将MAC地址字节数组格式化为String [英] Formatting MAC address byte array to String
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问题描述
我正在使用此代码查找计算机的MAC地址。此代码直接打印MAC地址,但我想将其作为字符串返回。我完全糊涂了。
I am using this code to find the MAC address of a machine. This code prints directly the MAC address, but I want to return it as a string. I am completely confused.
请帮忙。
try {
InetAddress add = InetAddress.getByName("10.123.96.102");
NetworkInterface ni1 = NetworkInterface.getByInetAddress(add);
if (ni1 != null) {
byte[] mac1 = ni1.getHardwareAddress();
if (mac1 != null) {
for (int k = 0; k < mac1.length; k++) {
System.out.format("%02X%s", mac1[k], (k < mac1.length - 1) ? "-" : "");
}
} else {
System.out.println("Address doesn't exist ");
}
System.out.println();
} else {
System.out.println("address is not found.");
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (SocketException e) {
e.printStackTrace();
}
推荐答案
没有标准的文字表示对于Mac地址。您只需将其转换为十六进制并将字节分开以便于阅读。这是我在Unix上使用ifconfig格式的函数,
There is no standard text representation for Mac addresses. You just need to convert it to hex and separate the bytes for readability. Here is the function I use in the format of ifconfig on Unix,
public static String getMacAddress(String ipAddr)
throws UnknownHostException, SocketException {
InetAddress addr = InetAddress.getByName(ipAddr);
NetworkInterface ni = NetworkInterface.getByInetAddress(addr);
if (ni == null)
return null;
byte[] mac = ni.getHardwareAddress();
if (mac == null)
return null;
StringBuilder sb = new StringBuilder(18);
for (byte b : mac) {
if (sb.length() > 0)
sb.append(':');
sb.append(String.format("%02x", b));
}
return sb.toString();
}
您只需将':'更改为' - '。
You just need to change the ':' to '-'.
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