public class Compression
{
/// <summary>
/// 对字符串进行压缩
/// </summary>
/// <param name="str">待压缩的字符串</param>
/// <returns>压缩后的字符串</returns>
public static string CompressString(string str)
{
string compressString = "";
byte[] compressBeforeByte = Encoding.GetEncoding("UTF-8").GetBytes(str);
byte[] compressAfterByte=Compress(compressBeforeByte);
//compressString = Encoding.GetEncoding("UTF-8").GetString(compressAfterByte);
compressString = Convert.ToBase64String(compressAfterByte);
return compressString;
}
/// <summary>
/// 对字符串进行解压缩
/// </summary>
/// <param name="str">待解压缩的字符串</param>
/// <returns>解压缩后的字符串</returns>
public static string DecompressString(string str)
{
string compressString = "";
//byte[] compressBeforeByte = Encoding.GetEncoding("UTF-8").GetBytes(str);
byte[] compressBeforeByte = Convert.FromBase64String(str);
byte[] compressAfterByte = Decompress(compressBeforeByte);
compressString = Encoding.GetEncoding("UTF-8").GetString(compressAfterByte);
return compressString;
}
/// <summary>
/// 对文件进行压缩
/// </summary>
/// <param name="sourceFile">待压缩的文件名</param>
/// <param name="destinationFile">压缩后的文件名</param>
public static void CompressFile(string sourceFile, string destinationFile)
{
throw new Exception
("The method or operation is not implemented."); }
/// <summary>
/// 对文件进行解压缩
/// </summary>
/// <param name="sourceFile">待解压缩的文件名</param>
/// <param name="destinationFile">解压缩后的文件名</param>
/// <returns></returns>
public static void DecompressFile(string sourceFile, string destinationFile)
{
throw new Exception
("The method or operation is not implemented."); }
/// <summary>
/// 对byte数组进行压缩
/// </summary>
/// <param name="data">待压缩的byte数组</param>
/// <returns>压缩后的byte数组</returns>
public static byte[] Compress(byte[] data)
{
try
{
MemoryStream ms
= new MemoryStream
(); GZipStream zip
= new GZipStream
(ms, CompressionMode
.Compress,
true); zip.Write(data, 0, data.Length);
zip.Close();
byte[] buffer
= new byte[ms
.Length]; ms.Position=0;
ms.Read(buffer, 0, buffer.Length);
ms.Close();
return buffer;
}
catch (Exception e)
{
throw new Exception
(e
.Message); }
}
public static byte[] Decompress(byte[] data)
{
try
{
MemoryStream ms
= new MemoryStream
(data
); GZipStream zip
= new GZipStream
(ms, CompressionMode
.Decompress,
true); MemoryStream msreader
= new MemoryStream
(); byte[] buffer
= new byte[0x1000
]; while (true)
{
int reader = zip.Read(buffer, 0, buffer.Length);
if (reader <= 0)
{
break;
}
msreader.Write(buffer, 0, reader);
}
zip.Close();
ms.Close();
msreader.Position = 0;
buffer = msreader.ToArray();
msreader.Close();
return buffer;
}
catch (Exception e)
{
throw new Exception
(e
.Message); }
}
}
//csharp/8278