将Java Date转换为Epoch会得出错误的结果

Question

I am converting java Date object to epoch using code :

        String str = "" + date;
        SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd HH:mm:ss.SSS");
        Date formateDate = df.parse(str);
        long epoch = formateDate.getTime();
        return epoch;

If I test this with value 2013-04-26 08:34:55.705 then it gives Long as 1359189295705 which is actually Sat, 26 Jan 2013 08:34:55 GMT but its Friday today why does it say that its Saturday on 26th January 2013.

Answer 1

It's using January not April . January 26th was indeed a Saturday. It's given you the wrong month because your date format is wrong:

yyyy-mm-dd HH:mm:ss.SSS

You're using mm for the month, when you should be using MM . The date format should be:

yyyy-MM-dd HH:mm:ss.SSS

Your format didn't specify the month anywhere, so presumably it just defaulted to January.

Answer 2

month的格式不正确，应为yyyy-MM-dd ，因此默认为您的第一个月。