TCP协议传输文件夹之压缩

public class ZipClass
{
///  <summary>
/// 所有文件缓存
///  </summary>
List <string> files = new List <string>();

///  <summary>
/// 所有空目录缓存
///  </summary>
List <string> paths = new List <string>();

///  <summary>
/// 压缩目录（包括子目录及所有文件）
///  </summary>
///  <param name="rootPath">要压缩的根目录 </param>
///  <param name="destinationPath">保存路径 </param>
///  <param name="compressLevel">压缩程度，范围0-9，数值越大，压缩程序越高 </param>
public void ZipFileFromDirectory(string rootPath, string destinationPath, int compressLevel)
{
GetAllDirectories(rootPath);

/* while (rootPath.LastIndexOf("\\") + 1 == rootPath.Length)//检查路径是否以"\"结尾
{

rootPath = rootPath.Substring(0, rootPath.Length - 1);//如果是则去掉末尾的"\"

}
*/
//string rootMark = rootPath.Substring(0, rootPath.LastIndexOf("\\") + 1);//得到当前路径的位置，以备压缩时将所压缩内容转变成相对路径。
string rootMark = rootPath + "\\";//得到当前路径的位置，以备压缩时将所压缩内容转变成相对路径。
Crc32 crc = new Crc32();
ZipOutputStream outPutStream = new ZipOutputStream(File.Create(destinationPath));
outPutStream.SetLevel(compressLevel); // 0 - store only to 9 - means best compression
foreach (string file in files)
{
FileStream fileStream = File.OpenRead(file);//打开压缩文件
byte[] buffer = new byte[fileStream.Length];
fileStream.Read(buffer, 0, buffer.Length);
ZipEntry entry = new ZipEntry(file.Replace(rootMark, string.Empty));
entry.DateTime = DateTime.Now;
// set Size and the crc, because the information
// about the size and crc should be stored in the header
// if it is not set it is automatically written in the footer.
// (in this case size == crc == -1 in the header)
// Some ZIP programs have problems with zip files that don't store
// the size and crc in the header.
entry.Size = fileStream.Length;
fileStream.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
outPutStream.PutNextEntry(entry);
outPutStream.Write(buffer, 0, buffer.Length);
}

this.files.Clear();

foreach (string emptyPath in paths)
{
ZipEntry entry = new ZipEntry(emptyPath.Replace(rootMark, string.Empty) + "/");
outPutStream.PutNextEntry(entry);
}

this.paths.Clear();
outPutStream.Finish();
outPutStream.Close();
GC.Collect();
}

///  <summary>
/// 取得目录下所有文件及文件夹，分别存入files及paths
///  </summary>
///  <param name="rootPath">根目录 </param>
private void GetAllDirectories(string rootPath)
{
string[] subPaths = Directory.GetDirectories(rootPath);//得到所有子目录
foreach (string path in subPaths)
{
GetAllDirectories(path);//对每一个字目录做与根目录相同的操作：即找到子目录并将当前目录的文件名存入List
}
string[] files = Directory.GetFiles(rootPath);
foreach (string file in files)
{
this.files.Add(file);//将当前目录中的所有文件全名存入文件List
}
if (subPaths.Length == files.Length && files.Length == 0)//如果是空目录
{
this.paths.Add(rootPath);//记录空目录
}
}

///  <summary>
/// 解压缩文件(压缩文件中含有子目录)
///  </summary>
///  <param name="zipfilepath">待解压缩的文件路径 </param>
///  <param name="unzippath">解压缩到指定目录 </param>
///  <returns>解压后的文件列表 </returns>
public List <string> UnZip(string zipfilepath, string unzippath)
{
//解压出来的文件列表
List <string> unzipFiles = new List <string>();

//检查输出目录是否以“\\”结尾
if (unzippath.EndsWith("\\") == false || unzippath.EndsWith(":\\") == false)
{
unzippath += "\\";
}

ZipInputStream s = new ZipInputStream(File.OpenRead(zipfilepath));
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(unzippath);
string fileName = Path.GetFileName(theEntry.Name);

//生成解压目录【用户解压到硬盘根目录时，不需要创建】
if (!string.IsNullOrEmpty(directoryName))
{
Directory.CreateDirectory(directoryName);
}

if (fileName != String.Empty)
{
//如果文件的压缩后大小为0那么说明这个文件是空的,因此不需要进行读出写入
if (theEntry.CompressedSize == 0)
break;
//解压文件到指定的目录
directoryName = Path.GetDirectoryName(unzippath + theEntry.Name);
//建立下面的目录和子目录
Directory.CreateDirectory(directoryName);

//记录导出的文件
unzipFiles.Add(unzippath + theEntry.Name);

FileStream streamWriter = File.Create(unzippath + theEntry.Name);

int size = 2048;
byte[] data = new byte[2048];
while (true)
{
size = s.Read(data, 0, data.Length);
if (size > 0)
{
streamWriter.Write(data, 0, size);
}
else
{
break;
}
}
streamWriter.Close();
}
}
s.Close();
GC.Collect();
return unzipFiles;
}
}