通过java语言实现MD5加密

通过java语言实现MD5加密
public static String getMd5(String str) {
   try {
      MessageDigest md5 = MessageDigest.getInstance("MD5");
      byte[] bytes = md5.digest(str.getBytes());
      String temp, result = "";
      for (byte b : bytes) {
         temp = Integer.toHexString(b & 0xff);
         if (temp.length() == 1) {
            temp = "0" + temp;
         }
         result = result + temp;
      }
      return result;
   } catch (Exception e) {
      e.printStackTrace();
   }
   return "";
}