1.計(jì)算純?nèi)掌?（條件：已知相對于1900-01-01過去的天數(shù)）

var startTime = this._getOriginalTimeMs();
var currentValue = parseInt(value) + 1 ;
var lastTime = startTime + currentValue * 24 * 60 * 60 * 1000;
var showTime = new Date(lastTime);

_getOriginalTimeMs () {
    var originalTime = new Date(1900, 0, 1, 0, 0, 0);
    return originalTime.getTime();//得到毫秒數(shù)
}

2.計(jì)算純時(shí)間 （條件：已知相對于00:00過去的秒數(shù)）

//實(shí)現(xiàn)的邏輯就是拿到當(dāng)天的0點(diǎn)0分0秒的時(shí)間zeroTime，
//然后拿要計(jì)算的秒數(shù)value變成毫秒之后加上zeroTime變成的毫秒進(jìn)行計(jì)算
var zeroTime = new Date(currentDate.getFullYear(),currentDate.getMonth(),currentDate.getDate() , '00','00','00');
var time = new Date(zeroTime.getTime() + parseInt(value) * 1000);
var time1 = this._addZero(time.getHours()) + ":" + this._addZero(time.getMinutes());

 //給日期加"0"
_addZero(obj) { 
    if (parseInt(obj) < 10) {
       return "0" + '' + obj;
    } else {
        return obj;
    }
},

比如：value：32580
得出的結(jié)果： time：Mon Sep 25 2017 09:03:00 GMT+0800 (CST)

3.將GMT+0800 (CST)格式的時(shí)間轉(zhuǎn)化為標(biāo)準(zhǔn)的XML Schema的"日期型數(shù)據(jù)格式”

//要轉(zhuǎn)化的時(shí)間是timeValue
var currentDate = timeValue.toJSON();

比如Thu Sep 21 2017 09:32:00 GMT+0800 (CST)
轉(zhuǎn)化為'2017-09-21T01:32:00.000Z'

4.計(jì)算幾年的時(shí)間(包括每個(gè)月應(yīng)該是幾天)

_createDateData() {
        let date = [];
        let datetime = new Date();
        let currentYear = parseInt(datetime.getFullYear());
        for (let i = currentYear; i < currentYear + 10 ; i++) {
            let month = [];
            for (let j = 1; j < 13; j++) {
                let day = [];
                if (j === 2) {
                    for (let k = 1; k < 29; k++) {
                        day.push(k);
                    }
                    //Leap day for years that are divisible by 4, such as 2000, 2004
                    if (i % 4 === 0) {
                        day.push(29);
                    }
                }
                else if (j in {1: 1, 3: 1, 5: 1, 7: 1, 8: 1, 10: 1, 12: 1}) {
                    for (let k = 1; k < 32; k++) {
                        day.push(k);
                    }
                }
                else {
                    for (let k = 1; k < 31; k++) {
                        day.push(k);
                    }
                }
                let _month = {};
                var s = Months[j - 1];
                _month[s] = day;
                month.push(_month);
            }
            let _date = {};
            _date[i] = month;
            date.push(_date);
        }
        return date;
    }

如果有不對的地方請多指教。