[/Web-INF/src/validation/ ValidationServlet .java]

 

package validation;

import java.io.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;

import javax.servlet.*;
import javax.servlet.http.*;

public class ValidationServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        PrintWriter out = response.getWriter();

        boolean passed = validateDate(request.getParameter("birthDate"));
        response.setContentType("text/xml");
        response.setHeader("Cache-Control", "no-cache");
        String message = "You have entered an invalid date.";

if (passed) {         message = "You have entered a valid date.“;        }
        out.println("<response>");
        out.println("<passed>" + Boolean.toString(passed) + "</passed>");
        out.println("<message>" + message + "</message>");
        out.println("</response>");
        out.close();
     }

    private boolean validateDate(String date) {
        boolean isValid = true;
        if(date != null) {
            SimpleDateFormat formatter= new SimpleDateFormat("MM/dd/yyyy");
            try {
                formatter.parse(date);
            } catch (ParseException pe) {
                System.out.println(pe.toString());
                isValid = false;
            }
        } else {            isValid = false;        }
        return isValid;
    }
}