JDK6新特性,JAVA获得机器MAC地址的方法

这个代码包含了以前常见的用Runtime实现的方法，已经使用JDK1.6新特性实现的方法。

1.import java.io.BufferedReader;
2.import java.io.InputStreamReader;
3.import java.net.NetworkInterface;
4.import java.util.Enumeration;
5./**
6. * JDK6新特性,JAVA获得机器MAC地址的方法
7. *
8. * @author 老紫竹(Java世纪网,java2000.net)
9. */
10.publicclass Test {
11.  // 返回一个字节的十六进制字符串
12.  static String hexByte(byte b) {
13.    String s = "000000" + Integer.toHexString(b);
14.    return s.substring(s.length() - 2);
15.  }
16.  publicstaticvoid main(String[] args) throws Exception {
17.    System.out.println("本机器的所有的网卡MAC发下:");
18.    getMacOnWindow();
19.    getMac();
20.  }
21.  /**
22.   * JDK1.6新特性获取网卡MAC地址
23.   */
24.  publicstaticvoid getMac() {
25.    try {
26.      Enumeration<NetworkInterface> el = NetworkInterface.getNetworkInterfaces();
27.      while (el.hasMoreElements()) {
28.        byte[] mac = el.nextElement().getHardwareAddress();
29.        if (mac == null)
30.          continue;
31.        StringBuilder builder = new StringBuilder();
32.        for (byte b : mac) {
33.          builder.append(hexByte(b));
34.          builder.append("-");
35.        }
36.        builder.deleteCharAt(builder.length() - 1);
37.        System.out.println(builder);
38.      }
39.    } catch (Exception exception) {
40.      exception.printStackTrace();
41.    }
42.  }
43.  /**
44.   * 原始的获取网卡MAC地址
45.   */
46.  publicstaticvoid getMacOnWindow() {
47.    try {
48.      String mac = null;
49.      Process process = Runtime.getRuntime().exec("ipconfig /all");
50.      BufferedReader buffer = new BufferedReader(new InputStreamReader(process.getInputStream()));
51.      for (String line = buffer.readLine(); line != null; line = buffer.readLine()) {
52.        int index = line.indexOf("Physical Address");
53.        if (index <= 0) {
54.          continue;
55.        }
56.        mac = line.substring(index + 36);
57.        break;
58.      }
59.      buffer.close();
60.      process.waitFor();
61.      System.out.println(mac);
62.    } catch (Exception exception) {
63.      exception.printStackTrace();
64.    }
65.  }
66.}