js处理日期格式化-年月日周

    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)); 
        } 
        var week = {         
            "0" : "一",         
            "1" : "二",         
            "2" : "三",         
            "3" : "四",         
            "4" : "五",         
            "5" : "六",         
            "6" : "日"        
            };  
        if(/(E+)/.test(format)){         
            format=format.replace(RegExp.$1, ((RegExp.$1.length>1) ? (RegExp.$1.length>2 ? "星期" : "周") : "")+week[this.getDay()+""]);         
        }    
        
        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; 
        } 

 new Date(time).format("yyyy年MM月dd日 EEE");

// 对Date的扩展，将 Date 转化为指定格式的String
// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符， 
// 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) 
// 例子： 
// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423 
// (new Date()).Format("yyyy-M-d h:m:s.S")      ==> 2006-7-2 8:9:4.18 
Date.prototype.Format = function (fmt) { //author: meizz 
    var o = {
        "M+": this.getMonth() + 1, //月份 
        "d+": this.getDate(), //日 
        "h+": this.getHours(), //小时 
        "m+": this.getMinutes(), //分 
        "s+": this.getSeconds(), //秒 
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
        "S": this.getMilliseconds() //毫秒 
    };
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o)
    if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
}调用： var time1 = new Date().Format("yyyy-MM-dd");var time2 = new Date().Format("yyyy-MM-dd HH:mm:ss");

<script language="javascript" type="text/javascript"> 
<!-- /** * 对Date的扩展，将 Date 转化为指定格式的String * 月(M)、日(d)、12小时(h)、24小时(H)、分(m)、秒(s)、周(E)、季度(q)
    可以用 1-2 个占位符 * 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) * eg: * (new
    Date()).pattern("yyyy-MM-dd hh:mm:ss.S")==> 2006-07-02 08:09:04.423      
 * (new Date()).pattern("yyyy-MM-dd E HH:mm:ss") ==> 2009-03-10 二 20:09:04      
 * (new Date()).pattern("yyyy-MM-dd EE hh:mm:ss") ==> 2009-03-10 周二 08:09:04      
 * (new Date()).pattern("yyyy-MM-dd EEE hh:mm:ss") ==> 2009-03-10 星期二 08:09:04      
 * (new Date()).pattern("yyyy-M-d h:m:s.S") ==> 2006-7-2 8:9:4.18      
 */        
Date.prototype.pattern=function(fmt) {         
    var o = {         
    "M+" : this.getMonth()+1, //月份         
    "d+" : this.getDate(), //日         
    "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, //小时         
    "H+" : this.getHours(), //小时         
    "m+" : this.getMinutes(), //分         
    "s+" : this.getSeconds(), //秒         
    "q+" : Math.floor((this.getMonth()+3)/3), //季度         
    "S" : this.getMilliseconds() //毫秒         
    };         
    var week = {         
    "0" : "/u65e5",         
    "1" : "/u4e00",         
    "2" : "/u4e8c",         
    "3" : "/u4e09",         
    "4" : "/u56db",         
    "5" : "/u4e94",         
    "6" : "/u516d"        
    };         
    if(/(y+)/.test(fmt)){         
        fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));         
    }         
    if(/(E+)/.test(fmt)){         
        fmt=fmt.replace(RegExp.$1, ((RegExp.$1.length>1) ? (RegExp.$1.length>2 ? "/u661f/u671f" : "/u5468") : "")+week[this.getDay()+""]);         
    }         
    for(var k in o){         
        if(new RegExp("("+ k +")").test(fmt)){         
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));         
        }         
    }         
    return fmt;         
}       
     
var date = new Date();      
window.alert(date.pattern("yyyy-MM-dd hh:mm:ss"));
// -->
</script>

Date.prototype.format = function (mask) { 
    var d = this;

    var zeroize = function (value, length) {

            if (!length) length = 2;

            value = String(value);

            for (var i = 0, zeros = ‘‘; i < (length - value.length); i++) {

                zeros += ‘0‘;

            }

            return zeros + value;

        };

    return mask.replace(/"[^"]*"|‘[^‘]*‘|/b ( ? : d {
        1, 4
    } | m {
        1, 4
    } | yy( ? : yy) ? | ([hHMstT]) / 1 ? | [lLZ]) / b / g, function ($0) {

        switch ($0) {

        case ‘d‘:
            return d.getDate();

        case ‘dd‘:
            return zeroize(d.getDate());

        case ‘ddd‘:
            return [‘Sun‘, ‘Mon‘, ‘Tue‘, ‘Wed‘, ‘Thr‘, ‘Fri‘, ‘Sat‘][d.getDay()];

        case ‘dddd‘:
            return [‘Sunday‘, ‘Monday‘, ‘Tuesday‘, ‘Wednesday‘, ‘Thursday‘, ‘Friday‘, ‘Saturday‘][d.getDay()];

        case ‘M‘:
            return d.getMonth() + 1;

        case ‘MM‘:
            return zeroize(d.getMonth() + 1);

        case ‘MMM‘:
            return [‘Jan‘, ‘Feb‘, ‘Mar‘, ‘Apr‘, ‘May‘, ‘Jun‘, ‘Jul‘, ‘Aug‘, ‘Sep‘, ‘Oct‘, ‘Nov‘, ‘Dec‘][d.getMonth()];

        case ‘MMMM‘:
            return [‘January‘, ‘February‘, ‘March‘, ‘April‘, ‘May‘, ‘June‘, ‘July‘, ‘August‘, ‘September‘, ‘October‘, ‘November‘, ‘December‘][d.getMonth()];

        case ‘yy‘:
            return String(d.getFullYear()).substr(2);

        case ‘yyyy‘:
            return d.getFullYear();

        case ‘h‘:
            return d.getHours() % 12 || 12;

        case ‘hh‘:
            return zeroize(d.getHours() % 12 || 12);

        case ‘H‘:
            return d.getHours();

        case ‘HH‘:
            return zeroize(d.getHours());

        case ‘m‘:
            return d.getMinutes();

        case ‘mm‘:
            return zeroize(d.getMinutes());

        case ‘s‘:
            return d.getSeconds();

        case ‘ss‘:
            return zeroize(d.getSeconds());

        case ‘l‘:
            return zeroize(d.getMilliseconds(), 3);

        case ‘L‘:
            var m = d.getMilliseconds();

            if (m > 99) m = Math.round(m / 10);

            return zeroize(m);

        case ‘tt‘:
            return d.getHours() < 12 ? ‘am‘ : ‘pm‘;

        case ‘TT‘:
            return d.getHours() < 12 ? ‘AM‘ : ‘PM‘;

        case ‘Z‘:
            return d.toUTCString().match(/[A-Z]+$/);

            // Return quoted strings with the surrounding quotes removed      

        default:
            return $0.substr(1, $0.length - 2);

        }

    });

};