js 格式化日期

方法一：把时间字符串转成日期对象



var d = eval('new Date(' + nameValue.replace(/\d+(?=-[^-]+$)/,

function (a) { return parseInt(a, 10) - 1; }).match(/\d+/g) + ')');



d.Format("YYYY-MM-dd");

d.Format("hh:mm:ss");

d.Format("yyyy-MM-dd hh:mm:ss");



方法二：



function DateUtil() { }
/** *功能:格式化时间 *示例:DateUtil.Format("yyyy/MM/dd","Thu Nov 9 20:30:37 UTC+0800 2006 "); *返回:2006/11/09 */
DateUtil.Format = function(fmtCode, date) {
var result, d, arr_d;
var patrn_now_1 = /^y{4}-M{2}-d{2}\sh{2}:m{2}:s{2}$/;
var patrn_now_11 = /^y{4}-M{1,2}-d{1,2}\sh{1,2}:m{1,2}:s{1,2}$/;
var patrn_now_2 = /^y{4}\/M{2}\/d{2}\sh{2}:m{2}:s{2}$/;
var patrn_now_22 = /^y{4}\/M{1,2}\/d{1,2}\sh{1,2}:m{1,2}:s{1,2}$/;
var patrn_now_3 = /^y{4}年M{2}月d{2}日\sh{2}时m{2}分s{2}秒$/;
var patrn_now_33 = /^y{4}年M{1,2}月d{1,2}日\sh{1,2}时m{1,2}分s{1,2}秒$/;
var patrn_date_1 = /^y{4}-M{2}-d{2}$/;
var patrn_date_11 = /^y{4}-M{1,2}-d{1,2}$/;
var patrn_date_2 = /^y{4}\/M{2}\/d{2}$/;
var patrn_date_22 = /^y{4}\/M{1,2}\/d{1,2}$/;
var patrn_date_3 = /^y{4}年M{2}月d{2}日$/;
var patrn_date_33 = /^y{4}年M{1,2}月d{1,2}日$/;
var patrn_time_1 = /^h{2}:m{2}:s{2}$/;
var patrn_time_11 = /^h{1,2}:m{1,2}:s{1,2}$/;
var patrn_time_2 = /^h{2}时m{2}分s{2}秒$/;
var patrn_time_22 = /^h{1,2}时m{1,2}分s{1,2}秒$/;
if (!fmtCode) {
fmtCode = "yyyy/MM/dd hh:mm:ss";
}
if (date) {
d = new Date(date);
if (isNaN(d)) {
msgBox("时间参数非法\n正确的时间示例:\nThu Nov 9 20:30:37 UTC+0800 2006\n或\n2006/ 10/17");
return;
}
} else {
d = new Date();
}
if (patrn_now_1.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.yyyy + "-" + arr_d.MM + "-" + arr_d.dd + " " + arr_d.hh + ":" + arr_d.mm + ":" + arr_d.ss;
} else if (patrn_now_11.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.yyyy + "-" + arr_d.MM + "-" + arr_d.dd + " " + arr_d.hh + ":" + arr_d.mm + ":" + arr_d.ss;
} else if (patrn_now_2.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.yyyy + "/" + arr_d.MM + "/" + arr_d.dd + " " + arr_d.hh + ":" + arr_d.mm + ":" + arr_d.ss;
} else if (patrn_now_22.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.yyyy + "/" + arr_d.MM + "/" + arr_d.dd + " " + arr_d.hh + ":" + arr_d.mm + ":" + arr_d.ss;
} else if (patrn_now_3.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.yyyy + "年" + arr_d.MM + "月" + arr_d.dd + "日" + " " + arr_d.hh + "时" + arr_d.mm + "分" + arr_d.ss + "秒";
} else if (patrn_now_33.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.yyyy + "年" + arr_d.MM + "月" + arr_d.dd + "日" + " " + arr_d.hh + "时" + arr_d.mm + "分" + arr_d.ss + "秒";
} else if (patrn_date_1.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.yyyy + "-" + arr_d.MM + "-" + arr_d.dd;
} else if (patrn_date_11.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.yyyy + "-" + arr_d.MM + "-" + arr_d.dd;
} else if (patrn_date_2.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.yyyy + "/" + arr_d.MM + "/" + arr_d.dd;
} else if (patrn_date_22.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.yyyy + "/" + arr_d.MM + "/" + arr_d.dd;
} else if (patrn_date_3.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.yyyy + "年" + arr_d.MM + "月" + arr_d.dd + "日";
} else if (patrn_date_33.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.yyyy + "年" + arr_d.MM + "月" + arr_d.dd + "日";
} else if (patrn_time_1.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.hh + ":" + arr_d.mm + ":" + arr_d.ss;
} else if (patrn_time_11.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.hh + ":" + arr_d.mm + ":" + arr_d.ss;
} else if (patrn_time_2.test(fmtCode)) {
arr_d = splitDate(d, true);
result = arr_d.hh + "时" + arr_d.mm + "分" + arr_d.ss + "秒";
} else if (patrn_time_22.test(fmtCode)) {
arr_d = splitDate(d);
result = arr_d.hh + "时" + arr_d.mm + "分" + arr_d.ss + "秒";
} else {
msgBox("没有匹配的时间格式!");
return;
}
return result;
};

function splitDate(d, isZero) {
var yyyy, MM, dd, hh, mm, ss;
if (isZero) {
yyyy = d.getYear();
MM = (d.getMonth() + 1) < 10 ? "0" + (d.getMonth() + 1) : d.getMonth() + 1;
dd = d.getDate() < 10 ? "0" + d.getDate() : d.getDate();
hh = d.getHours() < 10 ? "0" + d.getHours() : d.getHours();
mm = d.getMinutes() < 10 ? "0" + d.getMinutes() : d.getMinutes();
ss = d.getSeconds() < 10 ? "0" + d.getSeconds() : d.getSeconds();
} else {
yyyy = d.getYear();
MM = d.getMonth() + 1;
dd = d.getDate();
hh = d.getHours();
mm = d.getMinutes();
ss = d.getSeconds();
}
return {
"yyyy": yyyy,
"MM": MM,
"dd": dd,
"hh": hh,
"mm": mm,
"ss": ss
};
}
function msgBox(msg) {
window.alert(msg);
}