1 案例分析

2 Java實現代碼

public class LastAccessTimeServlet extends HttpServlet {

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //獲得當前時間
        Date date = new Date();
　　　　　//將日期格式化一下
        SimpleDateFormat format 
 
= new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        String currentTime = format.format(date);
        
        //1、創建Cookie 記錄當前的最新的訪問時間
        Cookie cookie = new Cookie("lastAccessTime",currentTime);
        cookie.setMaxAge(60*10*500);
        response.addCookie(cookie);
        
        //2、獲得客戶端攜帶cookie ---- lastAccessTime
 

        String lastAccessTime = null;
        Cookie[] cookies = request.getCookies();
        if(cookies!=null){
            for(Cookie coo : cookies){
                if("lastAccessTime".equals(coo.getName())){
                    lastAccessTime = coo.getValue();
                }
            }
        }
        
        response.setContentType(
 
"text/html;charset=UTF-8");
        if(lastAccessTime==null){
            response.getWriter().write("您是第一次訪問");
        }else{
            response.getWriter().write("您上次的訪問的時間是："+lastAccessTime);
        }
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }
}

Cookie案例-顯示用戶的上次訪問時間代碼實現