jsp和java代码如下：
JAVA:
import java.applet.Applet;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
public class MACAddressApplet extends Applet
{
private static final long serialVersionUID = 6866002748735327341L;
public static String sep = ":";
public static String format = "%02X";
/**
* getMacAddress - return the first mac address found
* separator - byte seperator default ":"
* format - byte formatter default "%02X"
*
* @param ni - the network interface
* @return String - the mac address as a string
* @throws SocketException - pass it on
*/
public static String macToString( NetworkInterface ni ) throws SocketException
{
return macToString( ni, MACAddressApplet.sep, MACAddressApplet.format );
}
/**
* getMacAddress - return the first mac address found
*
* @param ni - the network interface
* @param separator - byte seperator default ":"
* @param format - byte formatter default "%02X"
* @return String - the mac address as a string
* @throws SocketException - pass it on
*/
public static String macToString( NetworkInterface ni, String separator, String format ) throws SocketException
{
byte mac [] = ni.getHardwareAddress();
if( mac != null ) {
StringBuffer macAddress = new StringBuffer( "" );
String sep = "";
for( byte o : mac ) {
macAddress.append( sep ).append( String.format( format, o ) );
sep = separator;
}
return macAddress.toString();
}
return null;
}
/**
* getMacAddress - return the first mac address found
*
* @return the mac address or undefined
*/
public static String getMacAddress()
{
try {
Enumeration<NetworkInterface> nis = NetworkInterface.getNetworkInterfaces();
// not all interface will have a mace address for instance loopback on windows
while( nis.hasMoreElements() ) {
String mac = macToString( nis.nextElement() );
if( mac != null )
return mac;
}
} catch( SocketException ex ) {
System.err.println( "SocketException:: " + ex.getMessage() );
ex.printStackTrace();
} catch( Exception ex ) {
System.err.println( "Exception:: " + ex.getMessage() );