/**
* 获取本周、本季度、本月、上月的开始日期、结束日期
*/var now = new Date(); //当前日期 var nowDayOfWeek = now.getDay(); //今天本周的第几天 var nowDay = now.getDate(); //当前日 var nowMonth = now.getMonth(); //当前月 var nowYear = now.getYear(); //当前年
nowYear += (nowYear < 2000) ? 1900 : 0; //
var lastMonthDate = new Date(); //上月日期
lastMonthDate.setDate(1);
lastMonthDate.setMonth(lastMonthDate.getMonth()-1);
var lastYear = lastMonthDate.getYear();
var lastMonth = lastMonthDate.getMonth();
//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);
}
//获得某月的天数 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;
}
//获得本季度的开始月份 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;
}
//获得本周的开始日期 function getWeekStartDate() {
var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
return formatDate(weekStartDate);
}
//获得本周的结束日期 function getWeekEndDate() {
var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
return formatDate(weekEndDate);
}
//获得本月的开始日期 function getMonthStartDate(){
var monthStartDate = new Date(nowYear, nowMonth, 1);
return formatDate(monthStartDate);
}
//获得本月的结束日期 function getMonthEndDate(){
var days= getMonthDays(nowMonth);//获取当月总共有多少天var monthEndDate = new Date(nowYear, nowMonth, days);
return formatDate(monthEndDate); //返回当月结束时间}
注意：因为上面这个方法里的getMonthDays(nowMonth)方法 我尝试使用失败，我不知道是什么原因 所以我用了另外个方法如下（获得某月的天数,需要配合文章开头的公式 ）：
//获得某月的天数 （与上面有重复可删除，不然本月结束日期报错）function getMonthDays(nowyear,myMonth){
var lastMonthStartDate = new Date(nowyear, lastMonth, 1);
var lastMonthEndDate= new Date(nowyear, lastMonth+ 1, 1);
var days = (lastMonthEndDate- lastMonthStartDate) / (1000 * 60 * 60 * 24);//格式转换 alert(days);
}
//获得上月开始时间function getLastMonthStartDate(){
var lastMonthStartDate = new Date(nowYear, lastMonth, 1);
return formatDate(lastMonthStartDate);
}
//获得上月结束时间function getLastMonthEndDate(){
var lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));
return formatDate(lastMonthEndDate);
}
//获得本季度的开始日期 function getQuarterStartDate(){
var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
return formatDate(quarterStartDate);
}
//或的本季度的结束日期 function getQuarterEndDate(){
var quarterEndMonth = getQuarterStartMonth() + 2;
var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));
return formatDate(quarterStartDate);
}
//获取本年开始-当前时间var currentYear=now.getFullYear();//获得当前年份4位年var currentYearFirstDate=new Date(currentYear,0,1); //本年第一天var startTime = currentYearFirstDate.getFullYear() + ''-'' + (currentYearFirstDate.getMonth() +1) + ''-'' + currentYearFirstDate.getDate()+''''+currentYearFirstDate.getHours()+'':''+currentYearFirstDate.getMinutes()+'':''+
currentYearFirstDate.getSeconds(); //格式化本年第一天日期var currentYearEndDate=now; //当前时间
JS获取本周、本季度、本月、上月的开始日期、结束日期
/** * 获取本周、本季度、本月、上月的开始日期、结束日期 */ var now = new Date(); //当前日期 var nowDayOfWeek = now.getDay(); //今天本周的第几天 var nowDay = now.getDate(); //当前日 var nowMonth = now.getMonth(); //当前月 var nowYear = now.getYear(); //当前年 nowYear += (nowYear < 2000) ? 1900 : 0; //
var lastMonthDate = new Date(); //上月日期 lastMonthDate.setDate(1); lastMonthDate.setMonth(lastMonthDate.getMonth()-1); var lastYear = lastMonthDate.getYear(); var lastMonth = lastMonthDate.getMonth();
//格式化日期：yyyy-MM-dd function formatDate(date) { var myyear = date.getFullYear(); var mymonth = date.getMonth()+1; var myweekday = date.getDate();
//获得某月的天数 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; }
//获得本周的开始日期 function getWeekStartDate() { var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek); return formatDate(weekStartDate); }
//获得本周的结束日期 function getWeekEndDate() { var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek)); return formatDate(weekEndDate); }
//获得本月的开始日期 function getMonthStartDate(){ var monthStartDate = new Date(nowYear, nowMonth, 1); return formatDate(monthStartDate); }
//获得本月的结束日期 function getMonthEndDate(){ var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth)); return formatDate(monthEndDate); }
//获得上月开始时间 function getLastMonthStartDate(){ var lastMonthStartDate = new Date(nowYear, lastMonth, 1); return formatDate(lastMonthStartDate); }
//获得上月结束时间 function getLastMonthEndDate(){ var lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth)); return formatDate(lastMonthEndDate); }
//获得本季度的开始日期 function getQuarterStartDate(){
var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1); return formatDate(quarterStartDate); }
//或的本季度的结束日期 function getQuarterEndDate(){ var quarterEndMonth = getQuarterStartMonth() + 2; var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth)); return formatDate(quarterStartDate); }
