Jump to login page when session expires_html/css_WEB-ITnose

The project needs to have an automatic logout function. I checked the information on the Internet and initially planned to use session monitoring. Configure the listener as follows

1. In the project's web.xml Add the following code to the file:

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监听器路径

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public class SessionListener implements HttpSessionListener {  public void sessionCreated(HttpSessionEvent arg0) {   // session创建时执行  SimpleDateFormat simpleFormat = new SimpleDateFormat("mm-ss-ms");   String nowtimes = simpleFormat.format(new Date());   User u=null;   //System.out.println("执行。。 当前时间：" nowtimes "_" u);  HttpSession ses= arg0.getSession();   String id=ses.getId() "_" ses.getCreationTime();  }  public void sessionDestroyed(HttpSessionEvent arg0) {   // session失效时执行  SimpleDateFormat simpleFormat = new SimpleDateFormat("mm-ss-ms");   String nowtimes = simpleFormat.format(new Date());    //System.out.println("session失效了。。 结束时间： " nowtimes); } }

Listener path

2. Write a java class.

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sessionFilter         com.orchestrall.web.helper.session.SessionFilter         sessionFilter         /actions/*

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public class SessionListener implements HttpSessionListener { public void sessionCreated(HttpSessionEvent arg0) { // Executed when session is created SimpleDateFormat simpleFormat = new SimpleDateFormat("mm-ss-ms"); String nowtimes = simpleFormat.format(new Date()); User u=null; //System.out.println("Execute. . Current time: " nowtimes "_" u); HttpSession ses= arg0.getSession(); String id=ses.getId() "_" ses.getCreationTime(); } public void sessionDestroyed(HttpSessionEvent arg0) { // Executed when session fails SimpleDateFormat simpleFormat = new SimpleDateFormat("mm-ss-ms"); String nowtimes = simpleFormat.format(new Date()); //System.out.println("session has expired. End time: " nowtimes); } }

After the configuration is completed and the session expires, it successfully enters the sessionDestroyed method and is ready to perform the page jump operation. Suddenly, I found out how to write a jump and was stunned. I continued to go online to consult the experts and found that this monitoring was done for some background statistical processing and could not realize the page jump function. I had to give up this method and start using filters to achieve it. 1. Add filter configuration in web.xml ?

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filter-class>com.orchestrall.web.helper.session.SessionFilter sessionFilter      /actions/*

2. Create a new SessionFilter class and implement the Filter interface.

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public class SessionFilterimplements Filter {

public void destroy() {

// TODO Auto-generated method stub }

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException {

HttpServletRequest httpRequest = (HttpServletRequest) request;

HttpServletResponse httpResponse = (HttpServletResponse) response; "/admin/login.jsp";

String url = httpRequest.getRequestURI();

String path = url.substring(url.lastIndexOf("/"));

// Timeout processing, ajax request timeout Set the timeout status. If the page request times out, a prompt will be returned and redirected if (path.indexOf(".action") != -1

// Determine whether it is an ajax request if (httpRequest.getHeader("x-requested-with") != null

&& httpRequest.getHeader("x-requested-with")

              .equalsIgnoreCase("XMLHttpRequest")) {

                                                             .

                     httpResponse.addHeader("loginPath", loginUrl); 🎜>

String str = "";

response.setContentType("text/html;charset=UTF-8");// Solve Chinese garbled characters Try {

PrintWriter writer = response.getWriter();

writer.write(str);

writer.flush();

             writer.close();

                                          (Exception                                                                                                                                                                                                                                                chain.doFilter(request, response);

}

}

@Override

public void init(FilterConfig arg0) throws ServletException {

                                                                                                                                                                                          

3. Client JS, used for ajax request session timeout

For jquery

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Ext.Ajax.on('requestcomplete',checkUserSessionStatus, this);     function checkUserSessionStatus(conn,response,options){         if(response.getResponseHeader("sessionstatus") == 'timeout'){             if(response.getResponseHeader("loginPath")){                 alert("会话过期，请重新登陆!");                 window.top.location.href = response.getResponseHeader("loginPath");             }else{                 alert("请求超时请重新登陆 !");             }         }     }

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$.ajax({     url:"test.html",     global:false//不触发全局ajax事件})

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