Java Web Application Employee Management System - Troubleshooting Blank Page - 常规

There are a few possible reasons why the page might be blank when trying to view employees:

'Database Connection': Ensure that you have established a successful connection to the database. Check if the database URL, username, and password are correct. Also, check if the database server is running.
'SQL Query': Verify that the SQL query used to retrieve the employee data is correct. Double-check the table and column names, as well as the query syntax.
'ResultSet Handling': Review the code that handles the ResultSet and converts it into a list of employee objects. Check if the ResultSet has any data and if the data is correctly mapped to the employee object.
'Servlet Mapping': Make sure that the servlet responsible for handling the 'select.do' request is correctly mapped in the 'web.xml' or using annotations. Verify that the request URL matches the servlet mapping.
'Server Configuration': Check the server logs for any error messages or exceptions that might provide more information about the issue.

By investigating these possible causes, you should be able to identify the reason why the page is blank and rectify the issue.