import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ErrorDisplay extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/html");
PrintWriter out = res.getWriter();
String code = null, message = null, type = null;
Object codeObj, messageObj, typeObj;
// Retrieve the three possible error attributes, some may be null
codeObj = req.getAttribute("javax.servlet.error.status_code");
messageObj = req.getAttribute("javax.servlet.error.message");
typeObj = req.getAttribute("javax.servlet.error.exception_type");
// Convert the attributes to string values
if (codeObj != null) code = codeObj.toString();
if (messageObj != null) message = messageObj.toString();
if (typeObj != null) type = typeObj.toString();
// The error reason is either the status code or exception type
String reason = (code != null ? code : type);
out.println("");
out.println("" + reason + ": " + message + "");
out.println("");
out.println("" + reason + "
");
out.println("" + message + "
");
out.println("
");
out.println("Error accessing " + req.getRequestURI() + "");
out.println("");
}
}