PHPdes加密输入如何才能和JAVA的des输出一至呢

    /**
     * 传输的关键数据加密
     * @param keyData 需加密值
     * @param timestamp  时间戳
     * @param dataSecret  密钥
     * @return String 加密数据
     */
    public static String encryptKeyData(String keyData, Long timestamp, String dataSecret) {

        DateFormat df = new SimpleDateFormat(Constants.DATE_TIME_FORMAT);
        df.setTimeZone(TimeZone.getTimeZone(Constants.DATE_TIMEZONE));
        keyData = df.format(new Date(timestamp)) + "aop" + keyData;
        return desEncryptToBase64(keyData, dataSecret.getBytes());
    }

    function encrypt($input) 
    {        
        $size = mcrypt_get_block_size('des', 'ecb');          
        $input = $this->pkcs5_pad($input, $size);          
        $key = $this->key;         
        $td = mcrypt_module_open('des', '', 'ecb', '');       
        $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);      
        @mcrypt_generic_init($td, $key, $iv);         
        $data = mcrypt_generic($td, $input);          
        mcrypt_generic_deinit($td);      
        mcrypt_module_close($td);         
        $data = base64_encode($data);         
        return $data;     
    } 
    function pkcs5_pad ($text, $blocksize) {          
        $pad = $blocksize - (strlen($text) % $blocksize);         
        return $text . str_repeat(chr($pad), $pad);   
    }