Просмотр исходного текста страницы Java by API/javax.servlet/javax.servlet.error

== javax.servlet.error.exception_type ==






   
  <!-- start source code -->
   
    <source lang="java">
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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("<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>");
  }
}
           
       </source>
    
   
  <!-- end source code -->
   




== javax.servlet.error.message ==






   
  <!-- start source code -->
   
    <source lang="java">
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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("<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>");
  }
}
           
       </source>
    
   
  <!-- end source code -->
   




== javax.servlet.error.status_code ==






   
  <!-- start source code -->
   
    <source lang="java">
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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("<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>");
  }
}
           
       </source>
    
   
  <!-- end source code -->