时间戳获取16位随机ID的两种办法

1.手写getUUIDTOLong方法，使用的时候直接调用即可

public static synchronized Long getUUIDTOLong() {
    try {
        Thread.sleep(1);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    String msg = "";
    Date date = new Date();
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
    msg = sdf.format(date).substring(2);
    return Long.parseLong(msg);
}

2.快速生成16位ID，直接set赋值即可

long imrID = System.currentTimeMillis();
String imrId = String.valueOf(imrID);