Implementation of the persistent save of Tomcat implementation session ID

In general, if a user opens a browser, the server assigns a SessionID, and the Session.getid () function returns the ID of the session;

However, if once the server is shut down, the server restarts and the page is refreshed, the server will reassign a new SessionID;

If we want to retain the original ID, we can save the SessionID by serialization.

In Conf/server.xml, add in the context, Web project

<context path= "/test" docbase= "F:\JAVA WEB practice\tomcatproject" reloadable= "true" >
	<manager Classname= "Org.apache.catalina.session.PersistentManager" >
		debug=0		saveonrestart= "true"
		maxactivesession= "-1"	minidleswap= "-1"
		maxidleswap= "-1"		maxidlebackup= "-1"
		<store classname= "Org.apache.catalina.session.FileStore" directory= "F:\JAVA WEB practice\tomcatproject\temp"/>
	</manager >
</Context>

Indicates that the serial number exists under F:\JAVA WEB practice\tomcatproject\temp;

The effect of the implementation is this:

1. Open a Web page, the purpose of which is to output session ID;

2. To turn off Tomcat, a temporary file appears under the Temp folder;

3. Reboot Tomcat;

4. Refresh the page, the session ID unchanged;