网络编程
位置:首页>> 网络编程>> JavaScript>> JavaScript日期工具类DateUtils定义与用法示例

JavaScript日期工具类DateUtils定义与用法示例

作者:老鼠拧刀满街找猫  发布时间:2024-04-16 08:51:29 

标签:JavaScript,日期工具类,DateUtils

本文实例讲述了JavaScript日期工具类DateUtils定义与用法。分享给大家供大家参考,具体如下:


DateUtils = {
 patterns: {
  PATTERN_ERA: 'G', //Era 标志符 Era strings. For example: "AD" and "BC"
  PATTERN_YEAR: 'y', //年
  PATTERN_MONTH: 'M', //月份
  PATTERN_DAY_OF_MONTH: 'd', //月份的天数
  PATTERN_HOUR_OF_DAY1: 'k', //一天中的小时数(1-24)
  PATTERN_HOUR_OF_DAY0: 'H', //24小时制,一天中的小时数(0-23)
  PATTERN_MINUTE: 'm', //小时中的分钟数
  PATTERN_SECOND: 's', //秒
  PATTERN_MILLISECOND: 'S', //毫秒
  PATTERN_DAY_OF_WEEK: 'E', //一周中对应的星期,如星期一,周一
  PATTERN_DAY_OF_YEAR: 'D', //一年中的第几天
  PATTERN_DAY_OF_WEEK_IN_MONTH: 'F', //一月中的第几个星期(会把这个月总共过的天数除以7,不够准确,推荐用W)
  PATTERN_WEEK_OF_YEAR: 'w', //一年中的第几个星期
  PATTERN_WEEK_OF_MONTH: 'W', //一月中的第几星期(会根据实际情况来算)
  PATTERN_AM_PM: 'a', //上下午标识
  PATTERN_HOUR1: 'h', //12小时制 ,am/pm 中的小时数(1-12)
  PATTERN_HOUR0: 'K', //和h类型
  PATTERN_ZONE_NAME: 'z', //时区名
  PATTERN_ZONE_VALUE: 'Z', //时区值
  PATTERN_WEEK_YEAR: 'Y', //和y类型
  PATTERN_ISO_DAY_OF_WEEK: 'u',
  PATTERN_ISO_ZONE: 'X'
 },
 week: {
  'ch': {
   "0": "\u65e5",
   "1": "\u4e00",
   "2": "\u4e8c",
   "3": "\u4e09",
   "4": "\u56db",
   "5": "\u4e94",
   "6": "\u516d"
  },
  'en': {
   "0": "Sunday",
   "1": "Monday",
   "2": "Tuesday",
   "3": "Wednesday",
   "4": "Thursday",
   "5": "Friday",
   "6": "Saturday"
  }
 },
 //获取当前时间
 getCurrentTime: function() {
  var today = new Date();
  var year = today.getFullYear();
  var month = today.getMonth() + 1;
  var day = today.getDate();
  var hours = today.getHours();
  var minutes = today.getMinutes();
  var seconds = today.getSeconds();
  var timeString = year + "-" + month + "-" + day + " " + hours + ":" + minutes + ":" + seconds;
  return timeString;
 },
 /*
  * 比较时间大小
  * time1>time2 return 1
  * time1<time2 return -1
  * time1==time2 return 0
  */
 compareTime: function(time1, time2) {
  if(Date.parse(time1.replace(/-/g, "/")) > Date.parse(time2.replace(/-/g, "/"))) {
   return 1;
  } else if(Date.parse(time1.replace(/-/g, "/")) < Date.parse(time2.replace(/-/g, "/"))) {
   return -1;
  } else if(Date.parse(time1.replace(/-/g, "/")) == Date.parse(time2.replace(/-/g, "/"))) {
   return 0;
  }
 },
 //是否闰年
 isLeapYear: function(year) {
  return((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0);
 },
 //获取某个月的天数,从0开始
 getDaysOfMonth: function(year, month) {
  return [31, (this.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
 },
 getDaysOfMonth2: function(year, month) {
  // 将天置为0,会获取其上个月的最后一天
  month = parseInt(month) + 1;
  var date = new Date(year, month, 0);
  return date.getDate();
 },
 /*距离现在几天的日期:负数表示今天之前的日期,0表示今天,整数表示未来的日期
  * 如-1表示昨天的日期,0表示今天,2表示后天
  */
 fromToday: function(days) {
  var today = new Date();
  today.setDate(today.getDate() + days);
  var date = today.getFullYear() + "-" + (today.getMonth() + 1) + "-" + today.getDate();
  return date;
 },
 /**
  * 日期时间格式化
  * @param {Object} dateTime 需要格式化的日期时间
  * @param {String} pattern 格式化的模式,如yyyy-MM-dd hh(HH):mm:ss.S a k K E D F w W z Z
  */
 formt: function(dateTime, pattern) {
  var date = new Date(dateTime);
  if(Bee.StringUtils.isBlank(pattern)) {
   return date.toLocaleString();
  }
  return pattern.replace(/([a-z])\1*/ig, function(matchStr, group1) {
   var replacement = "";
   switch(group1) {
    case Bee.DateUtils.patterns.PATTERN_ERA: //G
     break;
    case Bee.DateUtils.patterns.PATTERN_WEEK_YEAR: //Y
    case Bee.DateUtils.patterns.PATTERN_YEAR: //y
     replacement = date.getFullYear();
     break;
    case Bee.DateUtils.patterns.PATTERN_MONTH: //M
     var month = date.getMonth() + 1;
     replacement = (month < 10 && matchStr.length >= 2) ? "0" + month : month;
     break;
    case Bee.DateUtils.patterns.PATTERN_DAY_OF_MONTH: //d
     var days = date.getDate();
     replacement = (days < 10 && matchStr.length >= 2) ? "0" + days : days;
     break;
    case Bee.DateUtils.patterns.PATTERN_HOUR_OF_DAY1: //k(1~24)
     var hours24 = date.getHours();
     replacement = hours24;
     break;
    case Bee.DateUtils.patterns.PATTERN_HOUR_OF_DAY0: //H(0~23)
     var hours24 = date.getHours();
     replacement = (hours24 < 10 && matchStr.length >= 2) ? "0" + hours24 : hours24;
     break;
    case Bee.DateUtils.patterns.PATTERN_MINUTE: //m
     var minutes = date.getMinutes();
     replacement = (minutes < 10 && matchStr.length >= 2) ? "0" + minutes : minutes;
     break;
    case Bee.DateUtils.patterns.PATTERN_SECOND: //s
     var seconds = date.getSeconds();
     replacement = (seconds < 10 && matchStr.length >= 2) ? "0" + seconds : seconds;
     break;
    case Bee.DateUtils.patterns.PATTERN_MILLISECOND: //S
     var milliSeconds = date.getMilliseconds();
     replacement = milliSeconds;
     break;
    case Bee.DateUtils.patterns.PATTERN_DAY_OF_WEEK: //E
     var day = date.getDay();
     replacement = Bee.DateUtils.week['ch'][day];
     break;
    case Bee.DateUtils.patterns.PATTERN_DAY_OF_YEAR: //D
     replacement = Bee.DateUtils.dayOfTheYear(date);
     break;
    case Bee.DateUtils.patterns.PATTERN_DAY_OF_WEEK_IN_MONTH: //F
     var days = date.getDate();
     replacement = Math.floor(days / 7);
     break;
    case Bee.DateUtils.patterns.PATTERN_WEEK_OF_YEAR: //w
     var days = Bee.DateUtils.dayOfTheYear(date);
     replacement = Math.ceil(days / 7);
     break;
    case Bee.DateUtils.patterns.PATTERN_WEEK_OF_MONTH: //W
     var days = date.getDate();
     replacement = Math.ceil(days / 7);
     break;
    case Bee.DateUtils.patterns.PATTERN_AM_PM: //a
     var hours24 = date.getHours();
     replacement = hours24 < 12 ? "\u4e0a\u5348" : "\u4e0b\u5348";
     break;
    case Bee.DateUtils.patterns.PATTERN_HOUR1: //h(1~12)
     var hours12 = date.getHours() % 12 || 12; //0转为12
     replacement = (hours12 < 10 && matchStr.length >= 2) ? "0" + hours12 : hours12;
     break;
    case Bee.DateUtils.patterns.PATTERN_HOUR0: //K(0~11)
     var hours12 = date.getHours() % 12;
     replacement = hours12;
     break;
    case Bee.DateUtils.patterns.PATTERN_ZONE_NAME: //z
     replacement = Bee.DateUtils.getZoneNameValue(date)['name'];
     break;
    case Bee.DateUtils.patterns.PATTERN_ZONE_VALUE: //Z
     replacement = Bee.DateUtils.getZoneNameValue(date)['value'];
     break;
    case Bee.DateUtils.patterns.PATTERN_ISO_DAY_OF_WEEK: //u
     break;
    case Bee.DateUtils.patterns.PATTERN_ISO_ZONE: //X
     break;
    default:
     break;
   }
   return replacement;
  });
 },
 /**
  * 计算一个日期是当年的第几天
  * @param {Object} date
  */
 dayOfTheYear: function(date) {
  var obj = new Date(date);
  var year = obj.getFullYear();
  var month = obj.getMonth(); //从0开始
  var days = obj.getDate();
  var daysArr = [31, (this.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
  for(var i = 0; i < month; i++) {
   days += daysArr[i];
  }
  return days;
 },
 //获得时区名和值
 getZoneNameValue: function(dateObj) {
  var date = new Date(dateObj);
  date = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()));
  var arr = date.toString().match(/([A-Z]+)([-+]\d+:?\d+)/);
  var obj = {
   'name': arr[1],
   'value': arr[2]
  };
  return obj;
 }
};
//用法示例
console.log(DateUtils.getCurrentTime())//获取当前时间
console.log(DateUtils.compareTime('2018-8-1','2018-9-3'))//比较时间
console.log(DateUtils.isLeapYear('2018'))//是否闰年
console.log(DateUtils.getDaysOfMonth('2018','9'))//获取指定月份的天数(从0计数)
console.log(DateUtils.dayOfTheYear('2018-9-3'))//计算指定日期是当年第几天

使用在线HTML/CSS/JavaScript代码运行工具:http://tools.aspxhome.com/code/HtmlJsRun测试运行结果如下:

JavaScript日期工具类DateUtils定义与用法示例

希望本文所述对大家JavaScript程序设计有所帮助。

来源:https://blog.csdn.net/LinBilin_/article/details/73505953

0
投稿

猜你喜欢

手机版 网络编程 asp之家 www.aspxhome.com