JS获取本周、本季度、本月、上月的开始日期、结束日期详解编程语言

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); //今天 var getCurrentDate = new Date(nowYear, nowMonth, nowDay); var getCurrentDate = formatDate(getCurrentDate) //昨天 var getYesterdayDate = new Date(nowYear, nowMonth, nowDay - 1); var getYesterdayDate = formatDate(getYesterdayDate); //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 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); }

 

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