1)定义方法
//date.js //前导0 export const addZero = function(n){ return n >= 10 ? n : '0' + n } //时间对象格式化 export const dateFormat = function(date){ return date.getFullYear() + "-" + addZero(date.getMonth()+1) + "-" + addZero(date.getDate()); } /** * 获得相对当前周AddWeekCount个周的起止日期 * AddWeekCount为0代表当前周 为-1代表上一个周 为1代表下一个周以此类推 * **/ export const getWeekStartAndEnd = function(AddWeekCount){ //一天的毫秒数 var millisecond = 1000 * 60 * 60 * 24; //获取当前时间 var currentDate = new Date(); //相对于当前日期AddWeekCount个周的日期 currentDate = new Date(currentDate.getTime() + (millisecond * 7 * AddWeekCount)); //减去的天数 var minusDay = currentDate.getDay(); //获得当前周的第一天 var currentWeekFirstDay = new Date(currentDate.getTime() - (millisecond * minusDay)); //获得当前周的最后一天 var currentWeekLastDay = new Date(currentWeekFirstDay.getTime() + (millisecond * 6)); //起止日期数组 var startStop = new Array(); startStop.push(dateFormat(currentWeekFirstDay)); startStop.push(dateFormat(currentWeekLastDay)); return startStop; } /** * 获得相对当月AddMonthCount个月的起止日期 * AddMonthCount为0 代表当月 为-1代表上一个月 为1代表下一个月 以此类推 * ***/ export const getMonthStartAndEnd = function(AddMonthCount) { //获取当前时间 var currentDate = new Date(); var month = currentDate.getMonth() + AddMonthCount; if(month < 0){ var n = parseInt((-month)/12); month += n*12; currentDate.setFullYear(currentDate.getFullYear()-n); } currentDate = new Date(currentDate.setMonth(month)); //获得当前月份0-11 var currentMonth = currentDate.getMonth(); //获得当前年份4位年 var currentYear = currentDate.getFullYear(); //获得上一个月的第一天 var currentMonthFirstDay = new Date(currentYear, currentMonth,1); //获得上一月的最后一天 var currentMonthLastDay = new Date(currentYear, currentMonth+1, 0); //起止日期数组 var startStop = new Array(); startStop.push(dateFormat(currentMonthFirstDay)); startStop.push(dateFormat(currentMonthLastDay)); //返回 return startStop; }
2)使用封装方法:
import {dateFormat} from 'service/date' var date = dateFormat(new Date()) console.log(date) //2019-03-29