一、web.xml

（1）指定过滤的Servlet类

（2）配置过滤规则，过滤以.mail结尾的链接

     
             
              
       
        mailServlet
               
       
                    com.zit.rfid.app.prms.business.service.servlet.MailServlet        
               
       
        2
           
          
              
       
        mailServlet
               
       
        *.mail
           
       
     

 

 

 

二、Servlet过滤类

　　

　　当链接中包含以.mail结尾的链接，就执行下面这个Servlet

package com.zit.rfid.app.prms.business.service.servlet;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class MailServlet extends HttpServlet {    private static final long serialVersionUID = 1L;        @Override    protected void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        doPost(request, response);    }        @Override    protected void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        StringBuffer mailUrl = new StringBuffer(); String reqUrl = request.getRequestURL().substring(0, request.getRequestURL().lastIndexOf(".mail")); mailUrl.append(reqUrl) .append(".html?id=") .append(request.getParameter("id")); Cookie cookie = new Cookie("mailUrl", mailUrl.toString()); //生命周期：秒 cookie.setMaxAge(3600); response.addCookie(cookie); response.sendRedirect(mailUrl.toString()); } }

 

（1） 获取该链接，重新组装链接地址（比如：把.mail换成.html，因为.mail是过滤规则）

（2）将该链接加入到Cookie

（3）在前台JS里，比如登陆成功后的函数里：获取该Cookie，重新跳转到该链接即可