How to Specify a Default Error Page in web.xml?

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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