新建SpringMVC工程
目录结构
操作流程
pom.xml
<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.springapp</groupId>
<artifactId>DemoSpringMVC</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>DemoSpringMVC</name>
<properties>
<spring.version>3.2.0.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>DemoSpringMVC</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<includes>
<include>**/*Tests.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>
</project>
web.xml
<web-app 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>
<!--注册SpringMVC的核心控制器-->
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!--
回去寻找/WEB-INF/<servlet-name>-servlet.xml文件
-->
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<!--<url-pattern>/</url-pattern>-->
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>
mvc-dispatcher-servlet.xml
<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">
<!--
注册Action
class表示处理类的全路径
name表示请求路径
-->
<bean name="/hello.action" class="com.springapp.mvc.HelloController"></bean>
</beans>
hello.jsp
<%@ page language="java" pageEncoding="UTF-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
hello.jsp<br/>
成功<br/>
request:${requestScope.massage}<br/>
request:${requestScope.hello}
</body>
</html>
HelloController.java
package com.springapp.mvc;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 控制器Action
* 处理器Action
* Created by liguodong on 2015/11/16.
*/
public class HelloController implements Controller {
static int num = 0;
public HelloController(){
System.out.println("这是一个单例,只会创建一次。HelloController的hashCode是:"+this.hashCode());
}
/**
* 业务方法
* @param httpServletRequest
* @param httpServletResponse
* @return
* @throws Exception
*/
@Override
public ModelAndView handleRequest(HttpServletRequest httpServletRequest,
HttpServletResponse httpServletResponse)
throws Exception {
/**
* ModelAndView表示向视图封装数据和路径
*/
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("hello","hello");
modelAndView.addObject("massage","心好累,弄了半天。。。");
System.out.println("第"+ (++num) +"请求。。。");
//modelAndView.setViewName("redirect:/WEB-INF/pages/hello.jsp");
//modelAndView.setViewName("forward:/hello");
//modelAndView.setViewName("hello");
modelAndView.setViewName("/WEB-INF/pages/hello.jsp");
return modelAndView;
}
}
执行结果
后端服务器
前端页面
配置映射器,适配器,视图解析器
mvc-dispatcher-servlet.xml
<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">
<!--
注册Action
class表示处理类的全路径
name表示请求路径
必选
-->
<bean name="/hello.action" class="com.springapp.mvc.HelloController"></bean>
<!--
映射器
BeanNameUrlHandlerMapping表示将bean标签的name属性当做URL请求
可选
-->
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
<!--
适配器
SimpleControllerHandlerAdapter表示用于寻找实现了Controller接口的Action类
可选
-->
<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
<!--
视图解析器
InternalResourceViewResolver表示通过ModelAndView对象中封装的视图名找到真正的页面
可选
-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"></bean>
</beans>