js獲取本周日期和上周日期

• 前言
• 一、前端頁面顯示
• 二、js判斷
• 總結(jié)

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前言

功能需求：根據(jù)當(dāng)前日期獲取到本周一、本周五、上周一和上周五的日期，然后填充到前端控件中顯示

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一、前端頁面顯示

當(dāng)前日期為 2022-08-22 ，根據(jù)邏輯判斷如下：
本周一為 2022-08-22，本周五為2022-08-26
上周一為 2022-08-15，上周五為2022-08-19

前端頁面顯示：

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二、js判斷

jsp判斷如下：

//頁面初始化時(shí)加載 var _onload=function(){//當(dāng)前日期 2022-08-22 17:30:30 var today = new Date(); //構(gòu)建當(dāng)前日期,格式：2022-08-22 00:00:00var year = today.getFullYear(); //本年 var month = today.getMonth()+1; //本月var day = today.getDate(); //本日var newDate = new Date(year+"-"+month+"-"+day+" 00:00:00"); //年月日拼接var nowTime = newDate.getTime(); //當(dāng)前的時(shí)間戳var weekDay = newDate.getDay(); //當(dāng)前星期 0.1.2.3.4.5.6 【0 = 周日】var oneDayTime = 24*60*60*1000; //一天的總msvar mondayTime = (1-weekDay) * oneDayTime + nowTime; //本周一的時(shí)間戳var tuesdayTime = (2-weekDay) * oneDayTime + nowTime; //本周二的時(shí)間戳var wednesdayTime = (3-weekDay) * oneDayTime + nowTime; //本周三的時(shí)間戳var thursdayTime = (4-weekDay) * oneDayTime + nowTime; //本周四的時(shí)間戳var fridayTime = (5-weekDay) * oneDayTime + nowTime; //本周五的時(shí)間戳var saturdayTime = (6-weekDay) * oneDayTime + nowTime; //本周六的時(shí)間戳var sundayTime = (7-weekDay) * oneDayTime + nowTime; //本周日的時(shí)間戳var lastMondayTime = nowTime - (weekDay+6)*oneDayTime; //上周一的時(shí)間戳var lastTuesdayTime = nowTime - (weekDay+5)*oneDayTime; //上周二的時(shí)間戳var lastWednesdayyTime = nowTime - (weekDay+4)*oneDayTime; //上周三的時(shí)間戳var lastThursdayTime = nowTime - (weekDay+3)*oneDayTime; //上周四的時(shí)間戳var lastFirdayTime = nowTime - (weekDay+2)*oneDayTime; //上周五的時(shí)間戳var lastSaturdayTime = nowTime - (weekDay+1)*oneDayTime; //上周六的時(shí)間戳var lastSundayTime = nowTime - (weekDay+0)*oneDayTime; //上周日的時(shí)間戳this.data.monday = mondayTime; //本周一日期賦值this.data.firday = firdayTime; //本周五日期賦值this.data.lastMonday = lastMondayTime; //上周一日期賦值this.data.lastFirday = lastFirdayTime; //上周五日期賦值 }

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總結(jié)

邏輯思路：
1、根據(jù)當(dāng)前日期拿到當(dāng)前時(shí)間戳 nowTime = newDate.getTime() ；
2、根據(jù)當(dāng)親日期拿到當(dāng)前的星期 weekDay = newDate.getDay() 0代表周日，0-6為周日到周六 ；
3、計(jì)算出一天的總ms數(shù) oneDayTime = 24 * 60 * 60 * 1000 ，每增加一天就要加一次一天的ms數(shù)；
4、計(jì)算本周日期公式 ：(N - weekDay ) * oneDayTime + nowTime ，N：1到7 代表周一到周日；
5、計(jì)算上周日期公式 ：nowTime - (weekDay + M) * oneDayTime ，M：0-6 代表周日到周一；

總結(jié)

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