JSP page display problems (Org. Apache. Jasper. jasperexception: Unable to compile class for JSP)

I checked the information about the problem online:

The solution provided on the Internet is as follows:

1. This error occurs during struts running. The solution is to copy java_home/lib/tools. jar to atat_home/common/lib. (I DID NOT delete the original tools. jar file, but changed the name)

The following describes how to solve the problem:

2. if the system is correctly configured, the Operation permission may be incorrect. You must use the same permissions to delete the work folder under the replicate directory, and then restart the system.