时间js

function DateUtil(){
this.url = "";
this.op={
partten:{mdy:"m/d/y",ymd:"y/m/d",dmy:"d/m/y"}
};
this.cdate = new Date();
} 

DateUtil.prototype.updateDate=function(){
this.cdate = new Date();
}; 

DateUtil.prototype.setTime=function(v){
this.cdate.setTime(v);
}; 

DateUtil.prototype.getYear=function(){
return this.cdate.getFullYear();
};
DateUtil.prototype.getMonth=function(){
return this.cdate.getMonth()+1;
}; 

DateUtil.prototype.getDay=function(){
return this.cdate.getDate();
}; 

DateUtil.prototype.getFirstDayOfMonth=function(d){
var currentMonth = new Date(d.getTime())||new Date();
currentMonth.setDate(1);
return currentMonth;
}; 

DateUtil.prototype.getLastDayOfMonth=function(d){
var nextMonth = new Date(d.getTime())||new Date();
var month = nextMonth.getMonth();
nextMonth.setMonth(month+1);
nextMonth.setDate(0);
return nextMonth;
}; 

//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
DateUtil.prototype.format = function (d,fmt) { //author: meizz
var o = {
"M+": d.getMonth() + 1, //月份
"d+": d.getDate(), //日
"h+": d.getHours(), //小时
"m+": d.getMinutes(), //分
"s+": d.getSeconds(), //秒
"q+": Math.floor((d.getMonth() + 3) / 3), //季度
"S": d.getMilliseconds() //毫秒
};
if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (d.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;
}; 

DateUtil.prototype.getHours=function(){
return this.cdate.getHours();
};
DateUtil.prototype.getMinutes=function(){
return this.cdate.getMinutes();
};
DateUtil.prototype.getSeconds=function(){
return this.cdate.getSeconds();
}; 

DateUtil.prototype.getToday=function(){
return this.format(this.cdate, "yyyy-MM-dd");
};
/**
* 计算出相差的时间后的日期
* @param d 日期
* @param s 相差的时间
* @param t 类型：day天, month月, year年, hour, minute, second
*/
DateUtil.prototype.getNewDate=function(d, s, t){
if("year" == t){
var year = d.getFullYear() + s;
var strDate = year+"/"+this.format(d, "MM/dd hh:mm:ss");
return new Date(strDate);
}else if("month" == t){
var year = d.getFullYear();
var month = d.getMonth()+1 + s;
var strDate="";
if (month==0) {
strDate = (year-1)+"/"+12+"/"+this.format(d, "dd hh:mm:ss");
}else if (month>12) {
strDate = (year+1)+"/"+1+"/"+this.format(d, "dd hh:mm:ss");
}else {
strDate = year+"/"+month+"/"+this.format(d, "dd hh:mm:ss");
}
return new Date(strDate);
}else if("day" == t){
var lt = d.getTime() + s*24*60*60*1000;
return new Date(lt);
}else if("hour" == t){
var lt = d.getTime() + s*60*60*1000;
return new Date(lt);
}else if("minute" == t){
var lt = d.getTime() + s*60*1000;
return new Date(lt);
}else if("second" == t){
var lt = d.getTime() + s*1000;
return new Date(lt);
}
return d;
}; 

DateUtil.prototype.parseDate=function(s){
if(s != null && s != ""){
try{
if(typeof(s) == "string"){
s = s.replace(/-/g, "/");
return new Date(s);
}else if(typeof(s) == "number"){
return new Date(s);
}
}catch(e){
alert(e.message);
}
}
return null;
}; 

DateUtil.prototype.getCurrentTimeString=function(){
return this.getYear()+""+this.getMonth()+""+
this.getDay()+""+this.getHours()+""+
this.getMinutes()+""+this.getSeconds();
}; 

DateUtil.prototype.getWeek=function(date){
var week = 0;
var df = "mmddyy";
if(date==null || date =="" || typeof(date) == "undefined"){
date = this.getToday();
df = "yyMMdd";
}
date = date.replace(/\//g,"-");
week = $.ajax({
type:"get",
url:basePath+"/dateUtil/week/"+encodeURIComponent(date)+"/"+df,
cache:false,
async:false,
dataType:"text"
}).responseText;
return week;
}; 

DateUtil.prototype.getQuarter=function(date, format){
var month = 0;
if(date && typeof(date) == "string" && date != "" && format && format != ""){
var p = this.op.partten[format];
var index = p.indexOf("m");
var d = date.split("/");
if(index == 0){
month = parseInt(d[0],10);
}else{
month = parseInt(d[1],10);
}
}else if(date && typeof(date) == "object"){
month = date.getMonth();
}else if(date && typeof(date) == "number"){
month = date;
}else{
month = this.getMonth();
}
if(month % 3 == 0){
return month / 3;
}else{
return parseInt(month / 3 + 1);
}
}; 

DateUtil.prototype.getQuarterByMonth = function(m){
if(m % 3 == 0){
return m / 3;
}else{
return parseInt(m / 3 + 1);
}
};
/**
* 若date为空，则返回当前日期是周几，否则数据类型为string，格式都为m/d/y
* @param date
* @returns
*/
DateUtil.prototype.getDayOfWeek=function(date){
if(date && typeof(date) == "string"){
var d = date.split("/");
var md = new Date(parseInt(d[2]), parseInt(d[0]), parseInt(d[1]));
return md.getDay();
}else{
this.updateDate();
return this.getDay();
}
};
/**
* 得到一个日期所在周的开始时间和结束时间，不传参数为当前周
* @param date
* @returns {___anonymous5423_5464}
*/
DateUtil.prototype.getStartAndEndDayOf=function(date, type){
var today = date||new Date();
var startDate = "", endDate = "";
if(type == "day"){
startDate = this.format(today, "yyyy-MM-dd");
return {"startDate":startDate, "endDate":startDate};
}else if(type == "week"){
var dayOfweek = today.getDay();
var monday = new Date(today.getFullYear(), today.getMonth(), today.getDate()-dayOfweek+1);
var sunday = new Date(today.getFullYear(), monday.getMonth(), monday.getDate()+6);
startDate = this.format(monday, "yyyy-MM-dd");
endDate = this.format(sunday, "yyyy-MM-dd");
return {"startDate":startDate, "endDate":endDate};
}else if(type == "month"){
var monday = this.getFirstDayOfMonth(today);
var sunday = this.getLastDayOfMonth(today);
startDate = this.format(monday, "yyyy-MM-dd");
endDate = this.format(sunday, "yyyy-MM-dd");
return {"startDate":startDate, "endDate":endDate};
}else if(type == "quarter"){
var quarter = this.getQuarter(today, "");
startDate = this.format(new Date(today.getFullYear(), quarter*3-3, 1), "yyyy-MM-dd");
endDate = this.format(new Date(today.getFullYear(), quarter*3, 0), "yyyy-MM-dd");
return {"startDate":startDate, "endDate":endDate};
}else if(type == "year"){
startDate = today.getFullYear()+"-01-01";
endDate = today.getFullYear()+"-12-31";
return {"startDate":startDate, "endDate":endDate};
}else{
startDate = this.format(today, "yyyy-MM-dd");
return {"startDate":startDate, "endDate":startDate};
}
}; 

DateUtil.prototype.getPreDateForGapTime = function(date, type){
var today = this.parseDate(date)||new Date();
if(type.indexOf("pre") == 0){
type = type.replace("pre","");
var endDate = this.format(today, "yyyy-MM-dd");
if(type.toLowerCase() == "day"){
return {"startDate":endDate, "endDate":endDate};
}else if(type.toLowerCase() == "week"){
var startDate = this.format(this.getNewDate(today, -7, "day"), "yyyy-MM-dd");
return {"startDate":startDate, "endDate":endDate};
}else if(type.toLowerCase() == "month"){
var startDate = this.format(this.getNewDate(today, -1, "month"), "yyyy-MM-dd");
return {"startDate":startDate, "endDate":endDate};
}else if(type.toLowerCase() == "quarter"){
var startDate = this.format(this.getNewDate(today, -90, "day"), "yyyy-MM-dd");
return {"startDate":startDate, "endDate":endDate};
}else if(type.toLowerCase() == "year"){
var startDate = this.format(this.getNewDate(today, -1, "year"), "yyyy-MM-dd");
return {"startDate":startDate, "endDate":endDate};
}else{
return {"startDate":endDate, "endDate":endDate};
}
}else{
return this.getStartAndEndDayOf(date, type);
}
}; 

DateUtil.prototype.newgetPreDateForGapTime = function(date, type,i){
var today = this.parseDate(date)||new Date();
if(type.indexOf("pre") == 0){
type = type.replace("pre","");
if(type.toLowerCase() == "day" || type.toLowerCase() == "hour" || type.toLowerCase() == "minute"){
var startDate = this.format(this.getNewDate(today, 1*i, "day"), "yyyy-MM-dd");
var time=this.getStartAndEndDayOf(new Date(startDate), type.toLowerCase());
return {"startDate":time.startDate, "endDate":time.endDate};
}else if(type.toLowerCase() == "week"){
var startDate = this.format(this.getNewDate(today, 7*i, "day"), "yyyy-MM-dd");
var time=this.getStartAndEndDayOf(new Date(startDate), type.toLowerCase());
return {"startDate":time.startDate, "endDate":time.endDate};
}else if(type.toLowerCase() == "month"){
var startDate = this.format(this.getNewDate(today, 1*i, "month"), "yyyy-MM-dd");
var time=this.getStartAndEndDayOf(new Date(startDate), type.toLowerCase());
return {"startDate":time.startDate, "endDate":time.endDate};
}else if(type.toLowerCase() == "quarter"){
var startDate = this.format(this.getNewDate(today, 90*i, "day"), "yyyy-MM-dd");
var time=this.getStartAndEndDayOf(new Date(startDate), type.toLowerCase());
return {"startDate":time.startDate, "endDate":time.endDate};
}else if(type.toLowerCase() == "year"){
var startDate = this.format(this.getNewDate(today, 1*i, "year"), "yyyy-MM-dd");
var time=this.getStartAndEndDayOf(new Date(startDate), type.toLowerCase());
return {"startDate":time.startDate, "endDate":time.endDate};
}else{
return {"startDate":endDate, "endDate":endDate};
}
}else{
return this.getStartAndEndDayOf(date, type);
}
};
function isLeapYear(year) {
    return (year % 400 == 0) || (year % 4 == 0 && year % 100 != 0);
}
/**
* 获取某一年份的某一月份的天数
*
* @param {Number} year
* @param {Number} month
*/
function getMonthDays(year, month) {
    return [31, null, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month] || (isLeapYear(year) ? 29 : 28);
}
/**
* 获取某年的某天是第几周
* @param {Number} y
* @param {Number} m
* @param {Number} d
* @returns {Number}
*/
function getWeekNumber(y, m, d) {
    var now = new Date(y, m - 1, d),
        year = now.getFullYear(),
        month = now.getMonth(),
        days = now.getDate();
    //那一天是那一年中的第多少天
    for (var i = 0; i < month; i++) {
        days += getMonthDays(year, i);
    } 

    //那一年第一天是星期几
    var yearFirstDay = new Date(year, 0, 1).getDay() || 7; 

    var week = null;
    if (yearFirstDay == 1) {
        week = Math.ceil(days / yearFirstDay);
    } else {
        days -= (7 - yearFirstDay + 1);
        week = Math.ceil(days / 7) + 1;
    } 

    return week;
} 

var DUtil = new DateUtil();