cachefilter.java

运用jsp/servlet技术 通过bs方式 在网上购买MP3

package com.filter;

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.HttpServletResponse;

public class CacheFilter implements Filter {


	public void destroy() {
		// TODO Auto-generated method stub

	}


	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		 HttpServletResponse response=(HttpServletResponse)arg1;
		 response.setHeader("Cache-Control","no-cache");
		 response.setHeader("Pargma", "no-cache");
		 response.setHeader("Expires", "0");
		 arg2.doFilter(arg0, response);
	}   


	public void init(FilterConfig arg0) throws ServletException {
		
	}

}