src/main/java/cn/pzhu/pserson/util/MD5Util.java

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package cn.pzhu.pserson.util;


import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {

  /**
   * Encodes a string 2 MD5
   *
   * @param str String to encode
   * @return Encoded String
   * @throws NoSuchAlgorithmException
   */
  public static String crypt(String str) {
    if (str == null || str.length() == 0) {
      throw new IllegalArgumentException("String to encript cannot be null or zero length");
    }
    StringBuffer hexString = new StringBuffer();
    try {
      MessageDigest md = MessageDigest.getInstance("MD5");
      md.update(str.getBytes());
      byte[] hash = md.digest();
      for (int i = 0; i < hash.length; i++) {
        if ((0xff & hash[i]) < 0x10) {
          hexString.append("0" + Integer.toHexString((0xFF & hash[i])));
        } else {
          hexString.append(Integer.toHexString(0xFF & hash[i]));
        }
      }
    } catch (NoSuchAlgorithmException e) {
      e.printStackTrace();
    }
    return hexString.toString();
  }

}