Servlet中使用 Last-Modified、Expires和Cache-Control

 

long now = System.currentTimeMillis();
long expires = System.currentTimeMillis() + (1000 * 60 * minutes);

response.addDateHeader("Expires", expires);
response.addDateHeader("Last-Modified", now);
response.setHeader("Cache-control", "public, max-age=" + minutes * 60);

 

 

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