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在 JSP 中添加 Expires 或 Cache-Control 标头

发布于 2024-09-05 13:26:27 字数 124 浏览 4 评论 0原文

如何在 JSP 中添加 Expires 或 Cache-Control 标头？我想在包含页面中为我的静态组件（例如图像、CSS 和 JavaScript 文件）添加一个远期到期日期。

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大海や 2024-09-12 13:26:27

要禁用 JSP 页面的浏览器缓存，请创建一个映射到 *.jsp 的 url-pattern 的 Filter，并在doFilter() 方法：

HttpServletResponse httpResponse = (HttpServletResponse) response;
httpResponse.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1
httpResponse.setHeader("Pragma", "no-cache"); // HTTP 1.0
httpResponse.setDateHeader("Expires", 0); // Proxies.

这样您就不需要将其复制粘贴到所有 JSP 页面上并使用 scriptlet 来混乱它们。

要为 CSS 和 JS 等静态组件启用浏览器缓存，请将它们全部放在一个公共文件夹中，例如 /static 或 /resources 并创建一个 Filter它映射到 /static/* 或 /resources/* 的 url-pattern 上，并且在 doFilter 中基本上执行以下操作() 方法：

httpResponse.setDateHeader("Expires", System.currentTimeMillis() + 604800000L); // 1 week in future.

另请参阅：

To disable browser cache for JSP pages, create a Filter which is mapped on an url-pattern of *.jsp and does basically the following in the doFilter() method:

HttpServletResponse httpResponse = (HttpServletResponse) response;
httpResponse.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1
httpResponse.setHeader("Pragma", "no-cache"); // HTTP 1.0
httpResponse.setDateHeader("Expires", 0); // Proxies.

This way you don't need to copypaste this over all JSP pages and clutter them with scriptlets.

To enable browser cache for static components like CSS and JS, put them all in a common folder like /static or /resources and create a Filter which is mapped on an url-pattern of /static/* or /resources/* and does basically the following in the doFilter() method:

httpResponse.setDateHeader("Expires", System.currentTimeMillis() + 604800000L); // 1 week in future.

See also:

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帅的被狗咬 2024-09-12 13:26:27

<%
    response.setHeader("Cache-Control", "no-cache");
    response.setDateHeader("Expires", 0);
%>

<%
    response.setHeader("Cache-Control", "no-cache");
    response.setDateHeader("Expires", 0);
%>

回复收藏 0 原文

尐偏执 2024-09-12 13:26:27

<%
    response.setHeader("Cache-Control", "no-cache"); //HTTP 1.1
    response.setHeader("Pragma", "no-cache"); //HTTP 1.0
    response.setDateHeader("Expires", 0); //prevents caching at the proxy server
%>

<%
    response.setHeader("Cache-Control", "no-cache"); //HTTP 1.1
    response.setHeader("Pragma", "no-cache"); //HTTP 1.0
    response.setDateHeader("Expires", 0); //prevents caching at the proxy server
%>

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