java获取本地mac总结（摘录整理）

2xqz4g40en

方法一：

import java.net.InetAddress;
import java.io.InputStream;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.text.ParseException;
import java.util.StringTokenizer;
public final class NetworkInfo {
private final static String getMacAddress() throws IOException {
String os = System.getProperty("os.name");
try {
if (os.startsWith("Windows")) {
return windowsParseMacAddress(windowsRunIpConfigCommand());
} else if (os.startsWith("Linux")) {
return linuxParseMacAddress(linuxRunIfConfigCommand());
} else {
throw new IOException("unknown operating system:" + os);
}
} catch (ParseException ex) {
ex.printStackTrace();
throw new IOException(ex.getMessage());
}
}
/*
*   Linux   stuff
*/
private final static String linuxParseMacAddress(String ipConfigResponse) throws ParseException {
String localHost = null;
try {
localHost = InetAddress.getLocalHost().getHostAddress();
} catch (java.net.UnknownHostException ex) {
ex.printStackTrace();
throw new ParseException(ex.getMessage(), 0);
}
StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");
String lastMacAddress = null;
while (tokenizer.hasMoreTokens()) {
String line = tokenizer.nextToken().trim();
boolean containsLocalHost = line.indexOf(localHost) >= 0;
//   see   if   line   contains   IP   address
if (containsLocalHost && lastMacAddress != null) {
return lastMacAddress;
}
//   see   if   line   contains   MAC   address
int macAddressPosition = line.indexOf("HWaddr");
if (macAddressPosition <= 0)
continue;
String macAddressCandidate = line.substring(macAddressPosition + 6).trim();
if (linuxIsMacAddress(macAddressCandidate)) {
lastMacAddress = macAddressCandidate;
continue;
}
}
ParseException ex = new ParseException("cannot read MAC address for " + localHost
+ " from [" + ipConfigResponse + "]", 0);
ex.printStackTrace();
throw ex;
}
private final static boolean linuxIsMacAddress(String macAddressCandidate) {
if (macAddressCandidate.length() != 17){
return false;
}
return true;
}
private final static String linuxRunIfConfigCommand() throws IOException {
Process p = Runtime.getRuntime().exec("ifconfig");
InputStream stdoutStream = new BufferedInputStream(p.getInputStream());
StringBuffer buffer = new StringBuffer();
for (;;) {
int c = stdoutStream.read();
if (c == -1)
break;
buffer.append((char) c);
}
String outputText = buffer.toString();
stdoutStream.close();
return outputText;
}
/*
*   Windows   stuff
*/
private final static String windowsParseMacAddress(String ipConfigResponse)
throws ParseException {
String localHost = null;
try {
localHost = InetAddress.getLocalHost().getHostAddress();
} catch (java.net.UnknownHostException ex) {
ex.printStackTrace();
throw new ParseException(ex.getMessage(), 0);
}
StringTokenizer tokenizer = new StringTokenizer(ipConfigResponse, "\n");
String lastMacAddress = null;
while (tokenizer.hasMoreTokens()) {
String line = tokenizer.nextToken().trim();
//   see   if   line   contains   IP   address
if (line.endsWith(localHost) && lastMacAddress != null) {
return lastMacAddress;
}
//   see   if   line   contains   MAC   address
int macAddressPosition = line.indexOf(":");
if (macAddressPosition <= 0)
continue;
String macAddressCandidate = line.substring(macAddressPosition + 1).trim();
if (windowsIsMacAddress(macAddressCandidate)) {
lastMacAddress = macAddressCandidate;
continue;
}
}
ParseException ex = new ParseException("cannot read MAC address from ["
+ ipConfigResponse + "]", 0);
ex.printStackTrace();
throw ex;
}
private final static boolean windowsIsMacAddress(String macAddressCandidate) {
if (macAddressCandidate.length() != 17){
return false;
}
return true;
}
private final static String windowsRunIpConfigCommand() throws IOException {
Process p = Runtime.getRuntime().exec("ipconfig /all ");
InputStream stdoutStream = new BufferedInputStream(p.getInputStream());
StringBuffer buffer = new StringBuffer();
for (;;) {
int c = stdoutStream.read();
if (c == -1)
break;
buffer.append((char) c);
}
String outputText = buffer.toString();
stdoutStream.close();
return outputText;
}
/*
*   Main
*/
public final static void main(String[] args) {
try {
System.out.println("Network infos");
System.out.println("Operating System:" + System.getProperty("os.name"));
System.out.println("IP/Localhost:" + InetAddress.getLocalHost().getHostAddress());
System.out.println("MAC Address:" + getMacAddress());
} catch (Throwable t) {
t.printStackTrace();
}
}
}

方法二：
在Unix/Linux 下通常只有root 用户才有执行ifconfig 命令的权限， 第一种方法中用调用ifconfig 命令的方法获取硬件地址可靠性不好， 普通用户无法正确获取硬件地址，该方法通过纯java的方式很好地解决了此问题

import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
public class MyMac {
public static void main(String[] args) {
try {
//枚举所有网络接口设备
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
//循环处理每一个网络接口设备
while (interfaces.hasMoreElements()) {
NetworkInterface face = (NetworkInterface) interfaces.nextElement();
//环回设备（lo）设备不处理
if (!face.getName().equals("lo")) {
//显示当前网络接口设备显示名称
System.out.println("网卡显示名称:" + face.getDisplayName());
//显示当前设备内部名称
System.out.println(" 网卡设备名称:" + face.getName());
// 获取硬件地址
byte[] mac = face.getHardwareAddress();
System.out.println(" 硬件地址（MAC）:" + bytes2mac(mac));
}
}
} catch (SocketException se) {
System.err.println("错误：" + se.getMessage());
}
}
private static String bytes2mac(byte[] bytes) {
//MAC 地址应为6 字节
if (bytes.length != 6) {
System.err.println("MAC 地址数据有错！ ");
return null;
}
StringBuffer macString = new StringBuffer();
byte currentByte;
for (int i = 0; i < bytes.length; i++) {
//与11110000 作按位与运算以便读取当前字节高4 位
currentByte = (byte) ((bytes & 240) >> 4);
macString.append(Integer.toHexString(currentByte));
//与00001111 作按位与运算以便读取当前字节低4 位
currentByte = (byte) ((bytes & 15));
macString.append(Integer.toHexString(currentByte));
//追加字节分隔符“-”
macString.append("-");
}
//删除多加的一个“-”
macString.delete(macString.length() - 1, macString.length());
//统一转换成大写形式后返回
return macString.toString().toUpperCase();
}
}