JS函数 计算 今日，昨日，本周，上周，本月

时间：2024-04-10 00:08:03

最近有个功能会进行数据的筛选于是便写了几个快速计算 今日，昨日，本周，上周，本月 范围的function 以便以后遇到同样的问题可以直接进行复用，代码如下：

/*

*获取今日的起始和结束时间

*返回值："起始时间,结束时间"

*/

function ToDayStr() {

    var returnStr = "";

    var date = new Date();      //当前时间

    var year = date.getFullYear();

    var month = date.getMonth() + 1;

    var day = date.getDate();

    //var hour = date.getHours();

    //var minutes = date.getMinutes();

    //var second = date.getSeconds();

    month = month < 10 ? "0" + month : month;

    day = day < 10 ? "0" + day : day;

    returnStr = year + "/" + month + "/" + day + " 00:00:00,";       //起始时间

    returnStr += year + "/" + month + "/" + day + " 23:59:59";      //结束时间

    return returnStr;

}

/*

*获取昨日的起始和结束时间

*返回值："起始时间,结束时间"

*/

function YesterDayStr() {

    var date = GetDate(1, 1);       //当前时间前一天

    var returnStr = "";

    var year = date.getFullYear();

    var month = date.getMonth() + 1;

    var day = date.getDate();

    month = month < 10 ? "0" + month : month;

    day = day < 10 ? "0" + day : day;

    returnStr = year + "/" + month + "/" + day + " 00:00:00,";       //起始时间

    returnStr += year + "/" + month + "/" + day + " 23:59:59";      //结束时间

    return returnStr;

}

/*

*获取本周的起始和结束时间

*返回值："起始时间,结束时间"

*/

function ThisWeekStr() {

    var returnStr = "";

    var date = new Date();      //当前时间

    var week = date.getDay();   //获取今天星期几

    var monday = GetDate2(week - 1, 1, date);      //获取星期一

    var sunday = GetDate2(7 - week, 2, date);   //获取星期天

    //起始时间的年月日

    var year1 = monday.getFullYear();

    var month1 = monday.getMonth() + 1;

    var day1 = monday.getDate();

    //结束时间的年月日

    var year2 = sunday.getFullYear();

    var month2 = sunday.getMonth() + 1;

    var day2 = sunday.getDate();

    //处理起始时间小于10的追加"0"在前面

    month1 = month1 < 10 ? "0" + month1 : month1;

    day1 = day1 < 10 ? "0" + day1 : day1;

    //处理结束时间小于10的追加"0"在前面

    month2 = month2 < 10 ? "0" + month2 : month2;

    day2 = day2 < 10 ? "0" + day2 : day2;

    returnStr = year1 + "/" + month1 + "/" + day1 + " 00:00:00,";       //起始时间

    returnStr += year2 + "/" + month2 + "/" + day2 + " 23:59:59";      //结束时间

    return returnStr;

}

/*

*获取上周的起始和结束时间

*返回值："起始时间,结束时间"

*/

function LastWeekStr() {

    var returnStr = "";

    var date = new Date();      //当前时间

    var week = date.getDay();   //获取今天星期几

    var monday = GetDate2(week + 6, 1, date);      //获取上周星期一

    var sunday = GetDate2(week, 1, date);          //获取上周星期天

    //起始时间的年月日

    var year1 = monday.getFullYear();

    var month1 = monday.getMonth() + 1;

    var day1 = monday.getDate();

    //结束时间的年月日

    var year2 = sunday.getFullYear();

    var month2 = sunday.getMonth() + 1;

    var day2 = sunday.getDate();

    //处理起始时间小于10的追加"0"在前面

    month1 = month1 < 10 ? "0" + month1 : month1;

    day1 = day1 < 10 ? "0" + day1 : day1;

    //处理结束时间小于10的追加"0"在前面

    month2 = month2 < 10 ? "0" + month2 : month2;

    day2 = day2 < 10 ? "0" + day2 : day2;

    returnStr = year1 + "/" + month1 + "/" + day1 + " 00:00:00,";       //起始时间

    returnStr += year2 + "/" + month2 + "/" + day2 + " 23:59:59";      //结束时间

    return returnStr;

}

/*

*获取本月的起始和结束时间

*返回值："起始时间,结束时间"

*/

function ThisMonthStr() {

    var returnStr = "";

    var date = new Date();      //当前时间

    var year = date.getFullYear();

    var month = date.getMonth();

    var min = new Date(year, month, 1);                 //本月月初

    var max = new Date(year, month + 1, 0);             //本月月底

    //起始时间的年月日

    var year1 = min.getFullYear();

    var month1 = min.getMonth() + 1;

    var day1 = min.getDate();

    //结束时间的年月日

    var year2 = max.getFullYear();

    var month2 = max.getMonth() + 1;

    var day2 = max.getDate();

    //处理起始时间小于10的追加"0"在前面

    month1 = month1 < 10 ? "0" + month1 : month1;

    day1 = day1 < 10 ? "0" + day1 : day1;

    //处理结束时间小于10的追加"0"在前面

    month2 = month2 < 10 ? "0" + month2 : month2;

    day2 = day2 < 10 ? "0" + day2 : day2;

    returnStr = year1 + "/" + month1 + "/" + day1 + " 00:00:00,";       //起始时间

    returnStr += year2 + "/" + month2 + "/" + day2 + " 23:59:59";      //结束时间

    return returnStr;

}

/*

*获取当前日期前N天或后N日期(N = day)

*type:1：前；2：后

*/

function GetDate(day, type) {

    var zdate = new Date();

    var edate;

    if (type === 1) {

        edate = new Date(zdate.getTime() - (day * 24 * 60 * 60 * 1000));

    } else {

        edate = new Date(zdate.getTime() + (day * 24 * 60 * 60 * 1000));

    }

    return edate;

}

/*

*获取传入的日期前N天或后N日期(N = day)

*type:1：前；2：后

*date：传入的日期

*/

function GetDate2(day, type, date) {

    var zdate;

    if (date === null || date === undefined) {

        zdate = new Date();

    } else {

        zdate = date;

    }

    var edate;

    if (type === 1) {

        edate = new Date(zdate.getTime() - (day * 24 * 60 * 60 * 1000));

    } else {

        edate = new Date(zdate.getTime() + (day * 24 * 60 * 60 * 1000));

    }

    return edate;

}

　这里面需要注意的是不要单纯的在日期或时间上进行加减，注意日期的前后通常处理的都是毫秒数 ，可仿照以上代码中的GetDate 函数思路，仅供参考，如有疑问欢迎大家留言进行交流

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