Java and Javascript getTime give different values

Asked Mar 19 '19 at 13:15

Active Mar 19 '19 at 14:17

Viewed 121 times

I need to compare dates. One date is gotten from JWT and the other is gotten from Javascript getTime(). But the 2 dates that should bre relatively close have a differents of X1000.

Javascript getTime() -> 1553001077175 Java JWT expiration -> 1553087477

I get the expiration from JWT by doing the base64 conversion.

JWT expiration is calculated as follows:

long now = (new Date()).getTime();
        Date validity;
        validity = new Date(now + this.tokenValidityInMilliseconds);

And then butten into JWT like so:

Jwts.builder()....setExpration(validity).compact()

Why is the difference so large?

asked Mar 19 '19 at 13:15

Marko Taht

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Different timezones between client and server? Someone forgot to set DST on server? `console.log(new Date(1553001077175), new Date(1553087477000))` – mplungjan Mar 19 '19 at 13:20
It looks like somewhere in the compacting, sending and decoding the final 3 numbers get lost. – Marko Taht Mar 19 '19 at 13:34
Java unix timestamp is likely in seconds – mplungjan Mar 19 '19 at 13:47
I dug into the JWTS libary. and in the bowels i discovered that it does getTime() / 1000L. I wish i could have found some documentations aobut it.... – Marko Taht Mar 19 '19 at 13:52
@mplungjan apparantley i used wrong keywords for search. – Marko Taht Mar 19 '19 at 14:25

Java and Javascript getTime give different values

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