java获取mac地址

由于命令行窗口的默认编码方式为GBK，为了简单起见，将java代码的编码方式设置为GBK

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;

public class TestMac
{
      public static void main(String[] args) {
        System.out.println("Operation System=" + getOsName());
        System.out.println("Mac Address=" + getMACAddress());
        System.out.println("get mac by ip :"+getMACAddress("222.204.219.184"));
        System.out.println("get mac by ip :"+getMACAddress("119.75.218.77"));
     }

    public static String getOsName() {
        String os = "";
        os = System.getProperty("os.name");
        return os;
    }
    
    public static String getMACAddress() {
        String address = "";
        String os = getOsName();
        if (os.startsWith("Windows")) {
            try {
                String command = "cmd.exe /c ipconfig /all";
                Process p = Runtime.getRuntime().exec(command);
                BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream(),"GBK"));
                String line;
                while ((line = br.readLine()) != null) {
                	System.out.println(line);
                	String str =new String("物理地址"); 
                    if (line.indexOf(str) > 0) {
                        int index = line.indexOf(":");
                        index += 2;
                        address = line.substring(index);
                        break;
                    }
                }
                br.close();
                return address.trim();
            } catch (IOException e) {
            }
        } else if (os.startsWith("Linux")) {
            String command = "/bin/sh -c ifconfig -a";
            Process p;
            try {
                p = Runtime.getRuntime().exec(command);
                BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
                String line;
                while ((line = br.readLine()) != null) {
                    if (line.indexOf("HWaddr") > 0) {
                        int index = line.indexOf("HWaddr") + "HWaddr".length();
                        address = line.substring(index);
                        break;
                    }
                }
                br.close();
            } catch (IOException e) {
            }
        }
        address = address.trim();
        return address;
    }


    public static String getMACAddress(String ipAddress) { 
		String str = "", strMAC = "", macAddress = ""; 
		try { 
			Process pp = Runtime.getRuntime().exec("nbtstat -a " + ipAddress); 
			InputStreamReader ir = new InputStreamReader(pp.getInputStream()); 
			LineNumberReader input = new LineNumberReader(ir); 
			for (int i = 1; i < 100; i++) { 
				str = input.readLine(); 
				if (str != null) { 
					if (str.indexOf("MAC 地址") > 1) { 
						strMAC = str.substring(str.indexOf("MAC Address") + 14, 
						str.length()); 
						break; 
					} 
				} 
			} 
		} catch (IOException ex) { 
			return "Can't Get MAC Address!"; 
		} 
		if (strMAC.length() < 17) { 
			return "Error!"; 
		} 
		
		macAddress = strMAC.substring(0, 2) + ":" + strMAC.substring(3, 5) 
		+ ":" + strMAC.substring(6, 8) + ":" + strMAC.substring(9, 11) 
		+ ":" + strMAC.substring(12, 14) + ":" 
		+ strMAC.substring(15, 17); 
		return macAddress; 
	} 
} 

运行结果：

Mac Address=8C-A9-82-32-BA-F5
get mac by ip :60:EB:69:ED:47:57
get mac by ip :Error!