js 转换时间戳为时间格式并且按指定格式输出

/**
*  时间戳转换为日期
*/
function convertTimestamp(timestamp){
    // 时间戳转换为日期
    var d = new Date(timestamp);
    // 日期按指定格式输出(例如: 2018-09-03 17:09:45)
    var year = date.getFullYear();
    var month = date.getMonth() + 1;
    var day = date.getDate();
    var hour = date.getHours();
    var minute = date.getMinutes();
    var second = date.getSeconds();
    
    month = (month<10)?"0"+month:month;
    day = (day <10)?"0"+day :day ;
    hour = (hour <10)?"0"+hour :hour ;
    minute = (minute <10)?"0"+minute :minute ;
    second= (second<10)?"0"+second:second;
    
    // 结果返回 
    return year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second 
}
// 测试
convertTimestamp(1535967523000);

/**
*  日期转换为时间戳
*/
function convertDate(date){
    return Date.parse(date);
}
// 测试
convertDate(new Date());