Your question has been answered here: "Where are compiled JSP Java (*_jsp.java) files?".
The compiled JSP files are by default available in the /work folder of the Tomcat environment.
Or, if you're using Eclipse IDE and publish the application within the workspace, which is the default behaviour, you may find the work directory in some path like:
workspace.metadata.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\HelloWorld\org\apache\jsp\test_jsp.class
However, if you want all the compiled JSP (*_jsp.class) files, you have these options: Use Tomcat jspc tool with ant as instructed on the documentation; use wget to recursively request all the *.jsp pages from the tomcat server by issuing a command like below, or use your IDE's precompile JSP pages option to let the IDE do the job for you.
wget -r --no-parent -A.jsp http://domain/your-project/
so that it should all be cached by tomcat now.