上篇文章我们为大家介绍了javascript字符串工具类stringutils详解，本文主要为大家详细介绍了javascript日期工具类dateutils，具有一定的参考价值，感兴趣的小伙伴们可以参考一下，希望能帮助到大家。
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;
}
};
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以上就是javascript日期工具类dateutils详解的详细内容。