public class LastData extends HttpServlet {	/*	 * curdata:當前時間	 * lasttime:記錄最后一次訪問時間	 */	public void doGet(HttpServletRequest request, HttpServletResponse response)			throws ServletException, IOException {		response.setContentType("text/html;charset=utf-8");		//制作當前時間字符串		SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd號，hh時mm分ss秒");		String curdata = sdf.format(new Date());		System.out.PRintln("獲取時間為"+curdata);		//獲取cookie		Cookie[] cookies = request.getCookies();		String lasttime = null;		//如果不是第一次訪問		if(cookies!=null){			for(Cookie cookie:cookies ){				//獲取cookie的值				lasttime = cookie.getValue();				//將中文解密				lasttime = URLDecoder.decode(lasttime,"utf-8");				//打印到頁面				response.getWriter().write("歡迎再次光臨本網(wǎng)站，當前時間為："+lasttime);				response.getWriter().write("<br/>當前時間為："+curdata);				curdata = URLEncoder.encode(curdata,"utf-8");				//保存新的時間到Cookie中				cookie.setValue(curdata);				//將cookie信息發(fā)送到瀏覽器保存				response.addCookie(cookie);					break;			}		}		//第一次訪問時		if(cookies==null||lasttime==null){			response.getWriter().write("歡迎光臨本網(wǎng)站，當前時間為：");			//將中文信息加密			curdata = URLEncoder.encode(curdata,"utf-8");			//將當前信息保存到cookie中			Cookie c = new Cookie("lasttime", curdata);			//將cookie信息保存到瀏覽器中			response.addCookie(c);		}			}}