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();