ServletResponse-演示控制客户端浏览器的缓存时间

package com.httpServletResponse;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//演示控制客户端浏览器的缓存时间
/**
 * Servlet implementation class ServletResponse5
 */
@WebServlet("/ServletResponse5")
public class ServletResponse5 extends HttpServlet {
 private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServletResponse5() {
        super();
        // TODO Auto-generated constructor stub
    }
 /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  response.setContentType("text/html;charset=utf-8");
  response.getWriter().write("大家好");
 //控制缓存时间
  //时间是从1970年1月1日0点0分0秒0毫秒开始
  response.setDateHeader("Expires", System.currentTimeMillis()+10000);
 }
 /**
  * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
  */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  doGet(request, response);
 }
}