js格式化时间戳

js格式化时间戳为yyyy-MM-dd HH:mm:ss

function getLocalTime(timestamp) {
    var d = new Date(timestamp);
    var date = (d.getFullYear()) + "-" +
            (d.getMonth() + 1) + "-" +
            (d.getDate()) + " " +
            (d.getHours()) + ":" +
            (d.getMinutes()) + ":" +
            (d.getSeconds());
    return date;
}