应用避免访问浏览器缓存

 

 

项目经常遇到这么个问题:程序做了改动之后,由于浏览器存在缓存,用户看到的依旧是程序未改动时的效果。

可以尝试的解决方案有:

a)url后添加随机数

b)修改html头标记

c)修改ie浏览器不查看缓存或者不保存历史记录

d)清理缓存

etc...

 

今天尝试了用过滤器的方法,好使,给力。

 

package ******;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.HttpServletResponse;

public class ForceNoCacheFilter implements Filter {
	
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
		((HttpServletResponse) response).setHeader("Cache-Control", "no-cache");
		((HttpServletResponse) response).setHeader("Pragma", "no-cache");
		((HttpServletResponse) response).setDateHeader("Expires", -1);
		filterChain.doFilter(request, response);
	}
	
	public void destroy() {
	}
	
	public void init(FilterConfig filterConfig) throws ServletException {
	}
}

 

	<filter>
	     <filter-name>NoCache</filter-name>
	     <filter-class>过滤器的包名.类名</filter-class>
	</filter>
	<filter-mapping>
	     <filter-name>NoCache</filter-name>
	     <url-pattern>/*</url-pattern>
	</filter-mapping>

 

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