Java Web 员工管理系统：解决查看员工页面空白问题

There could be several reasons why the 'select' action is displaying a blank page. Here are a few possible reasons and how to troubleshoot them:

1. Check if the DAO implementation is returning any data:

   • Make sure that the Allemp() method in the emsdaoimpl class is properly implemented and retrieving the data from the database.
   • Verify that the datautil class is correctly mapping the result set to the employee objects.
   • Debug the code by adding print statements or using a debugger to see if any data is retrieved from the database.

2. Check if the servlet is properly forwarding the data to the JSP page:

   • Ensure that the servlet is calling the selectEmployee method and retrieving the list of employees.
   • Verify that the JSP page is properly displaying the data received from the servlet.
   • Debug the code by adding print statements or using a debugger to see if the list of employees is being passed to the JSP page.

3. Check if the JSP page is properly displaying the data:

   • Review the HTML table structure in the JSP page and ensure that it is correctly formatted.
   • Check if any CSS or JavaScript code in the JSP page is causing display issues.
   • Debug the code by adding print statements or using a browser developer tool to inspect the HTML output of the JSP page.

By troubleshooting these areas, you should be able to identify the cause of the blank page issue and resolve it accordingly.