JS将时间戳转换成日期格式

在ThinkPHP网站上发现此代码，觉得挺实用的，收藏下来。

此js函数类似于PHP的date函数，包括用法也很相像，能够方便的将时间戳转换成日期格式，而且还支持自定义日期的格式。代码如下：

/** * 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 */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;    });}

代码很实用，能够很方便的将时间戳转换成日期的格式，如：

date('Y-m-d','1350052653');//很方便的将时间戳转换成了2012-10-11date('Y-m-d H:i:s','1350052653');//得到的结果是2012-10-12 22:37:33

参考资料：http://www.xiaoboy.com/detail/1341545047.html#106492-hi-1-26478-1c3715c08c30ccc3c70e16a935b88086