using System;
using System.IO;
using System.IO.Compression;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Text;
using ICSharpCode.SharpZipLib.BZip2;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.GZip;
namespace CompressClass
{
public static class CompressDeCompress
{
//压缩SharpZip
public static string SharpZipCompress(string uncompressedString)
{
byte[] bytData = System.Text.Encoding.Unicode.GetBytes(uncompressedString);
MemoryStream ms = new MemoryStream();
Stream s = new BZip2OutputStream(ms);
s.Write(bytData, 0, bytData.Length);
s.Close();
byte[] compressedData = (byte[])ms.ToArray();
return System.Convert.ToBase64String(compressedData, 0, compressedData.Length);
}
//解压SharpZip
public static string SharpZipDeCompress(string compressedString)
{
System.Text.StringBuilder uncompressedString = new System.Text.StringBuilder();
int totalLength = 0;
byte[] bytInput = System.Convert.FromBase64String(compressedString); ;
byte[] writeData = new byte[4096];
Stream s2 = new BZip2InputStream(new MemoryStream(bytInput));
while (true)
{
int size = s2.Read(writeData, 0, writeData.Length);
if (size > 0)
{
totalLength += size;
uncompressedString.Append(System.Text.Encoding.Unicode.GetString(writeData, 0, size));
}
else
{
break;
}
}
s2.Close();
return uncompressedString.ToString();
}
//压缩Gzip
public static string GzipCompress(string uncompressedString)
{
byte[] bytData = System.Text.Encoding.Unicode.GetBytes(uncompressedString);
MemoryStream ms = new MemoryStream();
Stream s = new GZipStream(ms, CompressionMode.Compress);
s.Write(bytData, 0, bytData.Length);
s.Close();
byte[] compressedData = (byte[])ms.ToArray();
return System.Convert.ToBase64String(compressedData, 0, compressedData.Length);
}
//解压Gzip
public static string GzipDeCompress(string compressedString)
{
System.Text.StringBuilder uncompressedString = new System.Text.StringBuilder();
int totalLength = 0;
byte[] bytInput = System.Convert.FromBase64String(compressedString); ;
byte[] writeData = new byte[4096];
Stream s2 = new GZipStream(new MemoryStream(bytInput), CompressionMode.Decompress);
while (true)
{
int size = s2.Read(writeData, 0, writeData.Length);
if (size > 0)
{
totalLength += size;
uncompressedString.Append(System.Text.Encoding.Unicode.GetString(writeData, 0, size));
}
else
{
break;
}
}
s2.Close();
return uncompressedString.ToString();
}
}
}
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