js日期函数
获取计算特殊的日期格式对象：
获取当前日期： 兼容性
new Date();//Mon Nov 05 2018 01:11:35 GMT+0800 (中国标准时间)
var newDay=new Date(1541351729432);//Mon Nov 05 2018 01:15:29 GMT+0800 (中国标准时间) 时间戳换特殊格式 var newDay=new Date('1990','06','06','12','15','15');//Fri Jul 06 1990 12:15:15 GMT+0900 (中国夏令时间) var newDay=new Date('2018-11-05 12:25:45');//Mon Nov 05 2018 12:25:45 GMT+0800 (中国标准时间)//这个有许多浏览器不兼容 // 主要对默认的日期格式进行转换， 基于'/'格式的日期字符串，才是被各个浏览器所广泛支持的，‘-’连接的日期字符串，则是只在chrome下可以正常工作 var timeStr= "2017-11-09 23:23:23" var time= new Date(timeStr.replace(/-/g,"/"));
特殊日期对象转时间戳：
var newDay=new Date();//Mon Nov 05 2018 01:15:29 GMT+0800 (中国标准时间) var b= Number(newDay)//1541351729432 到毫秒 var b=newDay.valueOf();//1541351729432 到毫秒 var b=newDay.getTime();//1541351729432 到毫秒 var b=newDay.getTime();//1541351729432 到毫秒 var b=Date.parse(newDay)//1541351729000 到秒 除以1000就得到1541351729 标准的以秒为单位时间戳
格式化日期转时间戳：
Date.parse('2018-11-29 01:47:24');//1543427244 (除了谷歌浏览器都得不到结果）
// 主要对默认的日期格式进行转换， 基于'/'格式的日期字符串，才是被各个浏览器所广泛支持的，‘-’连接的日期字符串，则是只在chrome下可以正常工作
var timeStr= "2017-11-09 23:23:23"
var time= new Date(Date.parse(timeStr.replace(/-/g,"/"))).getTime();
①时间戳转格式化日期：
/** * 和PHP一样的时间戳格式化函数 * @param {string} format 格式 * @param {int} timestamp 要格式化的时间 默认为当前时间 * @return {string} 格式化的时间字符串 * eg: * formatDate('Y-m-d','1350052653');//很方便的将时间戳转换成了2012-10-11 * formatDate('Y-m-d H:i:s','1350052653');//得到的结果是2012-10-12 22:37:33 */ function formatDate(format, timestamp){ var a, jsdate=((timestamp) ? new Date(timestamp*1000) : new Date()); var pad = function(n, c){ if((n = n + "").length < c){ return new Array(++c - n.length).join("0") + n; } else { return n; } }; var txt_weekdays = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]; var txt_ordin = {1:"st", 2:"nd", 3:"rd", 21:"st", 22:"nd", 23:"rd", 31:"st"}; var txt_months = ["", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]; var f = { // Day d: function(){return pad(f.j(), 2)}, D: function(){return f.l().substr(0,3)}, j: function(){return jsdate.getDate()}, l: function(){return txt_weekdays[f.w()]}, N: function(){return f.w() + 1}, S: function(){return txt_ordin[f.j()] ? txt_ordin[f.j()] : 'th'}, w: function(){return jsdate.getDay()}, z: function(){return (jsdate - new Date(jsdate.getFullYear() + "/1/1")) / 864e5 >> 0}, // Week W: function(){ var a = f.z(), b = 364 + f.L() - a; var nd2, nd = (new Date(jsdate.getFullYear() + "/1/1").getDay() || 7) - 1; if(b <= 2 && ((jsdate.getDay() || 7) - 1) <= 2 - b){ return 1; } else{ if(a <= 2 && nd >= 4 && a >= (6 - nd)){ nd2 = new Date(jsdate.getFullYear() - 1 + "/12/31"); return date("W", Math.round(nd2.getTime()/1000)); } else{ return (1 + (nd <= 3 ? ((a + nd) / 7) : (a - (7 - nd)) / 7) >> 0); } } }, // Month F: function(){return txt_months[f.n()]}, m: function(){return pad(f.n(), 2)}, M: function(){return f.F().substr(0,3)}, n: function(){return jsdate.getMonth() + 1}, t: function(){ var n; if( (n = jsdate.getMonth() + 1) == 2 ){ return 28 + f.L(); } else{ if( n & 1 && n < 8 || !(n & 1) && n > 7 ){ return 31; } else{ return 30; } } }, // Year L: function(){var y = f.Y();return (!(y & 3) && (y % 1e2 || !(y % 4e2))) ? 1 : 0}, //o not supported yet Y: function(){return jsdate.getFullYear()}, y: function(){return (jsdate.getFullYear() + "").slice(2)}, // Time a: function(){return jsdate.getHours() > 11 ? "pm" : "am"}, A: function(){return f.a().toUpperCase()}, B: function(){ // peter paul koch: var off = (jsdate.getTimezoneOffset() + 60)*60; var theSeconds = (jsdate.getHours() * 3600) + (jsdate.getMinutes() * 60) + jsdate.getSeconds() + off; var beat = Math.floor(theSeconds/86.4); if (beat > 1000) beat -= 1000; if (beat < 0) beat += 1000; if ((String(beat)).length == 1) beat = "00"+beat; if ((String(beat)).length == 2) beat = "0"+beat; return beat; }, g: function(){return jsdate.getHours() % 12 || 12}, G: function(){return jsdate.getHours()}, h: function(){return pad(f.g(), 2)}, H: function(){return pad(jsdate.getHours(), 2)}, i: function(){return pad(jsdate.getMinutes(), 2)}, s: function(){return pad(jsdate.getSeconds(), 2)}, //u not supported yet // Timezone //e not supported yet //I not supported yet O: function(){ var t = pad(Math.abs(jsdate.getTimezoneOffset()/60*100), 4); if (jsdate.getTimezoneOffset() > 0) t = "-" + t; else t = "+" + t; return t; }, P: function(){var O = f.O();return (O.substr(0, 3) + ":" + O.substr(3, 2))}, //T not supported yet //Z not supported yet // Full Date/Time c: function(){return f.Y() + "-" + f.m() + "-" + f.d() + "T" + f.h() + ":" + f.i() + ":" + f.s() + f.P()}, //r not supported yet U: function(){return Math.round(jsdate.getTime()/1000)} }; return format.replace(/[\\]?([a-zA-Z])/g, function(t, s){ if( t!=s ){ // escaped ret = s; } else if( f[s] ){ // a date function exists ret = f[s](); } else{ // nothing special ret = s; } return ret; }); }
②数组转格式化时间
;function timeArrayToFormatTime(data,seconds){ seconds=seconds|0; var stime= new Date(data.year,data.month-1,data.date,data.hours,data.minutes,data.seconds); stime=Date.parse(stime)/1000; stime=formatDate('Y-m-d H:i:s',stime+seconds) return stime; }
时间对象转时间数组
;function nowTimeObjToArray(timeObj){ timeObj=timeObj||new Date(); var startYear=timeObj.getFullYear(); var startMonth=timeObj.getMonth()+1; var startDay=timeObj.getDate(); var startHours=timeObj.getHours(); var startMinutes=timeObj.getMinutes(); var startSeconds=timeObj.getSeconds(); var timeArr= { year: startYear, month: startMonth, date: startDay, hours: startHours, minutes: startMinutes, seconds:startSeconds }; return timeArr; }
时间对象转格式化时间 （2018-11-08 17:03:13 ） 时间戳转格式化日期
//时间对象转格式化时间，或者时间戳转格式化时间(10位的标准时间戳和13位毫秒时间戳) ;function nowTimeObjToFormatTime(timeObj){ timeObj=timeObj||''; var preg=/(^[0-9][0-9]{9}$)|(^[0-9][0-9]{12}$)/; if(typeof timeObj=='object'&&timeObj instanceof Date){ timeObj=timeObj; }else if(preg.test(timeObj.toString().replace(/(^\s*)|(\s*$)/g,""))){ alert(111) var newStr=timeObj.toString().replace(/(^\s*)|(\s*$)/g,""); if(newStr.length==10){ newStr=newStr+'000'; } timeObj=Number(newStr); timeObj=new Date(timeObj); }else{ timeObj=new Date(); } var startYear=timeObj.getFullYear(); var startMonth=timeObj.getMonth()+1; var startDay=timeObj.getDate(); var startHours=timeObj.getHours(); var startMinutes=timeObj.getMinutes(); var startSeconds=timeObj.getSeconds(); if(startMonth<10){ startMonth='0'+startMonth;//0-11 } if(startDay<10){ startDay='0'+startDay;//1-31 } if(startHours==0||startHours<10){ startHours='0'+startHours;//0-23 } if(startMinutes==0||startMinutes<10){ startMinutes='0'+startMinutes;//0-59 } if(startSeconds==0||startSeconds<10){ startSeconds='0'+startSeconds;//0-59 } var formatTime=startYear+'-'+startMonth+'-'+startDay+' '+startHours+':'+startMinutes+':'+startSeconds; return formatTime; }
数组转格式化时间
