前端开发超实用的时间函数的封装

<script>

    /**

     * 根据时间戳获取年、月、日

     * @param String str 时间戳

     * @param Boolean f 是否在原来的基础上*1000，true要*，false或不填就不*

     * @param num type 显示格式，，不传时默认显示年月日

     */

    function getTimes(str, f, type) {

        var t = f ? parseInt(str) * 1000 : parseInt(str)

        var d = new Date(t)

        var y = d.getFullYear()

        var m = setNum(d.getMonth() + 1)

        var da = setNum(d.getDate())

        var m2 = d.getMonth() + 1

        var h = setNum(d.getHours())

        var mm = setNum(d.getMinutes())

        var ss = setNum(d.getSeconds())

        if (type == 1) {

            return y + ‘ ‘ + m + ‘ ‘ + da + ‘ ‘ + h + ‘ ‘ + mm

        } else if (type == 2) {

            return y + ‘年’ + m + ‘月’ + da + ‘日 ‘ + h + ‘:’ + mm + ‘:’ + ss

        } else if (type == 3) {

            return h + ‘:’ + mm + ‘:’ + ss

        } else if (type == 4) {

            return y + ‘ ‘ + m + ‘ ‘ + da + ‘ ‘ + h + ‘ ‘ + mm

        } else if (type == 5) {

            return y + ‘年’ + m + ‘月’ + da + ‘日 ‘

        } else if (type == 6) {

            return da + ” + m2 + ‘月’

        } else if (type == 7) {

            return y + ‘.’ + m + ‘.’ + da

        } else if (type == 8) {

            return y + ‘-‘ + m + ‘-‘ + da

        } else if (type == 9) {

            return y + m + da + h + mm + ss

        } else if (type == 11) {

            return y + ‘-‘ + m + ‘-‘ + da

        } else if (type == 13) {

            return y + ‘-‘ + m + ‘-‘ + da + ‘ ‘ + h + ‘:’ + mm

        } else if (type == 14) {

            return y

        } else if (type == 15) {

            return m + ‘月’ + da + ‘日’

        } else {

            return y + ‘/’ + m + ‘/’ + da

        }

    }

    /*个位补零*/

    function setNum(s) {

        return parseInt(s) > 9 ? s : ‘0’ + s

    }

    /**

     * 把年月日（2015-10-20）转变为时间戳

     * @param String dateStr 日期

     */

    function getTimeStr(dateStr) {

        var newstr = dateStr.replace(/-/g, ‘/’)

        var date = new Date(newstr)

        var time_str = date.getTime().toString()

        return time_str.substr(0, 10)

    }

    /**

     * 根据年、月、日获取时间戳

     * @param String str 年、月、日

     */

    function stringToTime(stringData) {

        stringData = stringData.replace(/-/g, ‘/’)

        var date = new Date(stringData)

        var time = date.getTime()

        return time

    }

</script>

<script>

    /* 计算时间差

     * @param Long createTime 时间戳

     */

    function getDateDiff(time) {

        var result1 = ”

        var str2 = time

        var minute = 1000 * 60

        var hour = minute * 60

        var day = hour * 24

        var halfamonth = day * 15

        var month = day * 30

        var now = new Date().getTime()

        var diffValue = now – str2

        var monthC = diffValue / month

        var weekC = diffValue / (7 * day)

        var dayC = diffValue / day

        var hourC = diffValue / hour

        var minC = diffValue / minute

        if (monthC >= 1) {

            result1 = getTimes(str2, false, 15)

        } else if (weekC >= 1) {

            result1 = parseInt(weekC) + ‘周前’

        } else if (dayC >= 1) {

            result1 = parseInt(dayC) + ‘天前’

        } else if (hourC >= 1) {

            result1 = parseInt(hourC) + ‘个小时前’

        } else if (minC >= 1) {

            result1 = parseInt(minC) + ‘分钟前’

        } else result1 = ‘刚刚发表’

        return result1

    }

</script>