package cn.easted.edm.core.utils;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @ClassName: NoCacheFilter
* @Description: 清除浏览器缓存过滤器
* @author Wh
* @date 2017年6月5日 上午9:18:45
*/
public class NoCacheFilter implements Filter{
@Override
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) resp;
//禁止浏览器缓存所有动态页面
response.setHeader("Pragma","no-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", -1);
chain.doFilter(request, response);
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
System.out.println("----过滤器初始化----");
}
@Override
public void destroy() {
System.out.println("----过滤器销毁----");
}
}
web.xml中配置：
<filter> <filter-name>NoCacheFilter</filter-name> <filter-class>cn.easted.edm.core.utils.NoCacheFilter</filter-class> <init-param> <param-name>exclusions</param-name> <!-- 排除统计干扰 --> <param-value>*.gif,*.jpg,*.png,*.css,*.ico</param-value> </init-param> </filter> <filter-mapping> <filter-name>NoCacheFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
