Customizing Error Handling in Web Applications
When users encounter errors on a web application, it's essential to provide informative and helpful error pages. The
Default Error Page for Unspecified Errors
To provide a default error page for errors not covered by explicit
Step 1: Using Servlet 3.0 or Newer
For Servlet 3.0 or newer, you can simply specify the default error page as follows:
<code class="xml"><web-app ...> <error-page> <location>/general-error.html</location> </error-page> </web-app></code>
Step 2: Using Servlet 2.5
For Servlet 2.5 and earlier versions, there is no built-in option to specify a default error page. However, you can work around this limitation by explicitly defining error pages for common HTTP errors:
<code class="xml"><error-page> <!-- Missing login --> <error-code>401</error-code> <location>/general-error.html</location> </error-page> <error-page> <!-- Forbidden directory listing --> <error-code>403</error-code> <location>/general-error.html</location> </error-page> <error-page> <!-- Missing resource --> <error-code>404</error-code> <location>/Error404.html</location> </error-page> <error-page> <!-- Uncaught exception --> <error-code>500</error-code> <location>/general-error.html</location> </error-page> <error-page> <!-- Unsupported servlet method --> <error-code>503</error-code> <location>/general-error.html</location> </error-page></code>
This specifies error pages for the most common HTTP errors, but you may need to adjust the list based on the specific errors your application may encounter.
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