Tomcat：缓存控制 [英] Tomcat: Cache-Control

问题描述

Jetty有 CacheControl参数（可以指定webdefault.xml）确定客户端的缓存行为（通过影响发送给客户端的标头）。

Jetty has a CacheControl parameter (can be specified webdefault.xml) that determines the caching behavior of clients (by affecting headers sent to clients).

Tomcat是否有类似的选项？
简而言之，我想关闭tomcat服务器和/或特定网络应用程序提供的所有页面的缓存？

Does Tomcat has a similar option? In short, I want to turn off caching of all pages delivered by a tomcat server and/or by a specific webapp?

更新

请注意，我不是指服务器端缓存。我希望服务器告诉所有客户端（浏览器）不要使用自己的缓存并始终从服务器获取内容。我想一次为所有资源做这件事，包括静态资源（.css，.js等）。

Please note that I am not referring to server-side caching. I want the server to tell all clients (browsers) not to use their own cache and to always fetch the content from the server. I want to do it for all resources, including static resources (.css, .js, etc.) at once.

推荐答案

与上面的帖子类似，除了该代码存在一些问题。这将禁用所有浏览器缓存：

Similar to the post above, except there are some issues with that code. This will disable all browser caching:

import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Date;

public class CacheControlFilter implements Filter {

    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain) throws IOException, ServletException {

        HttpServletResponse resp = (HttpServletResponse) response;
        resp.setHeader("Expires", "Tue, 03 Jul 2001 06:00:00 GMT");
        resp.setDateHeader("Last-Modified", new Date().getTime());
        resp.setHeader("Cache-Control", "no-store, no-cache, must-revalidate, max-age=0, post-check=0, pre-check=0");
        resp.setHeader("Pragma", "no-cache");

        chain.doFilter(request, response);
    }

}

然后在web.xml中映射如 Stu Thompson的答案中所述。

and then map in web.xml as described in Stu Thompson's answer.

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