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23 KiB
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java web.xml定义配置错误页面及使用
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<time title="创建时间：2012-08-16 00:00:00" itemprop="dateCreated datePublished" datetime="2012-08-16T00:00:00+10:00">2012-08-16</time>
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<span class="post-meta-item-text">更新于</span>
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<time title="修改时间：2026-08-04 20:47:21" itemprop="dateModified" datetime="2026-08-04T20:47:21+10:00">2026-08-04</time>
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<div class="post-body" itemprop="articleBody"><p>我们在开发java web 的程序时候，经常会需要给用户提示信息，或者页面。最常见的，比如用户输入了一个不存在的网址，默认情况下Tomcat会给用户返回一个默认的页面。如下所示：</p>
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<p><a href="/images/2012/08/22.jpg"><img src="/images/2012/08/22.jpg" title="22"></a></p>
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<p>这个页面千篇一律。我们完全可以给用户展示一个自定义的页面。</p>
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<p>其实java web程序中web.xml 本身就支持自定义错误页面，我们只需要在web.xml添加如下信息：</p>
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<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">404</span><br><span class="line">/errorpage/404.html</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">401</span><br><span class="line">/errorpage/401.html</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">500</span><br><span class="line">/errorpage/500.html</span><br><span class="line"></span><br></pre></td></tr></table></figure>
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<p>当然“error-code”，可以自己选择在程序中出现得最多的错误码。我个人认为通常我们拦截：</p>
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<p>401：未授权</p>
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<p>404：没有找到页面</p>
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<p>500：服务器内部错误</p>
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<p>这三个即可。在“location”中配置你自己的html,当然页面样式，内容这些这些都可以自己定义。这个就看你自己啦。</p>
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<p>如果我们不做其他操作，当系统出现这些错误情况时，服务器就会自动调用我们配置的网页。当然我们可以自行在恰当的时候使用它。</p>
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<p>在servlet或者其他可能访问到HttpServletResponse对象的地方，使用：</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">response.sendError(<span class="number">404</span>); <span class="comment">//404为你需要的错误代码</span></span><br><span class="line"></span><br><span class="line"><span class="comment">//也可以向前台网页传输错误语句，不过前台网页需要相应支持。这里没有实现</span></span><br><span class="line"></span><br><span class="line">response.sendError(<span class="number">404</span>,<span class="string">"这里写想要输出到前台的提示信息"</span>);</span><br></pre></td></tr></table></figure>
|
||
|
||
<p>在java中还可以使用：</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">response.setStatus(<span class="number">404</span>); <span class="comment">//设置状态码</span></span><br></pre></td></tr></table></figure>
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||
|
||
<p>设置状态码来实现，不过这并不能调用配置的自定义页面。只是在前台显示错误，并无输出。</p>
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<strong>本文作者： </strong>Junv
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<strong>本文链接：</strong>
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<a href="https://toozhao.com/2012/08/15/java-web-define-error-page/" title="java web.xml定义配置错误页面及使用">https://toozhao.com/2012/08/15/java-web-define-error-page/</a>
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<strong>版权声明： </strong>本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" rel="noopener" target="_blank"><i class="fab fa-fw fa-creative-commons"></i>BY-NC-SA</a> 许可协议。转载请注明出处！
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<a href="/tags/java/" rel="tag"># java</a>
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<a href="/tags/web/" rel="tag"># web</a>
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<a href="/tags/web-xml/" rel="tag"># web.xml</a>
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