Java獲取網卡的mac地址

為了項目的安全，有時候需要得到電腦的唯一碼，比如：網卡的mac地址。和大家分享一下，下面是項目中用到的工具類：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.NetworkInterface;

public class MacAddressAPI {
/**
* 獲取當前操作系統名稱. return 操作系統名稱 例如:windows xp,linux 等.
*/
public static String getOSName() {
return System.getProperty("os.name").toLowerCase();
}

/**
* 獲取unix網卡的mac地址. 非windows的系統默認調用本方法獲取. 如果有特殊系統請繼續擴充新的取mac地址方法.
*
* @return mac地址
*/
public static String getUnixMACAddress() {
String mac = null;
BufferedReader bufferedReader = null;
Process process = null;
try {
// linux下的命令，一般取eth0作為本地主網卡
process = Runtime.getRuntime().exec("ifconfig eth0");
// 顯示信息中包含有mac地址信息
bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line = null;
int index = -1;
while ((line = bufferedReader.readLine()) != null) {
// 尋找標示字符串[hwaddr]
index = line.toLowerCase().indexOf("hwaddr");
if (index >= 0) {// 找到了
// 取出mac地址並去除2邊空格
mac = line.substring(index + "hwaddr".length() + 1).trim();
break;
}
}
}
catch (IOException e) {
System.out.println("unix/linux方式未獲取到網卡地址");
}
finally {
try {
if (bufferedReader != null) {
bufferedReader.close();
}
}
catch (IOException e1) {
e1.printStackTrace();
}
bufferedReader = null;
process = null;
}
return mac;
}

/**
* 獲取widnows網卡的mac地址.
*
* @return mac地址
*/
public static String getWindowsMACAddress() {
String mac = null;
BufferedReader bufferedReader = null;
Process process = null;
try {
// windows下的命令，顯示信息中包含有mac地址信息
process = Runtime.getRuntime().exec("ipconfig /all");
bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line = null;
int index = -1;
while ((line = bufferedReader.readLine()) != null) {
// 尋找標示字符串[physical
index = line.toLowerCase().indexOf("physical address");
if (index >= 0) {// 找到了
index = line.indexOf(":");// 尋找":"的位置
if (index >= 0) {
// 取出mac地址並去除2邊空格
mac = line.substring(index + 1).trim();
}
break;
}
}
}
catch (IOException e) {
System.out.println("widnows方式未獲取到網卡地址");
}
finally {
try {
if (bufferedReader != null) {
bufferedReader.close();
}
}
catch (IOException e1) {
e1.printStackTrace();
}
bufferedReader = null;
process = null;
}
return mac;
}

/**
* windows 7 專用 獲取MAC地址
*
* @return
* @throws Exception
*/
public static String getWindows7MACAddress() {
StringBuffer sb = new StringBuffer();
try {
// 獲取本地IP對象
InetAddress ia = InetAddress.getLocalHost();
// 獲得網絡接口對象（即網卡），並得到mac地址，mac地址存在於一個byte數組中。
byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress();
// 下面代碼是把mac地址拼裝成String
for (int i = 0; i < mac.length; i++) {
// mac[i] & 0xFF 是為了把byte轉化為正整數
String s = Integer.toHexString(mac[i] & 0xFF);
sb.append(s.length() == 1 ? 0 + s : s);
}
}
catch (Exception ex) {
System.out.println("windows 7方式未獲取到網卡地址");
}
return sb.toString();
}

/**
* 獲取MAC地址
*
* @param argc
* 運行參數.
* @throws Exception
*/
public static String getMACAddress() {
// windows
String mac = getWindowsMACAddress();
// windows7
if (isNull(mac)) {
mac = getWindows7MACAddress();
}
// unix
if (isNull(mac)) {
mac = getUnixMACAddress();
}

if (!isNull(mac)) {
mac = mac.replace("-", "");
}
else {
mac = "ABCDEFGHIJ";
}
return mac.toLowerCase();
}

public static boolean isNull(Object strData) {
if (strData == null || String.valueOf(strData).trim().equals("")) {
return true;
}
return false;
}

public static void main(String[] args) {
System.out.println(getWindows7MACAddress());
}

}