         return modelAndView;
17     }
18 }

SpringMVC之Controller简单使用

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