UnsignedByte[] 与 sting 转换

    private static final String ENCODE_CHARACTER_SET_GBK = "GBK";
    private static final String ENCODE_CHARACTER_SET_UTF8 = "UTF-8";

    /**
     * String 转 UnsignedByte[]
     * @param fieldName
     * @return
     * @throws Exception
     */
    public static UnsignedByte[] getUnsignedByteValue(String fieldName)
            throws Exception
    {
        UnsignedByte[] ubArray = null;
        try
        {
            if (null != fieldName && !"".equals(fieldName))
            {
                byte[] chinaByte = fieldName.getBytes(ENCODE_CHARACTER_SET_GBK);
                ubArray = new UnsignedByte[chinaByte.length];

                for (int i = 0; i < ubArray.length; i++)
                {
                    if (chinaByte[i] < 0)
                    {
                        ubArray[i] = new UnsignedByte(chinaByte[i] + 256);
                    }
                    else
                    {
                        ubArray[i] = new UnsignedByte(chinaByte[i]);
                    }
                }
            }
            else
            {
                return ubArray;
                //ubArray = new UnsignedByte[] { new UnsignedByte(0) };            }
        }
        catch (Exception ex)
        {
            throw ex;
        }

        return ubArray;
    }

    /**
     * UnsignedByte[] 转 String
     * @param ubArray
     * @return
     * @throws Exception
     */
    public static String getStringValue(UnsignedByte[] ubArray)
            throws Exception
    {
        String strValue = "";
        try
        {
            if (null != ubArray)
            {
                byte[] chinaByte = new byte[ubArray.length];

                for (int i = 0; i < ubArray.length; i++)
                {
                    chinaByte[i] = ubArray[i].byteValue();
                }
                
                strValue = new String(chinaByte, ENCODE_CHARACTER_SET_GBK);
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }

        return strValue;
    }