MyFilter
            
              
       
        Myfilter
               
       
        com.MyFilter
           
          
              
       
        Myfilter
               
       
        /*
           
          
                
       
        Test
                 
       
        com.Test
           
          
                
       
        Test
                 
       
        /test
           
      
     

 

1 //这是我的自定义监听 2 import java.io.IOException; 3  4 import javax.servlet.Filter; 5 import javax.servlet.FilterChain; 6 import javax.servlet.FilterConfig; 7 import javax.servlet.ServletException; 8 import javax.servlet.ServletRequest; 9 import javax.servlet.ServletResponse;10 import javax.servlet.http.HttpServletRequest;11 12 public class MyFilter implements Filter{13 14     @Override15     public void destroy() {16         17     }18 19     @Override20     public void doFilter(ServletRequest arg0, ServletResponse arg1,FilterChain arg2) throws IOException, ServletException {21         22         HttpServletRequest request =( HttpServletRequest)arg0;23         24         25         System.out.println("----->"+request.getRequestURI());26         27         if("/MyFilter/test".equals(request.getRequestURI())){28             arg2.doFilter(arg0, arg1);29         }30     }31 32     @Override33     public void init(FilterConfig arg0) throws ServletException {34         35     }36 }37 38 39 import javax.servlet.ServletRequest;40 import javax.servlet.ServletResponse;41 import javax.servlet.http.HttpServlet;42 43 public class Test extends HttpServlet{44 45     private static final long serialVersionUID = 1L;46 47     @Override48     public void service(ServletRequest arg0, ServletResponse arg1){49         System.out.println("我是MyFilter类的测试标识");50         51     }52 }

主要是针对WEB开发的3大包装类的监听