【转】Java获取本机IP/网卡MAC

Java getSystemName/getLocalHost/getHostAddress/getMacAddress

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 test {
 public 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) {
// TODO: use a smart regular expression
 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) {
// TODO: use a smart regular expression
 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;
 }

 public 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();
 }

 }
}

注：本文转自http://www.zhenhua.org/article.asp?id=420