Three ways to set session timeout (expiration) in Java _java

1. Set in Web container (here, for example, Tomcat)
Set in Tomcat-5.0.28\conf\web.xml, the following is the default configuration in Tomcat 5.0:

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<!--==================== Default session Configuration =================-->
<!--can set the default session timeout (in minutes) to all newly-->
<!--created sessions by modifying the value below. -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>

The Tomcat default session timeout is 30 minutes and can be modified as needed, minus or 0 to not limit session expiration time.
2. Set up in the web.xml of the project

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<!--time Unit is minutes-->
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<session-config>
<session-timeout>15</session-timeout>
</session-config>

3. Set through Java code

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Session.setmaxinactiveinterval (30*60);//in seconds