public String generateToken(Authentication authentication) {

        UserPrincipal userPrincipal = (UserPrincipal) authentication.getPrincipal();

        Date now = new Date();
        Date expiryDate = new Date(now.getTime() + jwtExpirationInMs);
        System.out.println("Curent time: " + new Date(new Date().getTime()));
        System.out.println("expiryDate: " + expiryDate);

        return token = Jwts.builder()
                .setSubject(Long.toString(userPrincipal.getId()))
                .setIssuedAt(new Date())
                .setExpiration(expiryDate)
                .signWith(SignatureAlgorithm.HS512, jwtSecret)
                .claim("TEST", "lololo")
                .compact();
    }

Curent time: Tue Apr 09 10:34:34 UTC 2019
expiryDate: Tue Apr 09 10:49:34 UTC 2019

    Long getUserIdFromJWT(String token) {
        Claims claims = Jwts.parser()
                .setSigningKey(jwtSecret)
                .parseClaimsJws(token)
                .getBody();

        System.out.println("Curent time: " + new Date(new Date().getTime()));
        System.out.println("Expiration time: " + claims.getExpiration());
        System.out.println("IssuedAt exp: " + claims.getIssuedAt());

        return Long.parseLong(claims.getSubject());
    }

Curent time: Tue Apr 09 10:35:01 UTC 2019
Expiration time: Mon Apr 15 09:46:31 UTC 2019
IssuedAt exp: Mon Apr 08 09:46:31 UTC 2019

new Date()