时间常用方法

集合了一些时间上的处理方法

/**
 * [setNdayDate 获取n天后日期(转格式后的)]
 * @param {[type]} num [天数] _time [传入时间]
 */
function setNdayDate(num, _time) {
    let _this = this;
    let d = new Date();
    if (_time) {
        d = new Date(_time.replace(/-/g, "/"));
    }
    let year = d.getFullYear();
    let month = _this.addZero(d.getMonth() + 1);
    let day = _this.addZero(d.getDate());
    let hour = _this.addZero(d.getHours());
    let min = _this.addZero(d.getMinutes());
    let sec = _this.addZero(d.getSeconds());

    //今天
    let new_day = year + '-' + month + '-' + day + ' ' + hour + ':' + min + ':' + sec;
    let old_day = new_day;
    if (num != 0) {
        //num天后
        d.setDate(parseFloat(day) + parseFloat(num));
        let old_year = d.getFullYear();
        let old_month = _this.addZero(d.getMonth() + 1);
        old_day = _this.addZero(d.getDate());
        let old_hour = _this.addZero(d.getHours());
        let old_min = _this.addZero(d.getMinutes());
        let old_sec = _this.addZero(d.getSeconds());

        old_day = old_year + '-' + old_month + '-' + old_day + ' ' + old_hour + ':' + old_min + ':' + old_sec;
    }
    return {
        new_day: new_day,
        new_day_str: Date.parse(new_day.replace(/-/g, "/")),
        old_day: old_day,
        old_day_str: Date.parse(old_day.replace(/-/g, "/")),
    }
}

/**
 * [计算出时间差]
 * @param  {[type]} str1 [2010-10-20 15:00:00]
 * @param  {[type]} str2 [2011-10-20 15:00:00]
 */
function timeDifference(str1, str2) {
    let date1 = Date.parse(str1.replace(/-/g, "/")); //开始时间
    let date2 = Date.parse(str2.replace(/-/g, "/")); //结束时间
    let date3 = date2 - date1; //时间差的毫秒数

    //计算出相差天数
    let days = Math.floor(date3 / (24 * 3600 * 1000));
    //计算天数后剩余的毫秒数
    let leave1 = date3 % (24 * 3600 * 1000);
    //计算出小时数
    let hours = Math.floor(leave1 / (3600 * 1000));
    //计算小时数后剩余的毫秒数
    let leave2 = leave1 % (3600 * 1000);
    //计算相差分钟数
    let minutes = Math.floor(leave2 / (60 * 1000));
    //计算分钟数后剩余的毫秒数
    let leave3 = leave2 % (60 * 1000);
    //计算相差秒数
    let seconds = Math.round(leave3 / 1000);

    return {
        _date3: date3,
        _days: days,
        _hours: hours,
        _minutes: minutes,
        _seconds: seconds,
    }
}

/**
 * [获取n分钟后的日期(转格式后的)]
 * @param {[type]} minutes [分钟数]
 */
function setNMinuteDate(num) {
    let date = new Date();
    let seperator1 = "-";
    let seperator2 = ":";

    let interTimes = num * 60 * 1000;

    date = new Date(Date.parse(date) + interTimes);

    let month = date.getMonth() + 1;
    let strDate = date.getDate();
    let hour = date.getHours();
    let minutes = date.getMinutes();
    let seconds = date.getSeconds()
    if (month >= 1 && month <= 9) {
        month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
        strDate = "0" + strDate;
    }
    if (hour >= 0 && hour <= 9) {
        hour = "0" + hour;
    }
    if (minutes >= 0 && minutes <= 9) {
        minutes = "0" + minutes;
    }
    if (seconds <= 9) {
        seconds = '0' + seconds;
    }

    let resdate = date.getFullYear() + seperator1 + month + seperator1 + strDate +
        " " + hour + seperator2 + minutes +
        seperator2 + seconds;
    return resdate;
}

/**
 * [获取n毫秒后的日期(转格式后的)]
 * @param  {[string } time    [ 时间字符串]
 * @param  {[number]} seconds [ 距离这个时间多少毫秒]
 * @return {string}         返回这个格式的时间字符串 2017-02-20 17:49:01
 */
function formatTimeStr(time, seconds) {
    let _t1 = new Date(Date.parse(time.replace(/-/g, "/"))).getTime() + seconds;
    time = new Date(_t1);
    let y = time.getFullYear(); //年
    let m = time.getMonth() + 1; //月
    let d = time.getDate(); //日
    let h = time.getHours(); //时
    let mm = time.getMinutes(); //分
    let s = time.getSeconds(); //秒
    return y + "-" + this.addZero(m) + "-" + this.addZero(d) + " " + this.addZero(h) + ":" + this.addZero(mm) + ":" + this.addZero(s);
}

/**
 * [格式化时间将时间戳转为时间(转格式后的)]
 * @param  {[string } time    [ 时间字符串]
 * @return {string}         返回这个格式的时间字符串 2017-02-20 17:49:01
 */
function formatTimestamp(time) {
    console.log(time, '????????????????')
    time = new Date(time);
    console.log(time, '22222222222222222')
    let y = time.getFullYear(); //年
    let m = time.getMonth() + 1; //月
    let d = time.getDate(); //日
    let h = time.getHours(); //时
    let mm = time.getMinutes(); //分
    let s = time.getSeconds(); //秒
    return y + "-" + this.addZero(m) + "-" + this.addZero(d) + " " + this.addZero(h) + ":" + this.addZero(mm) + ":" + this.addZero(s);
}