Resolve the issue of org.apache.jasper.JasperException unable to compile JSP class

The org.apache.jasper.JasperException is a JSP compilation exception, typically caused by errors in the JSP code or configuration issues.

To solve this issue, you can troubleshoot and fix it by following these steps:

1. Check for syntax or logic errors in the JSP code. Identify the specific location and reason for the errors by reviewing error prompts or log files in the JSP file. Fix any errors in the code.
2. Check if the JSP configuration is correct. Make sure that the servlet and servlet-mapping for JSP are properly configured in the web.xml file. For example, ensure that the servlet-class configuration is correct and that the url-pattern is set up correctly.
3. Check if JSP dependencies are correctly imported. Sometimes missing required libraries or mismatched versions can cause compilation errors. Make sure all necessary dependencies are properly imported and their versions match.
4. Delete the temporary files generated during compilation. After JSP compilation, certain temporary files are created, which may occasionally become corrupted or conflict, resulting in compilation errors. You can try deleting the compiled temporary files and then recompiling.
5. Check the logs of the JSP container. Sometimes during the JSP compilation process, more detailed error information is written to the container’s logs. Reviewing the log file can provide additional clues to help solve the issue.

If the above methods do not solve the problem, you can try upgrading the related software version, or consult official documentation, forums, or communities for more help.