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前言

功能需求：根据当前日期获取到本周一、本周五、上周一和上周五的日期，然后填充到前端控件中显示

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一、前端页面显示

当前日期为 2022-08-22 ，根据逻辑判断如下：
本周一为 2022-08-22，本周五为2022-08-26
上周一为 2022-08-15，上周五为2022-08-19

前端页面显示：

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二、js判断

jsp判断如下：

//页面初始化时加载
var _onload=function(){
  //当前日期 2022-08-22 17:30:30  
  var today = new Date();  

  //构建当前日期,格式：2022-08-22 00:00:00
  var 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(); //当前的时间戳
  var weekDay = newDate.getDay(); //当前星期 0.1.2.3.4.5.6 【0 = 周日】
  var oneDayTime = 24*60*60*1000; //一天的总ms

  var mondayTime = (1-weekDay) * oneDayTime + nowTime; //本周一的时间戳
  var tuesdayTime = (2-weekDay) * oneDayTime + nowTime; //本周二的时间戳
  var wednesdayTime = (3-weekDay) * oneDayTime + nowTime; //本周三的时间戳
  var thursdayTime = (4-weekDay) * oneDayTime + nowTime; //本周四的时间戳
  var fridayTime = (5-weekDay) * oneDayTime + nowTime; //本周五的时间戳
  var saturdayTime = (6-weekDay) * oneDayTime + nowTime; //本周六的时间戳
  var sundayTime = (7-weekDay) * oneDayTime + nowTime; //本周日的时间戳

  var lastMondayTime = nowTime - (weekDay+6)*oneDayTime; //上周一的时间戳
  var lastTuesdayTime = nowTime - (weekDay+5)*oneDayTime; //上周二的时间戳
  var lastWednesdayyTime = nowTime - (weekDay+4)*oneDayTime; //上周三的时间戳
  var lastThursdayTime = nowTime - (weekDay+3)*oneDayTime; //上周四的时间戳
  var lastFirdayTime = nowTime - (weekDay+2)*oneDayTime; //上周五的时间戳
  var lastSaturdayTime = nowTime - (weekDay+1)*oneDayTime; //上周六的时间戳
  var lastSundayTime = nowTime - (weekDay+0)*oneDayTime; //上周日的时间戳

  this.data.monday = mondayTime; //本周一日期赋值
  this.data.firday = firdayTime; //本周五日期赋值
  this.data.lastMonday = lastMondayTime; //上周一日期赋值
  this.data.lastFirday = lastFirdayTime; //上周五日期赋值
}

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总结

逻辑思路：
1、根据当前日期拿到当前时间戳 nowTime = newDate.getTime() ；
2、根据当亲日期拿到当前的星期 weekDay = newDate.getDay() 0代表周日，0-6为周日到周六 ；
3、计算出一天的总ms数 oneDayTime = 24 * 60 * 60 * 1000 ，每增加一天就要加一次一天的ms数；
4、计算本周日期公式 ：(N - weekDay ) * oneDayTime + nowTime ，N：1到7 代表周一到周日；
5、计算上周日期公式 ：nowTime - (weekDay + M) * oneDayTime ，M：0-6 代表周日到周一；