如何获取当前系统时间的时间戳

import systemDateTime from '@ohos.systemDateTime';
import { BusinessError } from '@kit.BasicServicesKit';

try {
  systemDateTime.getCurrentTime(true, (error: BusinessError, time: number) => {
    if (error) {
      console.info(`Failed to get currentTime. message: ${error.message}, code: ${error.code}`);
      return;
    }
    console.info(`Succeeded in getting currentTime : ${time}`);
  });
} catch (e) {
  console.info(`Failed to get currentTime. message: ${e.message}, code: ${e.code}`);
}