public String gettime()
    {
       Calendar cal=Calendar.getInstance();
       int year=cal.get(Calendar.YEAR);
       int month=cal.get(Calendar.MONTH);
       int date=cal.get(Calendar.DAY_OF_MONTH);  
       int hour=cal.get(Calendar.HOUR_OF_DAY);
       int minute=cal.get(Calendar.MINUTE);
       String year1=String.valueOf(year);
       String month1=String.valueOf(month);
       String date1=String.valueOf(date);
       String hour1=String.valueOf(hour);
       String minute1=String.valueOf(minute);
       return (year1+"-"+month1+"-"+date1+" "+hour1+":"+minute1);
       
    }

public String gettime()
   {
      SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");//设置日期格式
      return df.format(new Date());// new Date()为获取当前系统时间
   }