利用SharpZipLib对字符串进行压缩和解压缩

添加对ICSharpCode.SharpZipLib的引用。

using ICSharpCode.SharpZipLib.BZip2;



/// <summary>

        /// 压缩

        /// </summary>

        /// <param name="text"></param>

        /// <returns></returns>

        private static string Compress(string text)

        {

            if (text.IsNullOrEmpty())

            {

                return string.Empty;

            }

            using (MemoryStream mZipStreamIn = new MemoryStream(Encoding.UTF8.GetBytes(text)))

            {

                using (MemoryStream mZipStreamOut = new MemoryStream())

                {

                    BZip2.Compress(mZipStreamIn, mZipStreamOut, true, 5);

                    return Convert.ToBase64String(mZipStreamOut.ToArray());

                }

            }

        }

/// <summary>

/// 解压缩

/// </summary>

/// <param name="zipText"></param>

/// <returns></returns>

private static string DeCompress(string zipText)

{

    if (zipText.IsNullOrEmpty())

    {

        return string.Empty;

    }

    using (MemoryStream mZipStreamIn = new MemoryStream(Convert.FromBase64String(zipText)))

    {

        using (MemoryStream mZipStreamOut = new MemoryStream())

        {

            BZip2.Decompress(mZipStreamIn, mZipStreamOut, false);

            return Encoding.UTF8.GetString(mZipStreamOut.ToArray());

        }

    }

}

对字符串的压缩与压缩文件一样，越大效果越明显，对很小的文件或者字符串进行压缩，得到的结果往往比压缩之前还要大