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Web. XML configuration error page, and output error message

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Author: User
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1. Need to configure relevant information in Web. xml

[HTML]View Plaincopy print?
  2. <!--default error handling page--
  4. <error-page>
  6. <error-code>403</error-code>
  8. <location>/403.html</location>
  10. </error-page>
  12. <error-page>
  14. <error-code>404</error-code>
  16. <location>/404.html</location>
  18. </error-page>
  20. <!--just stare at commissioning and cannot be commented out during a formal deployment
  22. <!--This configuration is also possible, indicating that a 500 error occurred, go to 500.jsp page processing. -
  24. <error-page>
  26. <error-code>500</error-code>
  28. <location>/500.html</location>
  30. </error-page>
  34. <!--Such a configuration means that if a JSP page or a servlet occurs with an java.lang.Exception type (which of course contains subclasses), the exception goes to 500.jsp page processing. -
  36. <error-page>
  38. <exception-type>java.lang.exception</exception-type>
  40. <location>/500.jsp</location>
  42. </error-page>
  46. <error-page>
  48. <exception-type>java.lang.throwable</exception-type>
  50. <location>/500.jsp</location>
  52. </error-page>
  54. <!--
  56. When both Error-code and Exception-type are configured, the page priority of the Exception-type configuration is high
  58. And a 500 error occurred, the exception exception will jump to 500.jsp
  60. -->
<!--default error Handling page--><error-page><error-code>403</error-code> <location>/403.html</location></error-page><error-page><error-code>404</ error-code><location>/404.html</location></error-page><!--just stare at debugging and cannot be annotated during a formal deployment- ><!--This configuration is also possible, indicating that a 500 error occurred, go to 500.jsp page processing. --><error-page> <error-code>500</error-code> <location>/500.html</location> < /error-page> <!--Such a configuration means that if a JSP page or servlet occurs java.lang.Exception type (of course, it contains subclasses) the exception goes to 500.jsp page processing. --><error-page> <exception-type>java.lang.Exception</exception-type> <location>/500. jsp</location> </error-page> <error-page> <exception-type>java.lang.throwable</ exception-type> <location>/500.jsp</location> </error-page><!-- When both Error-code and Exception-type are configured, the Exception-type configuration has a high page priority and a 500 error, which jumps to 500.jsp--> when an exception exception occurs;

2. If the configuration is HTML, do not configure it separately

If the configuration is JSP, you need to set Iserrorpage to True,

and <%@ page language= "java" contenttype= "text/html; Charset=utf-8 "pageencoding=" UTF-8 "iserrorpage=" true "%>

3. Get exception information and output

[HTML]View Plaincopy print?
  2. <% @page import="java.io.PrintStream"%>
  4. <% @page import="java.io.ByteArrayOutputStream"%>
  6. <%@ include file="web-inf/views/includes/tags.jsp"%>
  8. <%@ page language="java" contenttype="text/html; Charset=utf-8 "
  10. pageencoding="UTF-8" iserrorpage="true"%>
  12. <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd">
  14. <html>
  16. <head>
  18. <Meta http-equiv= "content-type" content= "text/html; Charset=utf-8 ">
  20. <title>500 Server Internal error </title>
  22. </head>
  24. <body>
  26. <div class="Ui-alert-panel">
  28. <H1> server Internal error </H1>
  30. <p> An error occurred while processing your request! Please make sure you are working in the right way. </P>
  32. </div>
  34. <div style="Display:none;" >
  36. <%//Here output exception information
  38. Exception.printstacktrace ();
  42. Bytearrayoutputstream ostr = new Bytearrayoutputstream ();
  44. Exception.printstacktrace (New PrintStream (OSTR));
  46. Out.print (OSTR);
  48. %>
  50. </div>
  52. </body>
  54. </html> 
<% @page import= "Java.io.PrintStream"%><% @page import= " Java.io.ByteArrayOutputStream "%><%@ include file=" web-inf/views/includes/tags.jsp "%><%@ page language= "Java" contenttype= "text/html; Charset=utf-8 "pageencoding=" UTF-8 "iserrorpage=" true "%><! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd" >
 Web. XML configuration error page, and output error message

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