springmvc—handlermapping三种映射方式

<!-- 配置controller -->
<bean id="testController"  name="/hello.do" class="com.roy.controller.TestController"/>
<!-- 按照controller的name来映射寻找controlller,默认存在的 -->
<beanclass="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>

  <!-- 配置controller -->
  <bean id="testController"  class="com.roy.controller.TestController"/>  
  <!-- 按照url来映射 -->
  <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
   <property name="mappings">
    <props>
     <prop key="/hello.do">testController</prop>
    </props>
   </property>
  </bean>

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"></bean>

package com.roy.controller; 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; 
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController; 
public class TestController extends AbstractController { 
 @Override
 protected ModelAndView handleRequestInternal(HttpServletRequest arg0,
   HttpServletResponse arg1) throws Exception {
  System.out.println("hello controller");
  return new ModelAndView("index");
 } 
}