获取IP和byte转long遇到的小问题

介绍

因为业务需求新项目的流水号系统从 ‘数据库自增步长+分段式锁’ 换成使用雪花流水号, 修改机器标识和数据中心字段为自动获取ip后三位, 人工保证ip后三位不相同

示例

修改内容如下:
删除构造, 修改数据位数, 添加静态代码块

private final static long MACHINE_BIT = 8;
private final static long DATA_CENTER_BIT = 2;
static {
    try {
        InetAddress localHost = InetAddress.getLocalHost();
        address = localHost.getAddress()[3] & 0xff;
        System.out.println("当前系统的 address 为: " + address);
    } catch (UnknownHostException e) {
        throw new IllegalArgumentException("DATA_CENTER_ID can't be greater than MAX_DATA_CENTER_NUM or less than 0");
    }
}