System.currentTimeMillis是否代表UTC时间？

Question

System.currentTimeMillis()表示UTC时间还是本地系统时间？

Answer 1

UTC - it's the number of milliseconds since midnight on January 1st 1970 UTC (modulo leap seconds, potentially).

Obviously it's reliant on the local system clock , but it doesn't depend on the local system time zone .

(It's a shame that the Javadoc isn't clearer on this, admittedly.)

Answer 2

UTC according to oracle.com. http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/System.html#currentTimeMillis

"currentTimeMillis

Returns:

the difference, measured in milliseconds, between the current time and midnight, January 1, 1970 UTC."