java WEB Response重定向和缓存控制

package cn.com;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 ResponseChongdingxiang extends HttpServlet {private static final long serialVersionUID = 1L;   protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.sendRedirect("/Response/MyHtml.html");/*  response.setStatus(302); response.setHeader("location", "url=/Response/MyHtml.html");*/}protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doGet(request,response);}}package cn.com;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 ResponseHuancun extends HttpServlet {private static final long serialVersionUID = 1L;  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {String str="aaaaaaa";response.setDateHeader("expries", System.currentTimeMillis()+1000*3600);response.getWriter().write(str);}protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doGet(request,response);}}