passwordencodebean.java

MD5的加密算法

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package util;
import java.security.MessageDigest;
/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: </p>
* @author unascribed
* @version 1.0
*/
public class PasswordEncodeBean {
  private final static String[] hexDigits = {
        "0", "1", "2", "3", "4", "5", "6", "7",
        "8", "9", "a", "b", "c", "d", "e", "f"};

    /**
     *
     * @param
     * @return 16
     */
    public static String byteArrayToHexString(byte[] b) {
      StringBuffer resultSb = new StringBuffer();
      for (int i = 0; i < b.length; i++) {
        resultSb.append(byteToHexString(b[i]));
      }
      return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
      int n = b;
      if (n < 0)
        n = 256 + n;
      int d1 = n / 16;
      int d2 = n % 16;
      return hexDigits[d1] + hexDigits[d2];
    }
/**
 * 姝ｅ悜MD5鍔犲瘑鏂规硶
 * @param origin
 * @return
 */
    public static String MD5Encode(String origin) {
      String resultString = null;
      try {
        resultString=new String(origin);
        MessageDigest md = MessageDigest.getInstance("MD5");
        resultString=byteArrayToHexString(md.digest(resultString.getBytes()));
      }
      catch (Exception ex) {
      }
      return resultString;
    }

    /**
     * 浣跨敤寮傛垨杩涜