struts1的拦截器，一个简单的示范

1·首先写一个类 MyInterceptor 继承ActionServlet,代码如下

 public class MyInterceptor extends ActionServlet {

     @Override
     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws IOException, ServletException {
         // TODO Auto-generated method stub
         System.out.println("dopost");//这里可以写成自己的拦截代码。。大家就随意发挥吧
         super.doPost(request, response);
     }
     @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws IOException, ServletException {
         // TODO Auto-generated method stub
         System.out.println("doget");//这里可以写成自己的拦截代码。。大家就随意发挥吧
         super.doGet(request, response);
     }
 }

2·然后把WEB.xml改下下面这样

 <servlet>
   <servlet-name>action</servlet-name>
   <servlet-class>org.apache.struts.action.MyInterceptor.MyInterceptor</servlet-class>
   <init-param>
     <param-name>config</param-name>
     <param-value>/WEB-INF/struts-config.xml</param-value>
   </init-param>
   <init-param>
     <param-name>debug</param-name>
     <param-value>3</param-value>
   </init-param>
   <init-param>
     <param-name>detail</param-name>
     <param-value>3</param-value>
   </init-param>
   <load-on-startup>0</load-on-startup>
 </servlet>
 <servlet-mapping>
   <servlet-name>action</servlet-name>
   <url-pattern>*.do</url-pattern>
 </servlet-mapping>