Specify the Default Error Page in web.xml
In web application development, it's crucial to provide users with user-friendly error pages when an error occurs. The error-page element in web.xml allows developers to specify custom error pages for specific error codes. However, it may be desirable to display a default error page for errors that are not explicitly defined in error-pages.
Servlet 3.0 and Above
For Servlet 3.0 or newer, the default error page can be specified with a single error-page element:
<code class="xml"><web-app ...> <error-page> <location>/general-error.html</location> </error-page> </web-app></code>
This error page will be displayed for any error that is not handled by a more specific error-page element.
Servlet 2.5 and Below
For Servlet 2.5 and below, there is no direct way to specify a default error page. Instead, it's necessary to define error-page elements for each common HTTP error code. For example:
<code class="xml"><error-page> <error-code>401</error-code> <location>/general-error.html</location> </error-page> <error-page> <error-code>403</error-code> <location>/general-error.html</location> </error-page> <error-page> <error-code>500</error-code> <location>/general-error.html</location> </error-page></code>
This approach covers the most common HTTP error codes, ensuring that users see a user-friendly error page in most cases.
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