public static long unixTimestamp() {
    return System.currentTimeMillis() / 1000;
  }
Returns a Unix timestamp in seconds since '1970-01-01 00:00:00' UTC as an unsigned integer.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/util/DateTimeUtils.java