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JS Date时间函数

2.天/周：今天/昨天/近三天/近七天/本周

var DateUtil = new function()
{ 
    /**
    * 获取：今天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getCurrentDays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(0, 0);
    };
    /**
    * 获取：昨天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getYesterdays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(-1, -1);
    };
    /**
    * 获取：近三天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getNearlyThreeDays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(-2, 0);
    };
    /**
    * 获取：近七天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getNearlySevenDays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(-6, 0);
    };
    /**
    * 获取：本周
    * seed： 种子，默认是0，代表每周从礼拜天开始
    */
    this.getCurrentWeek = function(date, seed = 0)
    { 
        date = date || new Date();
        // 以数值获取周名（0-6）
        const weekIndex = date.getDay();
        const startIndex = seed - weekIndex;
        const endIndex = seed + 6 - weekIndex;
        return date.getRangeDate(startIndex, endIndex);
    };
    /**
    * 获取时间区间
    * startDay： 距离当前日期多少天，负数为历史日期
    * endDay： 距离当前日期多少天，负数为历史日期
    */
    this.getRangeDate = function(date, startDay, endDay)
    { 
        date = date || new Date();
        return date.getRangeDate(startDay, endDay);
    };
    return this; 
}();

View Code

3.月/旬：上旬/中旬/下旬/本月

var DateUtil = new function()
{ 
    /**
    * 获取：上旬
    */
    this.getEarlyDays = function(date)
    { 
        date = date || new Date();
        var startDate = date.setDate(1);
        var endDate = date.setDate(10);
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
    /**
    * 获取：中旬
    */
    this.getMidDays = function(date)
    { 
        date = date || new Date();
        var startDate = date.setDate(11);
        var endDate = date.setDate(20);
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
    /**
    * 获取：下旬
    */
    this.getLatesDays = function(date)
    { 
        date = date || new Date();
        var startDate = date.setDate(21);
        var endDate = date.getMonthMaxDay();
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
    /**
    * 获取：本月
    */
    this.getMonths = function(date)
    { 
        date = date || new Date();
        var startDate = date.getMonthMinDay();
        var endDate = date.getMonthMaxDay();
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
}();

View Code

4.月/季：第一季度/第二季度/第三季度/第四季度/今年

var DateUtil = new function()
{ 
    /**
    * 获取：第一季度
    */
    this.getFirstQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-01-01').resetMinTime();
        var endDate = new Date(currentYear+'-04-01').getYesterday().resetMaxTime();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：第二季度
    */
    this.getSecondQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-04-01').resetMinTime();
        var endDate = new Date(currentYear+'-07-01').getYesterday().resetMaxTime();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：第三季度
    */
    this.getThirdQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-07-01').resetMinTime();
        var endDate = new Date(currentYear+'-10-01').getYesterday().resetMaxTime();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：第四季度
    */
    this.getFourthQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-10-01').resetMinTime();
        var endDate = date.getYearMaxDay();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：今年
    */
    this.getYearDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = date.getYearMinDay();
        var endDate = date.getYearMaxDay();
        return new Array(startDate, endDate);
    };
    return this; 
}();

View Code

5.拓展函数：Link

/**
* 获取当前月最小天数
*/
Date.prototype.getMonthMinDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    return date.resetMinTime();
}

/**
* 获取当前月最大天数
*/
Date.prototype.getMonthMaxDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    date.setMonth(date.getMonth() + 1);
    return date.addDay(-1, 1);
}

/**
* 获取当前年最小天数
*/
Date.prototype.getYearMinDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    date.setMonth(0); // 获取月（0-11）
    return date.resetMinTime();
}

/**
* 获取当前年最大天数
*/
Date.prototype.getYearMaxDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    date.setMonth(0); // 获取月（0-11）
    date.setFullYear(date.getFullYear() + 1);
    return date.addDay(-1, 1);
}

/**
* 获取昨天
* type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
*/
Date.prototype.getYesterday = function(type)
{ 
    const yesterdayTime = this.addDay(-1, type); 
    return yesterdayTime;
}

/**
* 获取时间区间
* startDay： 距离当前日期多少天，负数为历史日期
* endDay： 距离当前日期多少天，负数为历史日期
*/
Date.prototype.getRangeDate = function(startDay, endDay)
{ 
    const currentDate = this;
    var startDate = currentDate.addDay(startDay, 1);
    var endDate = currentDate.addDay(endDay, 2);
    
    return new Array(startDate, endDate);
}

/**
* 获取时间区间
* dayNum： 增加天数，负数为历史日期
* type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
*/
Date.prototype.addDay = function(dayNum, type = 0)
{ 
    let currentDate = this;
    if(type == 1) currentDate = this.resetMinTime();
    else if(type == 2) currentDate = this.resetMaxTime();
    else {}
    const newTime = currentDate.getTime() + (24 * 60 * 60 * 1000 * dayNum)
    return new Date(newTime);
}

/**
* 设置时分秒
*/
Date.prototype.setTime = function(hours, minutes, seconds)
{ 
    let myDate = this; 
    myDate.setHours(hours);
    myDate.setMinutes(minutes);
    myDate.setSeconds(seconds);
    myDate.setMilliseconds(0);
    return myDate;
}

/**
* 重置时分秒[00:00:00]
*/
Date.prototype.resetMinTime = function()
{ 
    return this.setTime(0, 0, 0);
}

/**
* 重置时分秒[23:59:59]
*/
Date.prototype.resetMaxTime = function()
{ 
    return this.setTime(23, 59, 59);
}

/**
* 把日期分割成数组 [年、月、日、时、分、秒]
*/
Date.prototype.toArray = function()  
{   
    var myArray = Array();  
    myArray[0] = this.getFullYear();  
    myArray[1] = this.getMonth() + 1;  // 获取月（0-11）
    myArray[2] = this.getDate();  
    myArray[3] = this.getHours();  
    myArray[4] = this.getMinutes();  
    myArray[5] = this.getSeconds();  
    return myArray;  
}

View Code

6.demo

/**
* 获取当前月最小天数
*/
Date.prototype.getMonthMinDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    return date.resetMinTime();
}

/**
* 获取当前月最大天数
*/
Date.prototype.getMonthMaxDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    date.setMonth(date.getMonth() + 1);
    return date.addDay(-1, 1);
}

/**
* 获取当前年最小天数
*/
Date.prototype.getYearMinDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    date.setMonth(0); // 获取月（0-11）
    return date.resetMinTime();
}

/**
* 获取当前年最大天数
*/
Date.prototype.getYearMaxDay = function(date)
{ 
    date = arguments[0] || new Date();
    date.setDate(1);
    date.setMonth(0); // 获取月（0-11）
    date.setFullYear(date.getFullYear() + 1);
    return date.addDay(-1, 1);
}

/**
* 获取昨天
* type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
*/
Date.prototype.getYesterday = function(type)
{ 
    const yesterdayTime = this.addDay(-1, type); 
    return yesterdayTime;
}

/**
* 获取时间区间
* startDay： 距离当前日期多少天，负数为历史日期
* endDay： 距离当前日期多少天，负数为历史日期
*/
Date.prototype.getRangeDate = function(startDay, endDay)
{ 
    const currentDate = this;
    var startDate = currentDate.addDay(startDay, 1);
    var endDate = currentDate.addDay(endDay, 2);
    
    return new Array(startDate, endDate);
}

/**
* 获取时间区间
* dayNum： 增加天数，负数为历史日期
* type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
*/
Date.prototype.addDay = function(dayNum, type = 0)
{ 
    let currentDate = this;
    if(type == 1) currentDate = this.resetMinTime();
    else if(type == 2) currentDate = this.resetMaxTime();
    else {}
    const newTime = currentDate.getTime() + (24 * 60 * 60 * 1000 * dayNum)
    return new Date(newTime);
}

/**
* 设置时分秒
*/
Date.prototype.setTime = function(hours, minutes, seconds)
{ 
    let myDate = this; 
    myDate.setHours(hours);
    myDate.setMinutes(minutes);
    myDate.setSeconds(seconds);
    myDate.setMilliseconds(0);
    return myDate;
}

/**
* 重置时分秒[00:00:00]
*/
Date.prototype.resetMinTime = function()
{ 
    return this.setTime(0, 0, 0);
}

/**
* 重置时分秒[23:59:59]
*/
Date.prototype.resetMaxTime = function()
{ 
    return this.setTime(23, 59, 59);
}

/**
* 把日期分割成数组 [年、月、日、时、分、秒]
*/
Date.prototype.toArray = function()  
{   
    var myArray = Array();  
    myArray[0] = this.getFullYear();  
    myArray[1] = this.getMonth() + 1;  // 获取月（0-11）
    myArray[2] = this.getDate();  
    myArray[3] = this.getHours();  
    myArray[4] = this.getMinutes();  
    myArray[5] = this.getSeconds();  
    return myArray;  
}

var DateUtil = new function()
{ 
    /**
    * 获取：今天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getCurrentDays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(0, 0);
    };
    /**
    * 获取：昨天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getYesterdays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(-1, -1);
    };
    /**
    * 获取：近三天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getNearlyThreeDays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(-2, 0);
    };
    /**
    * 获取：近七天
    * type： 0-不修改时间；1-重置为最小时间；2-重置为最大时间
    */
    this.getNearlySevenDays = function(date, type = 0)
    { 
        date = date || new Date();
        return date.getRangeDate(-6, 0);
    };
    /**
    * 获取：本周
    * seed： 种子，默认是0，代表每周从礼拜天开始
    */
    this.getCurrentWeek = function(date, seed = 0)
    { 
        date = date || new Date();
        // 以数值获取周名（0-6）
        const weekIndex = date.getDay();
        const startIndex = seed - weekIndex;
        const endIndex = seed + 6 - weekIndex;
        return date.getRangeDate(startIndex, endIndex);
    };
    /**
    * 获取：上旬
    */
    this.getEarlyDays = function(date)
    { 
        date = date || new Date();
        var startDate = date.setDate(1);
        var endDate = date.setDate(10);
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
    /**
    * 获取：中旬
    */
    this.getMidDays = function(date)
    { 
        date = date || new Date();
        var startDate = date.setDate(11);
        var endDate = date.setDate(20);
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
    /**
    * 获取：下旬
    */
    this.getLatesDays = function(date)
    { 
        date = date || new Date();
        var startDate = date.setDate(21);
        var endDate = date.getMonthMaxDay();
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
    /**
    * 获取：本月
    */
    this.getMonths = function(date)
    { 
        date = date || new Date();
        var startDate = date.getMonthMinDay();
        var endDate = date.getMonthMaxDay();
        return new Array(new Date(startDate).resetMinTime(), new Date(endDate).resetMinTime());
    };
    /**
    * 获取：第一季度
    */
    this.getFirstQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-01-01').resetMinTime();
        var endDate = new Date(currentYear+'-04-01').getYesterday().resetMaxTime();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：第二季度
    */
    this.getSecondQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-04-01').resetMinTime();
        var endDate = new Date(currentYear+'-07-01').getYesterday().resetMaxTime();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：第三季度
    */
    this.getThirdQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-07-01').resetMinTime();
        var endDate = new Date(currentYear+'-10-01').getYesterday().resetMaxTime();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：第四季度
    */
    this.getFourthQuarterDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = new Date(currentYear+'-10-01').resetMinTime();
        var endDate = date.getYearMaxDay();
        return new Array(startDate, endDate);
    };
    /**
    * 获取：今年
    */
    this.getYearDays = function(date)
    { 
        date = date || new Date();
        const currentYear = date.getFullYear();
        var startDate = date.getYearMinDay();
        var endDate = date.getYearMaxDay();
        return new Array(startDate, endDate);
    };
    return this; 
}();