/// <summary>
/// 压缩枚举
/// </summary>
public enum ZipEnum
{
//压缩时间长，压缩率高
BZIP,
//压缩效率高，压缩率低
GZIP
}

#region 制作压缩包（单个文件压缩）
/// <summary>
/// 制作压缩包（单个文件压缩）
/// </summary>
/// <param name="sourceFileName">原文件</param>
/// <param name="zipFileName">压缩文件</param>
/// <param name="zipEnum">压缩算法枚举</param>
/// <returns>压缩成功标志</returns>
public static bool ZipFile(string srcFileName, string zipFileName, ZipEnum zipEnum)
{
bool flag = true;
try
{
switch (zipEnum)
{
case ZipEnum.BZIP:
FileStream inStream = File.OpenRead(srcFileName);
FileStream outStream = File.Open(zipFileName, FileMode.Create);
//参数true表示压缩完成后，inStream和outStream连接都释放
BZip.Compress(inStream, outStream, true, );
inStream.Close();
outStream.Close();
break;
case ZipEnum.GZIP:
FileStream srcFile = File.OpenRead(srcFileName);
GZipOutputStream zipFile = newGZipOutputStream(File.Open(zipFileName, FileMode.Create));
byte[] fileData = new byte[srcFile.Length];
srcFile.Read(fileData, , (int)srcFile.Length);
zipFile.Write(fileData, , fileData.Length);
srcFile.Close();
zipFile.Close();
break;
default: break;
}
}
catch
{
flag = false;
}
return flag;
}

#region 解压缩包（单个文件解压缩）
/// <summary>
/// 解压缩包（单个文件解压缩）
/// </summary>
/// <param name="zipFileName">压缩文件</param>
/// <param name="unzipFileName">解压缩文件</param>
/// <param name="zipEnum">压缩算法枚举</param>
/// <returns>压缩成功标志</returns>
public static bool UnZipFile(string zipFileName, stringunzipFileName, ZipEnum zipEnum)
{
bool flag = true;
try
{
switch (zipEnum)
{
case ZipEnum.BZIP:
FileStream inStream = File.OpenRead(zipFileName);
FileStream outStream = File.Open(unzipFileName, FileMode.Create);
BZip.Decompress(inStream, outStream, true);
break;
case ZipEnum.GZIP:
GZipInputStream zipFile = newGZipInputStream(File.OpenRead(zipFileName));
FileStream destFile = File.Open(unzipFileName, FileMode.Create);
int bufferSize = * ;
byte[] fileData = new byte[bufferSize];
while (bufferSize > )
{
bufferSize = zipFile.Read(fileData, , bufferSize);
zipFile.Write(fileData, , bufferSize);
}
destFile.Close();
zipFile.Close();
break;
default: break;
}
}
catch
{
flag = false;
}
return flag;
}
#endregion

#region 制作压缩包（多个文件压缩到一个压缩包，支持加密、注释）
/// <summary>
/// 制作压缩包（多个文件压缩到一个压缩包，支持加密、注释）
/// </summary>
/// <param name="topDirectoryName">压缩文件目录</param>
/// <param name="zipedFileName">压缩包文件名</param>
/// <param name="compresssionLevel">压缩级别 -</param>
/// <param name="password">密码</param>
/// <param name="comment">注释</param>
public static void ZipFiles(string topDirectoryName, string zipedFileName, intcompresssionLevel, string password, string comment)
{
using (ZipOutputStream zos = newZipOutputStream(File.Open(zipedFileName, FileMode.OpenOrCreate)))
{
if (compresssionLevel != )
{
zos.SetLevel(compresssionLevel);//设置压缩级别
}
if (!string.IsNullOrEmpty(password))
{
zos.Password = password;//设置zip包加密密码
}
if (!string.IsNullOrEmpty(comment))
{
zos.SetComment(comment);//设置zip包的注释
}
//循环设置目录下所有的*.jpg文件（支持子目录搜索）
foreach (string file inDirectory.GetFiles(topDirectoryName, "*.jpg", SearchOption.AllDirectories))
{
if (File.Exists(file))
{
FileInfo item = new FileInfo(file);
FileStream fs = File.OpenRead(item.FullName);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, , buffer.Length);
ZipEntry entry = new ZipEntry(item.Name);
zos.PutNextEntry(entry);
zos.Write(buffer, , buffer.Length);
}
}
}
}
#endregion

#region 解压缩包（将压缩包解压到指定目录）
/// <summary>
/// 解压缩包（将压缩包解压到指定目录）
/// </summary>
/// <param name="zipedFileName">压缩包名称</param>
/// <param name="unZipDirectory">解压缩目录</param>
/// <param name="password">密码</param>
public static void UnZipFiles(string zipedFileName, string unZipDirectory, stringpassword)
{
using (ZipInputStream zis = newZipInputStream(File.Open(zipedFileName, FileMode.OpenOrCreate)))
{
if (!string.IsNullOrEmpty(password))
{
zis.Password = password;//有加密文件的，可以设置密码解压
}
ZipEntry zipEntry;
while ((zipEntry = zis.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(unZipDirectory);
string pathName = Path.GetDirectoryName(zipEntry.Name);
string fileName = Path.GetFileName(zipEntry.Name);
pathName = pathName.Replace(".", "$");
directoryName += "\\" + pathName;
if (!Directory.Exists(directoryName))
{
Directory.CreateDirectory(directoryName);
}
if (!string.IsNullOrEmpty(fileName))
{
FileStream fs = File.Create(Path.Combine(directoryName, fileName));
int size = ;
byte[] bytes = new byte[];
while (true)
{
size = zis.Read(bytes, , bytes.Length);
if (size > )
{
fs.Write(bytes, , size);
}
else
{
break;
}
}
fs.Close();
}
}
}
}
#endregion

ZipFileUtil.ZipFiles(@"E:\\test\\", "E:\\test.zip", 1, "admin", "this is admin's comment.");//制作压缩包 
ZipFileUtil.UnZipFiles("E:\\test.zip", "E:\\guwei4037\\", "admin");//解压缩包