type DatePattern = 'yyyyMMdd' | 'yyyy-MM-dd' | 'yyyyMMddHHmmss' | 'HHmmss' | 'MM月dd日' | 'MM-dd HH:mm'

export class DateUtils {

  static formatDate(date: Date, pattern: DatePattern = 'yyyyMMdd'): string {
    let year = ""
    let month = ""
    let day = ""
    let hour = ""
    let minute = ""
    let second = ""
    try {
      year = date.getFullYear().toString();
      month = ('0' + (date.getMonth() + 1)).slice(-2);
      day = ('0' + date.getDate()).slice(-2);
      hour = ('0' + date.getHours()).slice(-2);
      minute = ('0' + date.getMinutes()).slice(-2);
      second = ('0' + date.getSeconds()).slice(-2);
    } catch (e) {
      //日志获取失败
      return ""
    }
    if (pattern == 'yyyy-MM-dd') {
      return year + '-' + month + '-' + day
    } else if (pattern == 'yyyyMMddHHmmss') {
      return year + month + day + hour + minute + second
    } else if (pattern == 'HHmmss') {
      return hour + minute + second
    } else if (pattern == 'MM月dd日') {
      return month + '月' + day + '日'
    } else if (pattern == 'MM-dd HH:mm') {
      return month + '-' + day + ' ' + hour + ':' + minute
    } else {
      return year + month + day
    }
  }
}