node.js日期

废话不多说了，就是一些日期格式以及一些小方法，直接写在Date.prototype里了，new Date()直接就可以用了。

Date.prototype.format = function (format) {
    var o = {
        "M+":this.getMonth() + 1, //month
        "d+":this.getDate(), //day
        "h+":this.getHours(), //hour
        "m+":this.getMinutes(), //minute
        "s+":this.getSeconds(), //second
        "q+":Math.floor((this.getMonth() + 3) / 3), //quarter
        "S":this.getMilliseconds() //millisecond
    }

    if (/(y+)/.test(format)) {
        format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    }

    for (var k in o) {
        if (new RegExp("(" + k + ")").test(format)) {
            format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
        }
    }
    return format;
}
Date.prototype.timestamp = function () {
    return this.getTime();
}
Date.prototype.DateAdd = function (strInterval, Number) {
    var dtTmp = this;
    switch (strInterval) {
        case 's' :
            return new Date(Date.parse(dtTmp) + (1000 * Number));
        case 'n' :
            return new Date(Date.parse(dtTmp) + (60000 * Number));
        case 'h' :
            return new Date(Date.parse(dtTmp) + (3600000 * Number));
        case 'd' :
            return new Date(Date.parse(dtTmp) + (86400000 * Number));
        case 'w' :
            return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
        case 'q' :
            return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
        case 'm' :
            return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
        case 'y' :
            return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
    }
}
Date.prototype.DateDiff = function (strInterval, dtEnd) {
    var dtStart = this;
    if (typeof dtEnd == 'string')//如果是字符串转换为日期型
    {
        dtEnd = StringToDate(dtEnd);
    }
    switch (strInterval) {
        case 's' :
            return parseInt((dtEnd - dtStart) / 1000);
        case 'n' :
            return parseInt((dtEnd - dtStart) / 60000);
        case 'h' :
            return parseInt((dtEnd - dtStart) / 3600000);
        case 'd' :
            return parseInt((dtEnd - dtStart) / 86400000);
        case 'w' :
            return parseInt((dtEnd - dtStart) / (86400000 * 7));
        case 'm' :
            return (dtEnd.getMonth() + 1) + ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12) - (dtStart.getMonth() + 1);
        case 'y' :
            return dtEnd.getFullYear() - dtStart.getFullYear();
    }
}
Date.prototype.DatePart = function (interval) {
    var myDate = this;
    var partStr = '';
    var Week = ['日', '一', '二', '三', '四', '五', '六'];
    switch (interval) {
        case 'y' :
            partStr = myDate.getFullYear();
            break;
        case 'm' :
            partStr = myDate.getMonth() + 1;
            break;
        case 'd' :
            partStr = myDate.getDate();
            break;
        case 'w' :
            partStr = Week[myDate.getDay()];
            break;
        case 'ww' :
            partStr = myDate.WeekNumOfYear();
            break;
        case 'h' :
            partStr = myDate.getHours();
            break;
        case 'n' :
            partStr = myDate.getMinutes();
            break;
        case 's' :
            partStr = myDate.getSeconds();
            break;
    }
    return partStr;
}
Date.prototype.WeekNumOfYear = function () {
    var myDate = this;
    var ary = myDate.toArray();
    var year = ary[0];
    var month = ary[1] + 1;
    var day = ary[2];
    document.write('< script language=VBScript> 
');
    document.write('myDate = DateValue("' + month + '-' + day + '-' + year + '") 
');
    document.write("result = DatePart('ww', myDate) 
");
    document.write(' 
');
    return result;
}
Date.prototype.isLeapYear = function () {
    return (0 == this.getYear() % 4 && ((this.getYear() % 100 != 0) || (this.getYear() % 400 == 0)));
}
Date.prototype.MaxDayOfDate = function () {
    var myDate = this;
    var month = myDate.getMonth() + 1;
    switch (month) {
        case 1:
        case 3:
        case 5:
        case 7:
        case 8 :
        case 10:
        case 12:
            return 31;

        case 4:
        case 6 :
        case 9 :
        case 11:
            return 30;

        case 2:
            return   myDate.isLeapYear() ? 28 : 29;
    }

}

function StringToDate(DateStr) {

    var converted = Date.parse(DateStr);
    var myDate = new Date(converted);
    if (isNaN(myDate)) {
        //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';
        var arys = DateStr.split('-');
        myDate = new Date(arys[0], --arys[1], arys[2]);
    }
    return myDate;
}