Web前端编程入门--js时间转换

function jsonDateFormat(jsonDate) {
    //json日期格式转换为正常格式
    var jsonDateStr = jsonDate.toString();//此处用到toString（）是为了让传入的值为字符串类型，目的是为了避免传入的数据类型不支持.replace（）方法
    try {
        var k = parseInt(jsonDateStr.replace("/Date(", "").replace(")/", ""), 10);
        if (k < 0)
            return null;

        var date = new Date(parseInt(jsonDateStr.replace("/Date(", "").replace(")/", ""), 10));
        var month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
        var day = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
        var hours = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
        var minutes = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
        var seconds = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
        var milliseconds = date.getMilliseconds();
        return date.getFullYear() + "-" + month + "-" + day + " " + hours + ":" + minutes + ":" + seconds;
    }
    catch (ex) {
        return "时间格式转换错误";
    }
}

function dateTimeDiff(diff) {
    var myDate = new DateTimeAdd(‘d‘, diff);
    //获取当前年
    var year = myDate.getFullYear();
    //获取当前月
    var month = myDate.getMonth() + 1;
    //获取当前日
    var date = myDate.getDate();
    var h = myDate.getHours();       //获取当前小时数(0-23)
    var m = myDate.getMinutes();     //获取当前分钟数(0-59)
    var s = myDate.getSeconds();

    var now = year + ‘-‘ + p(month) + "-" + p(date) + " " + p(h) + ‘:‘ + p(m) + ":" + p(s);
    return now;
}

/**
 * 获取当前时间
 */
function p(s) {
    return s < 10 ? ‘0‘ + s : s;
}

function DateTimeAdd(strInterval, Number) {
    var dtTmp = new Date();
    switch (strInterval) {
        case ‘s‘: return new Date(Date.parse(dtTmp) + (1000 * Number));
        case ‘n‘: return new Date(Date.parse(dtTmp) + (60000 * Number));
        case ‘h‘: return new Date(Date.parse(dtTmp) + (3600000 * Number));
        case ‘d‘: return new Date(Date.parse(dtTmp) + (86400000 * Number));
        case ‘w‘: return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
        case ‘q‘: return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
        case ‘m‘: return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
        case ‘y‘: return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
    }
}