C#解压、压缩高级用法
压缩：（可以吧要排除的文件去掉）
/// <summary>
/// 压缩文件夹
/// </summary>
/// <param name="folder"></param>
/// <param name="zipedFileName"></param>
/// <param name="compressionLevel">压缩率0（无压缩）9（压缩率最高）</param>
public static void ZipDir(string zipedFileName, string folder, string dirEntryPrefix = null, string excludePathReg = null, int compressionLevel = 4)
{
if (Path.GetExtension(zipedFileName) != ".zip")
{
zipedFileName = zipedFileName + ".zip";
}
ZipDir(zipedFileName, new string[] { folder }, new string[] { dirEntryPrefix }, new string[] { excludePathReg }, compressionLevel);
}
public static void ZipDir(string zipedFileName, string[] folders, string[] dirEntryPrefixs = null, string[] excludePathRegs = null, int compressionLevel = 4)
{
if (Path.GetExtension(zipedFileName) != ".zip")
{
zipedFileName = zipedFileName + ".zip";
}
if (string.IsNullOrEmpty(zipedFileName) || folders == null) return;
if (dirEntryPrefixs != null && folders.Length != dirEntryPrefixs.Length)
throw new Exception("数组个数不一致");
if (excludePathRegs != null && folders.Length != excludePathRegs.Length)
throw new Exception("数组个数不一致");
FileUtils.CreateDirectoryIfNotExists(Path.GetDirectoryName(zipedFileName));
using (var zipoutputstream = new ZipOutputStream(File.Create(zipedFileName)))
{
zipoutputstream.SetLevel(compressionLevel);
Crc32 crc = new Crc32();
for (int i = 0; i < folders.Length; i++)
{
string folder = folders[i];
folder = Path.GetFullPath(folder); //先将文件夹名称标准化
string excludePathReg = null;
if (excludePathRegs != null) excludePathReg = excludePathRegs[i];
string dirEntryPrefix = null;
if (dirEntryPrefixs != null) dirEntryPrefix = dirEntryPrefixs[i];
List<FileInfo> allFiles = GetAllFileEntries(folder, excludePathReg);
if (allFiles == null) continue;
foreach (FileInfo fileInfo in allFiles)
{
//读取文件内容
//FileStream fs = new FileStream(fileInfo.FullName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//byte[] buffer = new byte[fs.Length];
//fs.Read(buffer, 0, buffer.Length);
//fs.Close();
byte[] buffer = File.ReadAllBytes(fileInfo.FullName);
//生成路径
string entryPath;
if (File.Exists(folder)) entryPath = fileInfo.Name; //但如果“文件夹”本身就是独立的文件，则直接取文件名
else entryPath = fileInfo.FullName.Substring(folder.Length + 1); //全路径减去原文件夹的路径
if (!string.IsNullOrEmpty(dirEntryPrefix))
{
entryPath = Path.Combine(dirEntryPrefix, entryPath); //加上前缀
}
entryPath = entryPath.Replace('\\', '/');
ZipEntry entry = new ZipEntry(entryPath);
entry.DateTime = fileInfo.LastWriteTime;
entry.Size = fileInfo.Length;
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
zipoutputstream.PutNextEntry(entry);
zipoutputstream.Write(buffer, 0, buffer.Length);
}
}
}
}
public static List<FileInfo> GetAllFileEntries(string folder, string excludePathReg = null)
{
if (string.IsNullOrEmpty(folder)) return null;
if (File.Exists(folder)) //如果是文件，则直接返回该文件
{
return new List<FileInfo>() { new FileInfo(folder) };
}
//一般情况下是数组
DirectoryInfo dirInfo = new DirectoryInfo(folder);
if (!dirInfo.Exists) return null;
List<FileInfo> result = new List<FileInfo>();
//先遍历下面所有的文件
foreach (FileInfo fileInfo in dirInfo.GetFiles())
{
string fileName = fileInfo.Name;
if (fileName == ".DS_Store" || fileName.StartsWith("._"))
continue; // mac系统下的系统文件直接忽略
if (!string.IsNullOrEmpty(excludePathReg))//排除一些
{
if (Regex.IsMatch(fileInfo.FullName, excludePathReg)) continue;
}
result.Add(fileInfo);
}
//再递归遍历下面所有的子文件夹
foreach (DirectoryInfo subDir in dirInfo.GetDirectories())
{
result.AddRange(GetAllFileEntries(subDir.FullName, excludePathReg));
}
return result;
}
解压：（可以对要解压的文件进行操作，转换在lambda中加方法中就行）
public static int UnZip(string zipFilePath, string unZipDir)
{
return UnZip(zipFilePath, unZipDir, false, null, null);
}
public static int UnZipGGBforBook(string zipFilePath, string unZipDir)
{
return UnZip(zipFilePath, unZipDir, true, ConvertGGBtoBase64,
fileName => fileName.Replace(".ggb", ".js"));
}
private static Stream ConvertGGBtoBase64(MemoryStream stream)
{
//将GGB内容转成base64
//stream.Seek(0, SeekOrigin.Begin);
//int len = (int)stream.Length;
//byte[] buffer = new byte[len];
//stream.Read(buffer, 0, len);
byte[] buffer = stream.ToArray();
string base64 = Convert.ToBase64String(buffer);
string content = "var 1111=\"" + base64 +"\";";
byte[] contentBytes = Encoding.UTF8.GetBytes(content);
//MemoryStream memory = new MemoryStream();
//memory.Write(contentBytes, 0, contentBytes.Length);
MemoryStream memory = new MemoryStream(contentBytes);
return memory;
}
/// <summary>
/// 功能：解压zip格式的文件。
/// </summary>
/// <param name="zipFilePath">压缩文件路径</param>
/// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>
/// <param name="boolBase64">是否生成base64
/// <returns>解压是否成功</returns>
public static int UnZip(string zipFilePath, string unZipDir, bool ignoreTargetRootDir,
Func<MemoryStream,Stream> contentConverter, Func<string, string> fileNameConverter)
{
if (string.IsNullOrEmpty(zipFilePath))
return 0;
if (!File.Exists(zipFilePath))
return 0;
//解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹
if (unZipDir == string.Empty)
unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
if (!unZipDir.EndsWith("\\"))
unZipDir += "\\";
if (!Directory.Exists(unZipDir))
Directory.CreateDirectory(unZipDir);
int fileCnt = 0; //解压的文件数(不含文件夹)
using (var sourceStream = new ZipInputStream(File.OpenRead(zipFilePath)))
{
ZipEntry entry;
while ((entry = sourceStream.GetNextEntry()) != null)
{
string name = entry.Name;
if (string.IsNullOrEmpty(name)) continue;
name = name.Replace("/", "\\");
if (ignoreTargetRootDir)
{
name = name.Substring(name.IndexOf("\\") + 1); //去掉目标文件所带的根目录,如"书名"
}
if (string.IsNullOrEmpty(name)) continue;
string targetName = unZipDir + name; //要放入的目标文件
//删除不在这个地方考虑
//if (targetName.EndsWith("geogebra\\"))//把原始文件下面的先删除
//{
// DeleteDirectory(targetName, null);
//}
//string targetDir = Path.GetDirectoryName(targetName);
//如果是文件夹，则创建文件夹
if (name.EndsWith("\\"))
{
Directory.CreateDirectory(targetName);
continue;
}
//如果是文件，则输出到目标中
//文件名可能需要转换
if (fileNameConverter != null)
{
targetName = fileNameConverter(targetName);
if (string.IsNullOrEmpty(targetName)) continue; //如果得到的文件名为空，则不处理
}
MemoryStream memoryStream = new MemoryStream();
sourceStream.CopyTo(memoryStream);
//byte[] data = new byte[2048];
//while (true)
//{
// int size = sourceStream.Read(data, 0, data.Length);
// if (size == 0) break;
// memoryStream.Write(data, 0, size);
//}
//如果需要转换流
Stream convertedStream = memoryStream;
if (contentConverter != null)
{
convertedStream = contentConverter(memoryStream);
}
FileStream targetStream = File.Create(targetName);
convertedStream.Seek(0, SeekOrigin.Begin);
convertedStream.CopyTo(targetStream);
targetStream.Close();
convertedStream.Close();
if (memoryStream != convertedStream) memoryStream.Close();
fileCnt++;
}
}
return fileCnt;
}
压缩排除文件夹的调用：
excludePathReg.Add("\\\\static\\\\katex\\\\.+");
排除的文件：
string excludeFileReg = "(\\.mp4|\\.avi|\\.rmvb|\\.divx|\\.asf|\\.rm|\\.mpg|\\.mpeg|\\.mpe|\\.wmv|\\.mkv|\\.vob|\\.txt|\\.bat|\\.TXT)$";//排除的文件
