我需要杀死会话并在浏览器关闭或制表符关闭后执行一个功能

Question

I want to kill session after browser close or tab close.And I need to do one database connectivity after the session get expires using Session Listener.But, for that I need to wait until the session destroys.

Here is the code which executes when the session destroyed.

public void sessionDestroyed(HttpSessionEvent event) {
        synchronized (this) {
            //System.out.println("deletion");
            ServletContext application = event.getSession().getServletContext();
            sessionCount = (Integer) application.getAttribute("SESSION_COUNT");
            application.setAttribute("SESSION_COUNT", sessionCount=sessionCount - 1);
            //application.setAttribute("SESSION_COUNT", --sessionCount);


            try
            {
                Class.forName("com.mysql.jdbc.Driver");
            }
            catch (ClassNotFoundException e) {
                System.out.println("" + e);
            }

            Connection connection = null;
            try {
                connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/raptor1_5", "root", "");
                Statement st = connection.createStatement();

                st.executeUpdate("update adminlogin set Password='admin' where Username='admin'");  

            }   catch (SQLException e) {
                e.printStackTrace();
            }

        }
        System.out.println("Session Destroyed: " + event.getSession().getId());
        System.out.println("Total Sessions after delete: " + sessionCount);
    }

But, I don't want to wait until the session destroys.I need to do this code after the browser gets close.Hope someone will get me out of this.

Thank you

Answer 1

If you use jquery you can listen for the unload event

https://api.jquery.com/unload/

or using JS

 window.onbeforeunload = function() {...

Then of couse you could fire some ajax to call the server side code.

Answer 2

Detect the Browser's Close Event and Invalidate Session using

if(session!=null) { 
session.invalidate();   
}   

How to detect browser Close Event ?

$(document).ready(function()
{
 $(window).bind("beforeunload", function() { 
   return confirm("Do you really want to close?"); // here you can invalidate
 });
});

---

Update

How to differentiate between Browser Close and Refresh Event ??