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/*
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* @Description: 假如我可以用程序回到某一年的某一天 我想我现在应该是开着豪车 搂着mm 不是在蹦迪就是在蹦迪的路上😏
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* @Author: Nathan暗黑时代
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* @Date: 2019-09-17 14:00:33
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*/
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import 'package:common_utils/common_utils.dart';
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class TimeMachineUtil {
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/**
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* 获取某一年的第一个月的第一天和最后一个月的最后一天
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*/
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static getStartEndYearDate(int iYear) {
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Map mapDate = new Map();
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int yearNow = DateTime.now().year;
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yearNow = yearNow + iYear;
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String newStartYear = '$yearNow' + '-' + '01' + '-' + '01';
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String newEndtYear = (yearNow + 1).toString() + '-' + '01' + '-' + '00';
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mapDate['startTime'] = DateUtil.formatDate(
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DateTime.fromMillisecondsSinceEpoch(turnTimestamp(newStartYear)),
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format: 'yyyy-MM-dd');
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mapDate['endTime'] = DateUtil.formatDate(
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DateTime.fromMillisecondsSinceEpoch(turnTimestamp(newEndtYear)),
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format: 'yyyy-MM-dd');
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mapDate['startStamp'] = turnTimestamp(mapDate['startTime'] + ' 00:00:00');
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mapDate['endStamp'] = turnTimestamp(mapDate['endTime'] + ' 23:59:59');
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print('某一年初和年末：$mapDate');
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}
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/**
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* 获得当前日期 未来/过去 第某个月第一天和最后一天时间
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*/
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static Map<String, String> getMonthDate(int iMonth) {
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//获取当前日期
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var currentDate = new DateTime.now();
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if (iMonth + currentDate.month > 0) {
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return timeConversion(
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iMonth + currentDate.month, (currentDate.year).toString());
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} else {
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int beforeYear = (iMonth + currentDate.month) ~/ 12;
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String yearNew = (currentDate.year + beforeYear - 1).toString();
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int monthNew = (iMonth + currentDate.month) - beforeYear * 12;
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return timeConversion(12 + monthNew, yearNew);
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}
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}
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static Map<String, String> timeConversion(int monthTime, String yearTime) {
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Map<String, String> dateMap = Map();
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dateMap['startDate'] = '$yearTime' +
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'-' +
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(monthTime < 10 ? '0' + monthTime.toString() : '$monthTime') +
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'-' +
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'01';
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//转时间戳再转时间格式 防止出错
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dateMap['startDate'] = DateUtil.formatDate(
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DateTime.fromMillisecondsSinceEpoch(
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turnTimestamp(dateMap['startDate'])),
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format: 'yyyy-MM-dd');
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//某个月结束时间，转时间戳再转
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String endMonth = '$yearTime' +
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'-' +
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((monthTime + 1) < 10
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? '0' + (monthTime + 1).toString()
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: (monthTime + 1))
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.toString() +
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'-' +
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'00';
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var endMonthTimeStamp = turnTimestamp(endMonth);
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endMonth = DateUtil.formatDate(
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DateTime.fromMillisecondsSinceEpoch(endMonthTimeStamp),
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format: 'yyyy-MM-dd');
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dateMap['endDate'] = endMonth;
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//这里是为了公司后台接口 需加时间段的时间戳 但不显示在格式化实践中
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dateMap['startDateStamp'] =
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turnTimestamp(dateMap['startDate'] + ' 00:00:00').toString();
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dateMap['endDateStamp'] =
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turnTimestamp(dateMap['endDate'] + ' 23:59:59').toString();
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print('过去未来某个月初月末：$dateMap');
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return dateMap;
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}
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/**
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* 转时间戳
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*/
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static int turnTimestamp(String timestamp) {
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return DateTime.parse(timestamp).millisecondsSinceEpoch;
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}
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/**
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* 当前时间 过去/未来 某个周的周一和周日
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*/
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static void getWeeksDate(int weeks) {
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Map<String, String> mapTime = new Map();
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DateTime now = new DateTime.now();
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int weekday = now.weekday; //今天周几
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var sunDay = getTimestampLatest(false, 7 - weekday + weeks * 7); //周末
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var monDay = getTimestampLatest(true, -weekday + 1 + weeks * 7); //周一
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mapTime['monDay'] =
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DateUtil.formatDate(DateTime.fromMillisecondsSinceEpoch(sunDay),
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// isUtc: true,
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format: 'yyyy-MM-dd'); //周一 时间格式化
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mapTime['sunDay'] = DateUtil.formatDate(
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DateTime.fromMillisecondsSinceEpoch(monDay),
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format: 'yyyy-MM-dd'); //周一 时间格式化
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mapTime['monDayStamp'] = '$monDay'; //周一 时间戳
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mapTime['sunDayStamp'] = '$sunDay'; //周日 时间戳
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print('某个周的周一和周日：$mapTime');
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}
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/**
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* phase : 是零点还是23:59:59
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*/
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static int getTimestampLatest(bool phase, int day) {
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String newHours;
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DateTime now = new DateTime.now();
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DateTime sixtyDaysFromNow = now.add(new Duration(days: day));
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String formattedDate = DateUtil.formatDate(sixtyDaysFromNow,
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// isUtc: true,
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format: 'yyyy-MM-dd');
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if (phase) {
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newHours = formattedDate + ' 00:00:00';
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} else {
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newHours = formattedDate + ' 23:59:59';
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}
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DateTime newDate = DateTime.parse(newHours);
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String newFormattedDate = DateUtil.formatDate(newDate,
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// isUtc: true,
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format: 'yyyy-MM-dd HH:mm:ss');
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int timeStamp = newDate.millisecondsSinceEpoch;
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// print('时间' + newFormattedDate);
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return timeStamp;
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}
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} |
...
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...
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