在spring mvc 框架中我们可以使用三种url mapping的控制器
（1）BeanNameUrlHandlerMapping 默认控制器，方式是将表现层的url和bean name绑定在一起
（2）SimpleUrlHandlerMapping 通过properties形式配置url mapping和controller的映射
（3）CommonsHandlerMappingy 使用元数据的方式
我们的action
package Action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.Controller;import org.springframework.web.servlet.DispatcherServlet;
public class HomeController implements Controller ...{
private String greeting; 
public String getGreeting() ...{ return greeting;
} public void setGreeting(String greeting) ...{ this.greeting = greeting; } public ModelAndView handleRequest(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception ...{ return new ModelAndView("home","message",greeting); } 
}
JSP页面 命名为home.jsp因为ModelAndView对象中的视图逻辑名为home
<%...@ page language="java" import="java.util.*" pageEncoding="GB18030"%><%...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> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> ${message}<br> </body></html>
web.xml
<?xml version="1.0" encoding="UTF-8"?><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"> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/train-service.xml,/WEB-INF/train-data.xml,/WEB-INF/train-servlet.xml</param-value> </context-param> <servlet> <servlet-name>train</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>train</servlet-name> <url-pattern>*.mvc</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list></web-app>
train-servlet.xml 前缀为train，因为web.xml中servlet-name为train
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" ><beans><!-- 使用BeanNameUrlHandlerMapping控制器<bean id="beanNameUrlMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/><bean name="/home.mvc" class="Action.HomeController"> <property name="greeting"> <value>wlcome to spring mvc</value> </property></bean> --><!-- 使用SimpleUrlHandlerMapping控制器 --><bean id="HomeController" class="Action.HomeController"> <property name="greeting"> <value>wlcome to spring mvc</value> </property></bean><bean id="simpleUrlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <props> <prop key="/home.mvc">HomeController</prop> </props> </property></bean><!-- 使用commonsHandlerMappingy元数据控制器，需要jakarta common attributes包 --><bean id="urlMapping" class="org.springframework.web.servlet.handler.metadata.CommonsPathMapHandlerMapping"/><bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix"> <value>/jsp/</value> </property> <property name="suffix"> <value>.jsp</value> </property></bean></beans>
需要注意的是，如果我们是用元数据方式，需要更改我们的action为
package Action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.validation.BindException;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.AbstractCommandController;/** *//** * @@org.springframework.web.servlet.handler.commonsattributes.PathMap("/home.mvc"); */public class HomeController extends AbstractCommandController ...{ private String greeting; public String getGreeting() ...{ return greeting; } public void setGreeting(String greeting) ...{ this.greeting = greeting; } protected ModelAndView handle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, BindException arg3) throws Exception ...{ // TODO 自动生成方法存根 return null; } protected ModelAndView handleRequestInternal(HttpServletRequest arg0, HttpServletResponse arg1) throws Exception ...{ return new ModelAndView("home","message",greeting); } }