因为程序中需要对指定文件进行压缩，然后再对已压缩的文件进行加密上传，所以，在网上找了一个已经实现的方法就用了。结果不用不知道，用了就差点挂掉，网上找到的类中解压会出问题，竟然能多出很多数据，压缩多级目录竟然出现目录错乱等诸多问题。最终，对出现的问题也进行了相关的修改（未发现的问题就不晓得了），利用C#的开源组件ICSharpCode.SharpZipLib实现，以下对代码就做下记录。
public static class ZipUtil
{
#region 压缩
/// <summary>
/// 递归压缩文件夹的内部方法
/// </summary>
/// <param name="folderToZip">要压缩的文件夹路径</param>
/// <param name="zipStream">压缩输出流</param>
/// <param name="parentFolderName">此文件夹的上级文件夹</param>
///
private static bool ZipDirectory(string folderToZip, ZipOutputStream zipStream, string parentFolderName)
{
bool result = true;
string[] folders, files;
ZipEntry ent = null;
FileStream fs = null;
Crc32 crc = new Crc32();
try
{
folders = Directory.GetDirectories(folderToZip);
foreach (string folder in folders)
{
if (!ZipDirectory(folder, zipStream, folderToZip))
{
return false;
}
}
files = Directory.GetFiles(folderToZip);
foreach (string file in files)
{
fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
string filePath = "";
if (string.IsNullOrEmpty(parentFolderName))
{
int lastFolderIndex= folderToZip.LastIndexOf("\\");
if (lastFolderIndex == -1)
{
lastFolderIndex = folderToZip.LastIndexOf("/");
}
filePath = file.Substring(lastFolderIndex + 1);
}
else
{
int lastFolderIndex = parentFolderName.LastIndexOf("\\");
if (lastFolderIndex == -1)
{
lastFolderIndex = parentFolderName.LastIndexOf("/");
}
filePath = file.Substring(lastFolderIndex + 1);
}
ent = new ZipEntry(filePath);
ent.DateTime = DateTime.Now;
ent.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
ent.Crc = crc.Value;
zipStream.PutNextEntry(ent);
zipStream.Write(buffer, 0, buffer.Length);
}
}
catch
{
result = false;
}
finally
{
if (fs != null)
{
fs.Close();
fs.Dispose();
}
if (ent != null)
{
ent = null;
}
GC.Collect();
GC.Collect(1);
}
return result;
}
/// <summary>
/// 压缩文件夹
/// </summary>
/// <param name="folderToZip">要压缩的文件夹路径</param>
/// <param name="zipedFile">压缩文件完整路径</param>
/// <param name="password">密码</param>
/// 是否压缩成功
public static bool ZipDirectory(string folderToZip, string zipedFile, string password)
{
bool result = false;
if (!Directory.Exists(folderToZip))
{
return result;
}
ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFile));
zipStream.SetLevel(6);
if (!string.IsNullOrEmpty(password))
{
zipStream.Password = password;
}
result = ZipDirectory(folderToZip, zipStream, "");
zipStream.Finish();
zipStream.Close();
return result;
}
/// <summary>
/// 压缩文件夹
/// </summary>
/// <param name="folderToZip">要压缩的文件夹路径</param>
/// <param name="zipedFile">压缩文件完整路径</param>
/// 是否压缩成功
public static bool ZipDirectory(string folderToZip, string zipedFile)
{
bool result = ZipDirectory(folderToZip, zipedFile, null);
return result;
}
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="fileToZip">要压缩的文件全名</param>
/// <param name="zipedFile">压缩后的文件名</param>
/// <param name="password">密码</param>
/// 压缩结果
public static bool ZipFile(string fileToZip, string zipedFile, string password)
{
bool result = true;
ZipOutputStream zipStream = null;
FileStream fs = null;
ZipEntry ent = null;
if (!File.Exists(fileToZip))
return false;
try
{
fs = File.OpenRead(fileToZip);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
fs.Close();
fs = File.Create(zipedFile);
zipStream = new ZipOutputStream(fs);
if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
ent = new ZipEntry(Path.GetFileName(fileToZip));
zipStream.PutNextEntry(ent);
zipStream.SetLevel(6);
zipStream.Write(buffer, 0, buffer.Length);
}
catch
{
result = false;
}
finally
{
if (zipStream != null)
{
zipStream.Finish();
zipStream.Close();
}
if (ent != null)
{
ent = null;
}
if (fs != null)
{
fs.Close();
fs.Dispose();
}
if (!result && !string.IsNullOrEmpty(zipedFile) && File.Exists(zipedFile))
{
File.Delete(zipedFile);
}
}
GC.Collect();
GC.Collect(1);
return result;
}
/// <summary>
/// 压缩文件 将指定的文件列表压缩为一个文件压缩包
/// </summary>
/// <param name="fileToZipList">需要压缩的文件列表</param>
/// <param name="zipedFile">将要压缩为ZIP的文件</param>
/// <param name="password">压缩包密码。可以为空</param>
///
public static bool ZipFile(List fileToZipList, string zipedFile, string password = "")
{
bool result = false;
foreach (string item in fileToZipList)
{
if (!File.Exists(item))
{
return result;
}
}
ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFile));
zipStream.SetLevel(6);
if (!string.IsNullOrEmpty(password))
{
zipStream.Password = password;
}
ZipEntry ent = null;
FileStream fs = null;
Crc32 crc = new Crc32();
try
{
foreach (string file in fileToZipList)
{
fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
string filePath = Path.GetFileName(file);
ent = new ZipEntry(filePath);
ent.DateTime = DateTime.Now;
ent.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
ent.Crc = crc.Value;
zipStream.PutNextEntry(ent);
zipStream.Write(buffer, 0, buffer.Length);
}
result = true;
}
catch
{
result = false;
}
finally
{
if (fs != null)
{
fs.Close();
fs.Dispose();
}
if (ent != null)
{
ent = null;
}
GC.Collect();
GC.Collect(1);
}
zipStream.Finish();
zipStream.Close();
return result;
}
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="fileToZip">要压缩的文件全名</param>
/// <param name="zipedFile">压缩后的文件名</param>
/// 压缩结果
public static bool ZipFile(string fileToZip, string zipedFile)
{
bool result = ZipFile(fileToZip, zipedFile, null);
return result;
}
/// <summary>
/// 压缩文件或文件夹
/// </summary>
/// <param name="fileToZip">要压缩的路径</param>
/// <param name="zipedFile">压缩后的文件名</param>
/// <param name="password">密码</param>
/// 压缩结果
public static bool Zip(string fileToZip, string zipedFile, string password)
{
bool result = false;
if (Directory.Exists(fileToZip))
result = ZipDirectory(fileToZip, zipedFile, password);
else if (File.Exists(fileToZip))
result = ZipFile(fileToZip, zipedFile, password);
return result;
}
/// <summary>
/// 压缩文件或文件夹
/// </summary>
/// <param name="fileToZip">要压缩的路径</param>
/// <param name="zipedFile">压缩后的文件名</param>
/// 压缩结果
public static bool Zip(string fileToZip, string zipedFile)
{
bool result = Zip(fileToZip, zipedFile, null);
return result;
}
#endregion
#region 解压
/// <summary>
/// 解压功能(解压压缩文件到指定目录)
/// </summary>
/// <param name="fileToUnZip">待解压的文件</param>
/// <param name="zipedFolder">指定解压目标目录</param>
/// <param name="password">密码</param>
/// 解压结果
public static bool UnZip(string fileToUnZip, string zipedFolder, string password)
{
bool result = true;
FileStream fs = null;
ZipInputStream zipStream = null;
ZipEntry ent = null;
FileStream fileStream = null;
string fileName = "";
if (!File.Exists(fileToUnZip))
return false;
if (!Directory.Exists(zipedFolder))
Directory.CreateDirectory(zipedFolder);
try
{
fileStream = File.OpenRead(fileToUnZip);
zipStream = new ZipInputStream(fileStream);
if (!string.IsNullOrEmpty(password)) { zipStream.Password = password; }
while ((ent = zipStream.GetNextEntry()) != null)
{
if (!string.IsNullOrEmpty(ent.Name))
{
fileName = Path.Combine(zipedFolder, ent.Name);
fileName = fileName.Replace('/', '\\');//change by Mr.HopeGi
int index = ent.Name.LastIndexOf('/');
if (index != -1 || fileName.EndsWith("\\"))
{
string tmpDir = (index != -1 ? fileName.Substring(0, fileName.LastIndexOf('\\')) : fileName) + "\\";
if (!Directory.Exists(tmpDir))
{
Directory.CreateDirectory(tmpDir);
}
if (tmpDir == fileName)
{
continue;
}
}
fs = File.Create(fileName);
int size = 2048;
byte[] data = new byte[size];
while (true)
{
size = zipStream.Read(data, 0, data.Length);
if (size > 0)
{
fs.Write(data, 0, size);
Array.Clear(data, 0, data.Length);
}
else
{
break;
}
}
}
}
}
catch
{
result = false;
}
finally
{
if (fs != null)
{
fs.Close();
fs.Dispose();
}
if (zipStream != null)
{
zipStream.Close();
zipStream.Dispose();
}
if (ent != null)
{
ent = null;
}
fileStream?.Close();
fileStream?.Dispose();
GC.Collect();
GC.Collect(1);
if (!result)
{
if (!string.IsNullOrEmpty(fileName) && File.Exists(fileName))
{
File.Delete(fileName);
}
}
}
return result;
}
/// <summary>
/// 解压功能(解压压缩文件到指定目录)
/// </summary>
/// <param name="fileToUnZip">待解压的文件</param>
/// <param name="zipedFolder">指定解压目标目录</param>
/// 解压结果
public static bool UnZip(string fileToUnZip, string zipedFolder)
{
bool result = UnZip(fileToUnZip, zipedFolder, null);
return result;
}
#endregion
}
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