code: public static Date localDateToDate(LocalDate localDate) {
          ZoneId zone = ZoneId.systemDefault();
          Instant instant = localDate.atStartOfDay().atZone(zone).toInstant();
          return Date.from(instant);
      }
docs: 将java.time.LocalDate转换为java.util.Date
  
  @param localDate java.time.LocalDate
  
  @return java.util.Date