var getdate=function(){
var now = new Date(); //當前日期
var nowDayOfWeek = now.getDay(); //今天本週的第幾天
var nowDay = now.getDate(); //當前日
var nowMonth = now.getMonth(); //當前月
var nowYear = now.getYear(); //當前年
nowYear += (nowYear < 2000) ? 1900 : 0; //
var lastMonthDate = new Date(); //上月日期
lastMonthDate.setDate(1);
lastMonthDate.setMonth(lastMonthDate.getMonth()-1);
var lastMonth = lastMonthDate.getMonth();//上一月
//格式化日期:yyyy-MM-dd
function formatDate(date) {
var myyear = date.getFullYear();
var mymonth = date.getMonth()+1;
var myweekday = date.getDate();
if(mymonth < 10){
mymonth = "0" + mymonth;
}
if(myweekday < 10){
myweekday = "0" + myweekday;
}
return (myyear+"-"+mymonth + "-" + myweekday);
}
//獲得某月的天數
function getMonthDays(myMonth){
var monthStartDate = new Date(nowYear, myMonth, 1);
var monthEndDate = new Date(nowYear, myMonth + 1, 1);
var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24);
return days;
}
//獲得本季度的開端月份
function getQuarterStartMonth(){
var quarterStartMonth = 0;
if(nowMonth<3){
quarterStartMonth = 0;
}
if(2<nowMonth && nowMonth<6){
quarterStartMonth = 3;
}
if(5<nowMonth && nowMonth<9){
quarterStartMonth = 6;
}
if(nowMonth>8){
quarterStartMonth = 9;
}
return quarterStartMonth;
}
//獲得本週的開端日期
this.getWeekStartDate=function () {
var weekStartDate;
if(nowDayOfWeek==0){
weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek+1-7);
}else{
weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek+1);
}
return formatDate(weekStartDate);
}
//獲得本週的停止日期
this.getWeekEndDate=function() {
var weekEndDate;
if(nowDayOfWeek==0){
weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek)+1-7);
}else{
weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek)+1);
}
return formatDate(weekEndDate);
}
//獲得本月的開端日期
this.getMonthStartDate=function(){
var monthStartDate = new Date(nowYear, nowMonth, 1);
return formatDate(monthStartDate);
}
//獲得本月的停止日期
this.getMonthEndDate=function(){
var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
return formatDate(monthEndDate);
}
//獲得上月開端時候
this.getLastMonthStartDate=function(){
var lastMonthStartDate = new Date(nowYear, lastMonth, 1);
return formatDate(lastMonthStartDate);
}
//獲得上月停止時候
this.getLastMonthEndDate=function(){
var lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));
return formatDate(lastMonthEndDate);
}
//獲得本季度的開端日期
this.getQuarterStartDate=function(){
var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
return formatDate(quarterStartDate);
}
//獲得本季度的停止日期
this.getQuarterEndDate=function(){
var quarterEndMonth = getQuarterStartMonth() + 2;
var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));
return formatDate(quarterStartDate);
}
}
//使用方法
var mydate=new getdate();
alert('本週時間: '+mydate.getWeekStartDate()+'--'+mydate.getWeekEndDate());
JS獲取本週、本季度、本月、上月的開端日期、停止日期
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