import java.net.InetAddress;
import java.security.SecureRandom;

public class SequenceUUID
{

??? public SequenceUUID()
??? {
??? }

??? public String getUUID()
??? {
??????? long l = System.currentTimeMillis();
??????? int i = (int)l & -1;
??????? if(midValue == null)
??????????? try
??????????? {
??????????????? InetAddress inetaddress = InetAddress.getLocalHost();
??????????????? byte abyte0[] = inetaddress.getAddress();
??????????????? String s = hexFormat(getInt(abyte0), ;
??????????????? String s1 = hexFormat(System.identityHashCode(this), ;
??????????????? midValue = s + s1;
??????????? }
??????????? catch(Exception exception)
??????????? {
??????????????? exception.printStackTrace();
??????????? }
??????? SecureRandom securerandom = new SecureRandom();
??????? int j = securerandom.nextInt();
??????? return hexFormat(i, + midValue + hexFormat(j, ;
??? }

??? private static int getInt(byte abyte0[])
??? {
??????? int i = 0;
??????? int j = 24;
??????? for(int k = 0; j >= 0; k++)
??????? {
??????????? int l = abyte0[k] & 255;
??????????? i += l << j;
??????????? j -= 8;
??????? }

??????? return i;
??? }

??? private static String hexFormat(int i, int j)
??? {
??????? String s = Integer.toHexString(i);
??????? return padHex(s, j) + s;
??? }

??? private static String padHex(String s, int i)
??? {
??????? StringBuffer stringbuffer = new StringBuffer();
??????? if(s.length() < i)
??????? {
??????????? for(int j = 0; j < i - s.length(); j++)
??????????????? stringbuffer.append('0');

??????? }
??????? return stringbuffer.toString();
??? }

??? protected static String midValue = null;

}

獲取字符串ID類