c#利用zlib.net對文件進行deflate流壓縮（和java程序壓縮生成一樣）

C#自帶DeflateStream，生成后的文件和javat生成的不一樣，搜索了一下，找到國外一篇文章：

http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/65537603-d7db-4e66-b5e6-d08275a4e4c8/

也是同樣的問題，其中的一個回復是：

The problem is that DeflateStream in c# does not use the same compression algorithm than Deflater in java(and probably objective C).

Instead, try to use the zlib.net library: http://www.componentace.com/zlib_.NET.htm

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下載引用zlib.net，調用CompressFile()方法，問題解決。

 public static void CopyStream(System.IO.Stream input, System.IO.Stream output)
        {
            byte[] buffer = new byte[2000];
            int len;
            while ((len = input.Read(buffer, 0, 2000)) > 0)
            {
                output.Write(buffer, 0, len);
            }
            output.Flush();
        }

        private void compressFile(string inFile, string outFile)
        {
           
            System.IO.FileStream outFileStream = new System.IO.FileStream(outFile, System.IO.FileMode.Create);
            zlib.ZOutputStream outZStream = new zlib.ZOutputStream(outFileStream, zlib.zlibConst.Z_DEFAULT_COMPRESSION);
            System.IO.FileStream inFileStream = new System.IO.FileStream(inFile, System.IO.FileMode.Open);
            try
            {
                CopyStream(inFileStream, outZStream);
            }
            finally
            {
                outZStream.Close();
                outFileStream.Close();
                inFileStream.Close();
            }
        }
        private void decompressFile(string inFile, string outFile)
        {
            System.IO.FileStream outFileStream = new System.IO.FileStream(outFile, System.IO.FileMode.Create);
            zlib.ZOutputStream outZStream = new zlib.ZOutputStream(outFileStream);
            System.IO.FileStream inFileStream = new System.IO.FileStream(inFile, System.IO.FileMode.Open);
            try
            {
                CopyStream(inFileStream, outZStream);
            }
            finally
            {
                outZStream.Close();
                outFileStream.Close();
                inFileStream.Close();
            }
        }