public class Mac { public static void main(String[] args) { try { Enumerationenumeration = NetworkInterface.getNetworkInterfaces(); while (enumeration.hasMoreElements()) { StringBuffer stringBuffer = new StringBuffer(); NetworkInterface networkInterface = enumeration.nextElement(); if (networkInterface != null) { byte[] bytes = networkInterface.getHardwareAddress(); if (bytes != null) { for (int i = 0; i < bytes.length; i++) { if (i != 0) { stringBuffer.append("-"); } int tmp = bytes[i] & 0xff; // 字节转换为整数 String str = Integer.toHexString(tmp); if (str.length() == 1) { stringBuffer.append("0" + str); } else { stringBuffer.append(str); } } String mac = stringBuffer.toString().toUpperCase(); System.out.println(mac); } } } } catch (Exception e) { e.printStackTrace(); } } }
在我的开发机(Windows)上运行上面代码可以获取多个Mac地址(安装了VM有若干虚拟的),但在服务器上却只能获取到一个Mac地址,请问这是为什么呢?
我却只能获取到【XX-XX-54-B3-6B-28】这一个Mac请问为什么呢?应该一个是有线网卡,一个是无线网卡获取到两个才对,可是【XX-XX-54-B3-6B-29】却获取不到
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仍未找到问题所在,临时解决办法是Windows中使用以上代码获取所有Mac,而在Linux(CentOS 7.0)中通过读取
public class Mac { public static void main(String[] args) throws Exception { StringBuffer sb = new StringBuffer(); try { String str = "cat /sys/class/net/*/address | sed -n '1p'"; String[] cmd = new String[] { "/bin/sh", "-c", str }; Process process = Runtime.getRuntime().exec(cmd); BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream())); String line; while ((line = br.readLine()) != null) { sb.append(line); } } catch (IOException e) { e.printStackTrace(); } String mac = sb.toString().replace(":", "-").toUpperCase(); } }
你服务器上还装了无线网卡? 我台式机都没装
InetAddress address = InetAddress.getLocalHost();
NetworkInterface ni = NetworkInterface.getByInetAddress(address);
byte[] macs = ni.getHardwareAddress();
String mac = "";
Formatter formatter = new Formatter();
for (int i = 0; i < macs.length; i++) {
mac = formatter.format(Locale.getDefault(), "%02X%s", macs[i], i < macs.length - 1 ? "-" : "").toString();
}
return mac;
你服务器上 eno2 那个网络接口的 flag 没有 running 状态,是不是没启用?
用 mii-tool 之类的命令检查一下。