最近做一个项目需要压缩,解压文件夹及文件夹里面的子文件夹、文件,在网上找了许多资料,有两种实例:
实例一:
#region 压缩文件
/// 递归压缩文件夹方法
private bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)
{
bool res = true;
string[] folders, filenames;
ZipEntry entry = null;
FileStream fs = null;
Crc32 crc = new Crc32();
try
{
//创建当前文件夹
entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/")); //加上 “/” 才会当成是文件夹创建
s.PutNextEntry(entry);
s.Flush();
//先压缩文件,再递归压缩文件夹
filenames = Directory.GetFiles(FolderToZip);
foreach (string file in filenames)
{
//打开压缩文件
fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
catch
{
res = false;
}
finally
{
if (fs != null)
{
fs.Close();
fs = null;
}
if (entry != null)
{
entry = null;
}
GC.Collect();
GC.Collect(1);
}
folders = Directory.GetDirectories(FolderToZip);
foreach (string folder in folders)
{
if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))
{
return false;
}
}
return res;
}
/// <summary>
/// 压缩目录
/// </summary>
/// <param name="FolderToZip">待压缩的文件夹,全路径格式</param>
/// <param name="ZipedFile">压缩后的文件名,全路径格式</param>
/// <param name="Password"></param>
/// <returns></returns>
private bool ZipFileDictory(string FolderToZip, string ZipedFile, String Password)
{
bool res;
if (!Directory.Exists(FolderToZip))
{
return false;
}
ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));
s.SetLevel(6);
s.Password = Password;
res = ZipFileDictory(FolderToZip, s, "");
s.Finish();
s.Close();
return res;
}
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="FileToZip">要进行压缩的文件名</param>
/// <param name="ZipedFile">压缩后生成的压缩文件名</param>
/// <param name="Password"></param>
/// <returns></returns>
private bool ZipFile(string FileToZip, string ZipedFile, String Password)
{
//如果文件没有找到,则报错
if (!File.Exists(FileToZip))
{
throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
}
//FileStream fs = null;
FileStream ZipFile = null;
ZipOutputStream ZipStream = null;
ZipEntry ZipEntry = null;
bool res = true;
try
{
ZipFile = File.OpenRead(FileToZip);
byte[] buffer = new byte[ZipFile.Length];
ZipFile.Read(buffer, 0, buffer.Length);
ZipFile.Close();
ZipFile = File.Create(ZipedFile);
ZipStream = new ZipOutputStream(ZipFile);
ZipStream.Password = Password;
ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(6);
ZipStream.Write(buffer, 0, buffer.Length);
}
catch
{
res = false;
}
finally
{
if (ZipEntry != null)
{
ZipEntry = null;
}
if (ZipStream != null)
{
ZipStream.Finish();
ZipStream.Close();
}
if (ZipFile != null)
{
ZipFile.Close();
ZipFile = null;
}
GC.Collect();
GC.Collect(1);
}
return res;
}
/// <summary>
/// 压缩文件 和 文件夹
/// </summary>
/// <param name="FileToZip">待压缩的文件或文件夹,全路径格式</param>
/// <param name="ZipedFile">压缩后生成的压缩文件名,全路径格式</param>
/// <param name="Password"></param>
/// <returns></returns>
private bool Zip(String FileToZip, String ZipedFile, String Password)
{
if (Directory.Exists(FileToZip))
{
return ZipFileDictory(FileToZip, ZipedFile, Password);
}
else if (File.Exists(FileToZip))
{
return ZipFile(FileToZip, ZipedFile, Password);
}
else
{
return false;
}
}
#endregion
#region 解压文件
/// <summary>
/// 解压功能(解压压缩文件到指定目录)
/// </summary>
/// <param name="FileToUpZip">待解压的文件</param>
/// <param name="ZipedFolder">指定解压目标目录</param>
/// <param name="Password"></param>
private void UnZip(string FileToUpZip, string ZipedFolder, string Password)
{
if (!File.Exists(FileToUpZip))
{
return;
}
if (!Directory.Exists(ZipedFolder))
{
Directory.CreateDirectory(ZipedFolder);
}
ZipInputStream s = null;
ZipEntry theEntry = null;
string fileName;
FileStream streamWriter = null;
try
{
s = new ZipInputStream(File.OpenRead(FileToUpZip));
s.Password = Password;
while ((theEntry = s.GetNextEntry()) != null)
{
if (theEntry.Name != String.Empty)
{
fileName = Path.Combine(ZipedFolder, theEntry.Name);
/**/
///判断文件路径是否是文件夹
if (fileName.EndsWith("/") || fileName.EndsWith("\\"))
{
Directory.CreateDirectory(fileName);
continue;
}
streamWriter = File.Create(fileName);
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;
}
}
}
}
}
finally
{
if (streamWriter != null)
{
streamWriter.Close();
streamWriter = null;
}
if (theEntry != null)
{
theEntry = null;
}
if (s != null)
{
s.Close();
s = null;
}
GC.Collect();
GC.Collect(1);
}
}
#endregion
实例二:
#region 压缩文件方法二
public void ZipFilenew(string strFileFolder, string strZip)
{
if (strFileFolder[strFileFolder.Length - 1] != Path.DirectorySeparatorChar)
strFileFolder += Path.DirectorySeparatorChar;
ZipOutputStream s = new ZipOutputStream(File.Create(strZip));
s.SetLevel(6); // 0 - store only to 9 - means best compression
zip(strFileFolder, strZip, s);
s.Finish();
s.Close();
}
private void zip(string strFile, string StoreFile, ZipOutputStream s)
{
if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
strFile += Path.DirectorySeparatorChar;
Crc32 crc = new Crc32();
string[] filenames = Directory.GetFileSystemEntries(strFile);
foreach (string file in filenames)
{
if (Directory.Exists(file))
{
zip(file, StoreFile, s);
}
else
{
//打开压缩文件,开始压缩
FileStream fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
string tempfile = file.Substring(StoreFile.LastIndexOf("\\") + 1);
ZipEntry entry = new ZipEntry(tempfile);
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
}
#endregion
#region 解压文件方法二
public string unZipFile(string TargetFile, string fileDir)
{
string rootFile = " ";
try
{
//读取压缩文件(zip文件),准备解压缩
ZipInputStream s = new ZipInputStream(File.OpenRead(TargetFile.Trim()));
ZipEntry theEntry;
string path = fileDir;
//解压出来的文件保存的路径
string rootDir = " ";
//根目录下的第一个子文件夹的名称
while ((theEntry = s.GetNextEntry()) != null)
{
rootDir = Path.GetDirectoryName(theEntry.Name);
//得到根目录下的第一级子文件夹的名称
if (rootDir.IndexOf("\\") >= 0)
{
rootDir = rootDir.Substring(0, rootDir.IndexOf("\\") + 1);
}
string dir = Path.GetDirectoryName(theEntry.Name);
//根目录下的第一级子文件夹的下的文件夹的名称
string fileName = Path.GetFileName(theEntry.Name);
//根目录下的文件名称
if (dir != " ")
//创建根目录下的子文件夹,不限制级别
{
if (!Directory.Exists(fileDir + "\\" + dir))
{
path = fileDir + "\\" + dir;
//在指定的路径创建文件夹
Directory.CreateDirectory(path);
}
}
else if (dir == " " && fileName != "")
//根目录下的文件
{
path = fileDir;
rootFile = fileName;
}
else if (dir != " " && fileName != "")
//根目录下的第一级子文件夹下的文件
{
if (dir.IndexOf("\\") > 0)
//指定文件保存的路径
{
path = fileDir + "\\" + dir;
}
}
if (dir == rootDir)
//判断是不是需要保存在根目录下的文件
{
path = fileDir + "\\" + rootDir;
}
//以下为解压缩zip文件的基本步骤
//基本思路就是遍历压缩文件里的所有文件,创建一个相同的文件。
if (fileName != String.Empty)
{
FileStream streamWriter = File.Create(path + "\\" + fileName);
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();
return rootFile;
}
catch (Exception ex)
{
return "1; " + ex.Message;
}
}
#endregion
这里有个问题,实例二中的解压文件的时候,如果解压到的路径中存在解压文件中的文件,解压的时候不会覆盖,这点值得注意。
另外压缩解压文件要用到ICSharpCode.SharpZipLib.dll这个dll,网上可以搜到下载地址。