How do I specify a default error page in web.xml for unhandled exceptions?-javaTutorial-php.cn

How do I specify a default error page in web.xml for unhandled exceptions?

Mary-Kate Olsen

Release： 2024-11-01 07:43:31

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How do I specify a default error page in web.xml for unhandled exceptions?

How to Specify a Default Error Page in web.xml

In web.xml, the element is used to assign a friendly error page for a specific error like 404. However, what if the user encounters an error beyond the codes specified within ? How do we handle that situation using the element in web.xml?

For Servlet 3.0 and above, the fix is simple:

<code class="xml"><web-app ...>
    <error-page>
        <location>/general-error.html</location>
    </error-page>
</web-app></code>

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For Servlet 2.5, where this feature is absent, the solution lies in explicitly defining common HTTP errors that users might encounter:

<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>

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This approach ensures that common errors are handled gracefully with custom error pages, providing a better user experience.

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