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ErrorDisplay.javaAPI DocExample1436Thu Apr 05 01:32:26 BST 2001None

ErrorDisplay

public class ErrorDisplay extends HttpServlet

Fields Summary
Constructors Summary
Methods Summary
public voiddoGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res)

    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("<HTML>");
    out.println("<HEAD><TITLE>" + reason + ": " + message + "</TITLE></HEAD>");
    out.println("<BODY>");
    out.println("<H1>" + reason + "</H1>");
    out.println("<H2>" + message + "</H2>");
    out.println("<HR>");
    out.println("<I>Error accessing " + req.getRequestURI() + "</I>");
    out.println("</BODY></HTML>");