To make a pop-up window for update success and failure messages and auto redirect to a login page, you need to use JavaScript. Here's an example:

java
 
 
Copy code
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/UpdateDataServlet")
public class UpdateDataServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();

        // Database connection details
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String username = "root";
        String password = "root";

        // Get values from the request parameter
        String id = request.getParameter("id");
        String name = request.getParameter("name");
        String age = request.getParameter("age");

        try {
            // Establish database connection
            Class.forName("com.mysql.jdbc.Driver");
            Connection con = DriverManager.getConnection(url, username, password);

            // Create an SQL update statement
            String query = "UPDATE mytable SET name=?, age=? WHERE id=?;";
            PreparedStatement pst = con.prepareStatement(query);

            // Set values to the statement
            pst.setString(1, name);
            pst.setString(2, age);
            pst.setString(3, id);

            // Execute the SQL update statement
            int rowsUpdated = pst.executeUpdate();

            if(rowsUpdated > 0) {
                out.println("<script>alert('Data updated successfully!'); window.location.href='login.html';</script>");
            } else {
                out.println("<script>alert('Failed to update data!'); window.location.href='login.html';</script>");
            }

            // Close database resources
            pst.close();
            con.close();

        } catch (ClassNotFoundException | SQLException e) {
            out.println(e.getMessage());

        } finally {
            out.close();
        }
    }
}

This code block is similar to the previous example, but with modifications for showing a pop-up window for the success or failure of the update and auto-redirecting to a login page. This will require an HTML file named login.html to be present in the project folder.

When successful, the update message will be shown in a pop-up window and the page will automatically redirect to the login page. If there's a failure, a similar pop-up window will be shown, and the page will redirect to the login page.

Please note that pop-up windows may not be supported by all browsers, and it can be an intrusive experience for users. Also, in practice, it's better to have the user interface for update messages incorporated within the main user interface instead of using pop-ups.