Spring MVC demo
1、新建一web项目 springmvc，并在lib目录中加入jar包commons-logging.jar、log4j-1.2.13.jar、slf4j-api-1.5.6.jar\spring.jar\spring-webmvc.jar
2、把web项目中的web.xml改成如下：
3、新建一测试用的action类，HelloWorldAction.java类
4、在WEB-INF目录中加入一个配置文件dispatcherServlet-servlet.xml，里面的内容为
再在WebRoot目录下新建一个用于显示的jsp页面，sayHello.jsp
2、把web项目中的web.xml改成如下：
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!--配置Sring MVC的核心控制器DispatcherServlet --> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> </servlet> <!--为DispatcherServlet建立映射 --> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> </web-app>
3、新建一测试用的action类，HelloWorldAction.java类
package cn.ehoo.springmvc.test;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class HelloWorldAction implements Controller { // 控制器需要实现 Controller接口
private String helloWorld; // 该属性用于获取配置文件中的helloWorld属性
private String viewPage; // 用于获取配置文件中的viewPage属性
public ModelAndView handleRequest(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException { // 在该方法中处理用户请求
Map<String, String> model = new HashMap<String, String>();
model.put("helloWorld", getHelloWorld()); // 将helloWorld属性存入model中
return new ModelAndView(getViewPage(), model); // 调用getViewPage获取要返回的页面
}
public String getHelloWorld() {
return helloWorld;
}
public void setHelloWorld(String helloWorld) {
this.helloWorld = helloWorld;
}
public String getViewPage() {
return viewPage;
}
public void setViewPage(String viewPage) {
this.viewPage = viewPage;
}
}
4、在WEB-INF目录中加入一个配置文件dispatcherServlet-servlet.xml，里面的内容为
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework. org/dtd/spring-beans.dtd"> <beans> <bean id="localeResolver" class="org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver"></bean> <!--配置控制器的映射--> <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <props> <prop key="helloWorld.do">helloWorldAction</prop> </props> </property> </bean> <!--配置视图--> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass"> <value>org.springframework.web.servlet.view.InternalResourceView</value> </property> </bean> <!--指定控制器的实现类，并且配置其参数的值--> <bean id="helloWorldAction" class="cn.ehoo.springmvc.test.HelloWorldAction"> <property name="helloWorld"> <value>Hello Spring World!</value> </property> <property name="viewPage"> <value>sayHello.jsp</value> </property> </bean> </beans>
再在WebRoot目录下新建一个用于显示的jsp页面，sayHello.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head><title>第一个Spring MVC实例</title></head>
<%
String str = (String)request.getAttribute("helloWorld");
%>
<body>
<h1>您输入的欢迎语是<%=str%></h1>
</body>
</html>