获取当前月之前的5个月 格式 xxxx年xx月-xxxx年xx月

    var date = new Date()
    var currentYear = date.getFullYear();
    var firstYear = date.getFullYear();
    var firstMonth = date.getMonth() + 1;
    var currentMonthStr = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
    var endTime = currentYear + currentMonthStr
    for (var i = 0; i < 5; i++) {
      firstMonth--;
      if (firstMonth < 1) {
        var firstYear = firstYear - 1;
        var firstMonth = 12
      }
    }
    if (String(firstMonth).length == 1) {
      firstMonth = '0' + firstMonth
    }
    var startTime = String(firstYear) + String(firstMonth)
    var requestTime = startTime +  '-' + endTime