C#下使用SevenZipSharp壓縮解壓文本.doc

C#下使用SevenZipSharp壓縮解壓文本2012-1-30網(wǎng)上搜來的大部分文檔都是使用7zip對文件進(jìn)行壓縮解壓的例子，自己需要在內(nèi)存中對字符串進(jìn)行壓縮解壓操作。經(jīng)過摸索實(shí)踐，終于搞定。SevenZipSharp相關(guān)文檔下載地址：/releases/view/512541. 解決方案中添加引用：SevenZipSharp.dll2. 復(fù)制粘貼兩個(gè)dll文件：7z.dll 7z64.dll，并將屬性“復(fù)制到輸出目錄”修改為“如果較新則復(fù)制”。3. 工具類實(shí)現(xiàn)代碼如下：using System;using System.Text;using SevenZip;using System.IO;namespace util class SevenZipUtil / / 壓縮字符串 / / 源字符串 / 壓縮后字節(jié)數(shù)組 public static byte Compress(string input) byte compressed = null; SevenZipCompressor compressor = new SevenZipCompressor(); compressor.CompressionMethod = CompressionMethod.Ppmd; compressor.CompressionLevel = CompressionLevel.High; using (MemoryStream msin = GetUTF8MemorySteam(input) using (MemoryStream msout = new MemoryStream() compressor.CompressStream(msin, msout); msout.Position = 0; compressed = new bytemsout.Length; msout.Read(compressed, 0, compressed.Length); /* Console.WriteLine(compressed: ); foreach (byte b in compressed) Console.Write(b); Console.Write( ); Console.WriteLine(); */ return compressed; / / 獲取輸入字符串的UTF8編碼 / / 源字符串 / 內(nèi)存數(shù)據(jù)流 private static MemoryStream GetUTF8MemorySteam(string input) MemoryStream ms = new MemoryStream(); byte bytes = Encoding.UTF8.GetBytes(input); ms.Write(bytes, 0, bytes.Length); return ms; / / 解壓字節(jié)數(shù)組 / / 源字節(jié)數(shù)組 / 解壓后字符串 public static string Decompress(byte input) /* Console.WriteLine(input:); foreach (byte b in input) Console.Write(b); Console.Write( ); Console.WriteLine(); */ byte uncompressedbuffer = null; using (MemoryStream msin = new MemoryStream() msin.Write(input, 0, input.Length); uncompressedbuffer = new byteinput.Length; msin.Position = 0; using (SevenZipExtractor extractor = new SevenZipExtractor(msin) using (MemoryStream msout = new MemoryStream() extractor.ExtractFile(0, msout); msout.Position = 0; uncompressedbuffer = new bytemsout.Length; msout.Read(uncompressedbuffer,