public static long unixTimestamp(String dateStr, TimeZone tz) {
    return unixTimestamp(dateStr, TIMESTAMP_FORMAT_STRING, tz);
  }
Returns the value of the argument as an unsigned integer in seconds since '1970-01-01 00:00:00'
UTC.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/util/DateTimeUtils.java