应用refresh、expires、cache-control、pragma控制浏览器刷新及缓存

使用refresh、expires、cache-control、pragma控制浏览器刷新及缓存

package cn.itcast.web.http;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Demo5 extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		//服务器控制浏览器定时刷新后转到指定的页面
		response.setHeader("refresh","3;url=/day05/welcome.html");
//服务器控制浏览器不缓存页面数据
		//response.setHeader("expires","-1");
		//response.setHeader("cache-control","no-cache");
		//response.setHeader("pragma","no-cache");
	}
}