MD5加密算法

import java.security.MessageDigest;
public class Dxt_SMSMD5{
  public final static String MD5(String s) {
    char hexdigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd','e', 'f'};

    try {
      byte[] strTemp = s.getBytes();
      MessageDigest mdTemp = MessageDigest.getInstance("MD5");
      mdTemp.update(strTemp);
      byte[] md = mdTemp.digest();
      int j = md.length;
      char str[] = new char[j * 2];
      int k = 0;
      for (int i = 0; i < j; i++) {
        byte byte0 = md[i];
        str[k++] = hexdigits[byte0 >>> 4 & 0xf];
        str[k++] = hexdigits[byte0 & 0xf];
      }
      return new String(str);
    }
    catch (Exception e) {
      return null;
    }
  }

  public static void main(String[] args) {
	//MD5_Test aa = new MD5_Test();
    System.out.print(Dxt_SMSMD5.MD5("123456"));
  }
}

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