JavaScript日期时间与时间戳的转换函数分享

如果只是将当前时间转成时间戳，可以直接使用new Date().getTime()/1000；但如果是将某个具体时间或日期转成Unix时间戳，ie不支持像new Date(“2013-1-1”)  这样带参数的方法，将返回NaN。

对此，我写了以下函数，支持ie6+，谷歌，火狐等浏览器：

function getTime(day){

 re = /(\d{4})(?:-(\d{1,2})(?:-(\d{1,2}))?)?(?:\s+(\d{1,2}):(\d{1,2}):(\d{1,2}))?/.exec(day);

 return new Date(re[1],(re[2]||1)-1,re[3]||1,re[4]||0,re[5]||0,re[6]||0).getTime()/1000;

}
//test

alert(getTime("2013-02-03 10:10:10"));

alert(getTime("2013-02-03"));

alert(getTime("2013-02"));

alert(getTime("2013"));

下面这个将时间戳转换成日期格式的函数，支持自定义的日期格式，效果类似PHP的date函数，同样支持ie6+，谷歌，火狐等浏览器。这个函数是网友实现的，以后有时间我也写一个出来 ^_^

function date(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;

    });

}
//test

alert(date('Y-m-d H:i:s',(new Date).getTime()/1000));

alert(date('Y-m-d',(new Date).getTime()/1000));

alert(date('Y-m-d H:i:s','1355252653'));