1     public static void main(String[] args) throws Exception{//判断某个时间是否为当前时间 2         String dataStr="2014-07-24 12:16:04"; 3         Date createTime=new Date(System.currentTimeMillis()); 4         DateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  5         Date d=dateformat.parse(dataStr); 6         Date currentTime=new Date(); 7         long time=currentTime.getTime()-d.getTime();//当前时间与发送时间的差值  8         boolean flag=time<=(long)(60*60*24*1000); 9         System.out.println("createTime"+createTime.getTime());10         System.out.println("cureentTime"+currentTime.getTime());11         System.out.println("d"+d.getTime());12         System.out.println("flag"+flag);13     }14     

public static void main(String[] args){  String date="2099-12-12";  DateFormat dateformat = new SimpleDateFormat("yyyy-MM-dd");   Date d1;  try {   d1 = dateformat.parse(date);   Date d2=new Date();   if(d1.before(d2)){   System.out.println("字符串的时间早于电脑时间！");   }   if(d1.after(d2)){   System.out.println("字符串的时间晚于电脑时间！");   }  } catch (ParseException e) {   // TODO Auto-generated catch block   e.printStackTrace();  }   }