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(""); } }