How to set the timeout in the web application? - Daily Life

I have tried several methods to modify the value of the timeout for my current project. I find modify the web configuration file (web.xml) is the easiest way to implement it.

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app

    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

    "http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>

    <display-name>

      The name of the application

    </display-name>

    <description>

      C'mon, you know what goes into a description, don't you?

    </description>

    <context-param>

      <param-name>name_of_context_initialization_parameter</param-name>

      <param-value>value_of_context_initializtion_parameter</param-value>

      <description> Again, some description </description>

    </context-param>

    <servlet>

      <servlet-name>guess_what_name_of_servlet</servlet-name>

      <description>Again, some description</description>

      <servlet-class>com.foo-bar.somepackage.TheServlet</servlet-class>

      <init-param>

        <param-name>foo</param-name>

        <param-value>bar</param-value>

      </init-param>

    </servlet>

    <servlet-mapping>

      <servlet-name>name_of_a_servlet</servlet-name>

      <url-pattern>*.some_pattern</url-pattern>

    </servlet-mapping>

    <servlet-mapping>

      <servlet-name>image</servlet-name>

      <url-pattern>/image</url-pattern>

    </servlet-mapping>

    <session-config>

      <session-timeout>30</session-timeout>

    </session-config>

</web-app>

session-timeout

<session-timeout>: The timeout for a session in minutes. If you want to modify the default timeout value, do it here.

In another way, you can use the JavaScript function window.setTimeout(…) to set the timeout value and do what you want it to do when the page is overtime.