JAVA 获取系统当前时间

 稍微做个记号:

网上查了,有两种办法
[1]

SimpleDateFormat tempDate  =   new  SimpleDateFormat( " yyyy-MM-dd "   +   "   "   +   " hh:mm:ss " ); 
String datetime  =  tempDate.format( new  java.util.Date()); 

[2]

Calendar now = Calendar.getInstance(); 
String time = now.get(Calendar.YEAR) + " - " + (now.get(Calendar.MONTH) + 1 ) + " - " + now.get(Calendar.DAY_OF_MONTH) + "   " + now.get(Calendar.HOUR_OF_DAY) + " : " + now.get(Calendar.MINUTE) + " : " + now.get(Calendar.SECOND);