Jump to login page when session expires_html/css

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:

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.

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.

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);

}