JS获取本周、本月、本季度、本年

 -------------------------------------------------------------------------------------------------------------------------------

dateRangUtil.js

/**
* 日期范围工具类
*/
var dateRangeUtil = (function () {
    /***
    * 获得当前时间
    */
    this.getCurrentDate = function () {
        return new Date();
    };

    /***
    * 获得本周起止时间
    */
    this.getCurrentWeek = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //返回date是一周中的某一天  
        var week = currentDate.getDay();
        //返回date是一个月中的某一天  
        var month = currentDate.getDate();

        //一天的毫秒数  
        var millisecond = 1000 * 60 * 60 * 24;
        //减去的天数  
        var minusDay = week != 0 ? week - 1 : 6;
        //alert(minusDay);  
        //本周 周一  
        var monday = new Date(currentDate.getTime() - (minusDay * millisecond));
        //本周 周日  
        var sunday = new Date(monday.getTime() + (6 * millisecond));
        //添加本周时间  
        startStop.push(monday.format("yyyy-MM-dd")); //本周起始时间  
        //添加本周最后一天时间  
        startStop.push(sunday.format("yyyy-MM-dd")); //本周终止时间  
        //返回  
        return startStop;
    };

    /***
    * 获得本月的起止时间
    */
    this.getCurrentMonth = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //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();
        //求出本月第一天  
        var firstDay = new Date(currentYear, currentMonth, 1);


        //当为12月的时候年份需要加1  
        //月份需要更新为0 也就是下一年的第一个月  
        if (currentMonth == 11) {
            currentYear++;
            currentMonth = 0; //就为  
        } else {
            //否则只是月份增加,以便求的下一月的第一天  
            currentMonth++;
        }


        //一天的毫秒数  
        var millisecond = 1000 * 60 * 60 * 24;
        //下月的第一天  
        var nextMonthDayOne = new Date(currentYear, currentMonth, 1);
        //求出上月的最后一天  
        var lastDay = new Date(nextMonthDayOne.getTime() - millisecond);

        //添加至数组中返回  
        startStop.push(firstDay.format("yyyy-MM-dd"));
        startStop.push(lastDay.format("yyyy-MM-dd"));
        //返回  
        return startStop;
    };

    /**
    * 得到本季度开始的月份
    * @param month 需要计算的月份
    ***/
    this.getQuarterSeasonStartMonth = function (month) {
        var quarterMonthStart = 0;
        var spring = 0; //春  
        var summer = 3; //夏  
        var fall = 6;   //秋  
        var winter = 9; //冬  
        //月份从0-11  
        if (month < 3) {
            return spring;
        }

        if (month < 6) {
            return summer;
        }

        if (month < 9) {
            return fall;
        }

        return winter;
    };

    /**
    * 获得该月的天数
    * @param year年份
    * @param month月份
    * */
    this.getMonthDays = function (year, month) {
        //本月第一天 1-31  
        var relativeDate = new Date(year, month, 1);
        //获得当前月份0-11  
        var relativeMonth = relativeDate.getMonth();
        //获得当前年份4位年  
        var relativeYear = relativeDate.getFullYear();

        //当为12月的时候年份需要加1  
        //月份需要更新为0 也就是下一年的第一个月  
        if (relativeMonth == 11) {
            relativeYear++;
            relativeMonth = 0;
        } else {
            //否则只是月份增加,以便求的下一月的第一天  
            relativeMonth++;
        }
        //一天的毫秒数  
        var millisecond = 1000 * 60 * 60 * 24;
        //下月的第一天  
        var nextMonthDayOne = new Date(relativeYear, relativeMonth, 1);
        //返回得到上月的最后一天,也就是本月总天数  
        return new Date(nextMonthDayOne.getTime() - millisecond).getDate();
    };

    /**
    * 获得本季度的起止日期
    */
    this.getCurrentSeason = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //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();
        //获得本季度开始月份  
        var quarterSeasonStartMonth = this.getQuarterSeasonStartMonth(currentMonth);
        //获得本季度结束月份  
        var quarterSeasonEndMonth = quarterSeasonStartMonth + 2;

        //获得本季度开始的日期  
        var quarterSeasonStartDate = new Date(currentYear, quarterSeasonStartMonth, 1);
        //获得本季度结束的日期  
        var quarterSeasonEndDate = new Date(currentYear, quarterSeasonEndMonth, this.getMonthDays(currentYear, quarterSeasonEndMonth));
        //加入数组返回  
        startStop.push(quarterSeasonStartDate.format("yyyy-MM-dd"));
        startStop.push(quarterSeasonEndDate.format("yyyy-MM-dd"));
        //返回  
        return startStop;
    };

    /***
    * 得到本年的起止日期
    * 
    */
    this.getCurrentYear = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //获得当前年份4位年  
        var currentYear = currentDate.getFullYear();

        //本年第一天  
        var currentYearFirstDate = new Date(currentYear, 0, 1);
        //本年最后一天  
        var currentYearLastDate = new Date(currentYear, 11, 31);
        //添加至数组  
        startStop.push(currentYearFirstDate.format("yyyy-MM-dd"));
        startStop.push(currentYearLastDate.format("yyyy-MM-dd"));
        //返回  
        return startStop;
    };

    /**
    * 返回上一个月的第一天Date类型
    * @param year 年
    * @param month 月
    **/
    this.getPriorMonthFirstDay = function (year, month) {
        //年份为0代表,是本年的第一月,所以不能减  
        if (month == 0) {
            month = 11; //月份为上年的最后月份  
            year--; //年份减1  
            return new Date(year, month, 1);
        }
        //否则,只减去月份  
        month--;
        return new Date(year, month, 1); ;
    };

    /**
    * 获得上一月的起止日期
    * ***/
    this.getPreviousMonth = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //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 priorMonthFirstDay = this.getPriorMonthFirstDay(currentYear, currentMonth);
        //获得上一月的最后一天  
        var priorMonthLastDay = new Date(priorMonthFirstDay.getFullYear(), priorMonthFirstDay.getMonth(), this.getMonthDays(priorMonthFirstDay.getFullYear(), priorMonthFirstDay.getMonth()));
        //添加至数组  
        startStop.push(priorMonthFirstDay.format("yyyy-MM-dd"));
        startStop.push(priorMonthLastDay.format("yyyy-MM-dd"));
        //返回  
        return startStop;
    };


    /**
    * 获得上一周的起止日期
    * **/
    this.getPreviousWeek = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //返回date是一周中的某一天  
        var week = currentDate.getDay();
        //返回date是一个月中的某一天  
        var month = currentDate.getDate();
        //一天的毫秒数  
        var millisecond = 1000 * 60 * 60 * 24;
        //减去的天数  
        var minusDay = week != 0 ? week - 1 : 6;
        //获得当前周的第一天  
        var currentWeekDayOne = new Date(currentDate.getTime() - (millisecond * minusDay));
        //上周最后一天即本周开始的前一天  
        var priorWeekLastDay = new Date(currentWeekDayOne.getTime() - millisecond);
        //上周的第一天  
        var priorWeekFirstDay = new Date(priorWeekLastDay.getTime() - (millisecond * 6));

        //添加至数组  
        startStop.push(priorWeekFirstDay.format("yyyy-MM-dd"));
        startStop.push(priorWeekLastDay.format("yyyy-MM-dd"));

        return startStop;
    };

    /**
    * 得到上季度的起始日期
    * year 这个年应该是运算后得到的当前本季度的年份
    * month 这个应该是运算后得到的当前季度的开始月份
    * */
    this.getPriorSeasonFirstDay = function (year, month) {
        var quarterMonthStart = 0;
        var spring = 0; //春  
        var summer = 3; //夏  
        var fall = 6;   //秋  
        var winter = 9; //冬  
        //月份从0-11  
        switch (month) {//季度的其实月份  
            case spring:
                //如果是第一季度则应该到去年的冬季  
                year--;
                month = winter;
                break;
            case summer:
                month = spring;
                break;
            case fall:
                month = summer;
                break;
            case winter:
                month = fall;
                break;

        };

        return new Date(year, month, 1);
    };

    /**
    * 得到上季度的起止日期
    * **/
    this.getPreviousSeason = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //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();
        //上季度的第一天  
        var priorSeasonFirstDay = this.getPriorSeasonFirstDay(currentYear, currentMonth);
        //上季度的最后一天  
        var priorSeasonLastDay = new Date(priorSeasonFirstDay.getFullYear(), priorSeasonFirstDay.getMonth() + 2, this.getMonthDays(priorSeasonFirstDay.getFullYear(), priorSeasonFirstDay.getMonth() + 2));
        //添加至数组  
        startStop.push(priorSeasonFirstDay.format("yyyy-MM-dd"));
        startStop.push(priorSeasonLastDay.format("yyyy-MM-dd"));
        return startStop;
    };

    /**
    * 得到去年的起止日期
    * **/
    this.getPreviousYear = function () {
        //起止日期数组  
        var startStop = new Array();
        //获取当前时间  
        var currentDate = this.getCurrentDate();
        //获得当前年份4位年  
        var currentYear = currentDate.getFullYear();
        currentYear--;
        var priorYearFirstDay = new Date(currentYear, 0, 1);
        var priorYearLastDay = new Date(currentYear, 11, 1);
        //添加至数组  
        startStop.push(priorYearFirstDay.format("yyyy-MM-dd"));
        startStop.push(priorYearLastDay.format("yyyy-MM-dd"));
        return startStop;
    };

    return this;
})();

Date.prototype.format = function(fmt) {
    var o = {
        "M+" : this.getMonth()+1, //月份
        "d+" : this.getDate(), //日
        "h+" : this.getHours(), //小时
        "m+" : this.getMinutes(), //分
        "s+" : this.getSeconds(), //秒
        "q+" : Math.floor((this.getMonth()+3)/3), //季度
        "S" : this.getMilliseconds() //毫秒
    };
    if(/(y+)/.test(fmt)) {
        fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));
    }
    for(var k in o) {
        if(new RegExp("("+ k +")").test(fmt)){
            fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length)));
        }
    }
    return fmt;
}

调用方法：

// 周
if(self.time == 1){
    self.startTime =  dateRangeUtil.getCurrentWeek()[0];
    self.endTime = dateRangeUtil.getCurrentWeek()[1]; 
}
// 月
if(self.time == 2){
    self.startTime = dateRangeUtil.getCurrentMonth()[0];
    self.endTime = dateRangeUtil.getCurrentMonth()[1];
}
// 季度
if(self.time == 3){
     self.startTime = dateRangeUtil.getCurrentSeason()[0];
     self.endTime = dateRangeUtil.getCurrentSeason()[1];
}
// 年
if(self.time == 4){
      self.startTime = dateRangeUtil.getCurrentYear()[0];
      self.endTime = dateRangeUtil.getCurrentYear()[1];
}
console.log('startTime:'+self.startTime)
console.log('endTime:'+self.endTime)