为了项目的安全,有时候需要得到电脑的唯一码,比如:网卡的mac地址。和大家分享一下,下面是项目中用到的工具类:
/** * 获取Mac地址 * @return */ public String getMAC() { try { InetAddress ia = InetAddress.getLocalHost(); byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress(); // System.out.println("mac数组长度:"+mac.length); StringBuffer sb = new StringBuffer(""); for(int i=0; i < mac.length; i++) { if(i!=0) { sb.append("-"); } //字节转换为整数 int temp = mac[i]&0xff; String str = Integer.toHexString(temp); if(str.length()==1) { sb.append("0"+str); }else { sb.append(str); } } String macStr = sb.toString().toUpperCase(); return macStr; } catch (Exception e) { e.printStackTrace(); } return null; }
当然除了上面的简单方法还有如下网友提供的方法可以尝试
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.InetAddress; import java.net.NetworkInterface; public class MacAddressAPI { /** * 获取当前操作系统名称. return 操作系统名称 例如:windows xp,linux 等. */ public static String getOSName() { return System.getProperty("os.name").toLowerCase(); } /** * 获取unix网卡的mac地址. 非windows的系统默认调用本方法获取. 如果有特殊系统请继续扩充新的取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作为本地主网卡 process = Runtime.getRuntime().exec("ifconfig eth0"); // 显示信息中包含有mac地址信息 bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream())); String line = null; int index = -1; while ((line = bufferedReader.readLine()) != null) { // 寻找标示字符串[hwaddr] index = line.toLowerCase().indexOf("hwaddr"); if (index >= 0) {// 找到了 // 取出mac地址并去除2边空格 mac = line.substring(index + "hwaddr".length() + 1).trim(); break; } } } catch (IOException e) { System.out.println("unix/linux方式未获取到网卡地址"); } finally { try { if (bufferedReader != null) { bufferedReader.close(); } } catch (IOException e1) { e1.printStackTrace(); } bufferedReader = null; process = null; } return mac; } /** * 获取widnows网卡的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,显示信息中包含有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) { // 寻找标示字符串[physical index = line.toLowerCase().indexOf("physical address"); if (index >= 0) {// 找到了 index = line.indexOf(":");// 寻找":"的位置 if (index >= 0) { // 取出mac地址并去除2边空格 mac = line.substring(index + 1).trim(); } break; } } } catch (IOException e) { System.out.println("widnows方式未获取到网卡地址"); } finally { try { if (bufferedReader != null) { bufferedReader.close(); } } catch (IOException e1) { e1.printStackTrace(); } bufferedReader = null; process = null; } return mac; } /** * windows 7 专用 获取MAC地址 * @return * @throws Exception */ public static String getWindows7MACAddress() { StringBuffer sb = new StringBuffer(); try { // 获取本地IP对象 InetAddress ia = InetAddress.getLocalHost(); // 获得网络接口对象(即网卡),并得到mac地址,mac地址存在于一个byte数组中。 byte[] mac = NetworkInterface.getByInetAddress(ia).getHardwareAddress(); // 下面代码是把mac地址拼装成String for (int i = 0; i < mac.length; i++) { // mac[i] & 0xFF 是为了把byte转化为正整数 String s = Integer.toHexString(mac[i] & 0xFF); sb.append(s.length() == 1 ? 0 + s : s); } } catch (Exception ex) { System.out.println("windows 7方式未获取到网卡地址"); } return sb.toString(); } /** * 获取MAC地址 * @param argc 运行参数. * @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; } 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("当前操作系统:"+getOSName()); System.out.println(getWindows7MACAddress()); System.out.println(getMACAddress()); System.out.println(getWindowsMACAddress()); System.out.println(getUnixMACAddress()); } }