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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO; using ICSharpCode.SharpZipLib.Zip; using ICSharpCode.SharpZipLib.Checksums; namespace Cis.DRGsSystem.Service { /// <summary> /// 壓縮和解壓文件 /// </summary> public class ZipClass { /// <summary> /// 所有文件緩存 /// </summary> List<string> files = new List<string>(); /// <summary> /// 所有空目錄緩存 /// </summary> List<string> paths = new List<string>(); /// <summary> /// 壓縮單個(gè)文件 /// </summary> /// <param name="fileToZip">要壓縮的文件</param> /// <param name="zipedFile">壓縮后的文件全名</param> /// <param name="compressionLevel">壓縮程度，范圍0-9，數(shù)值越大，壓縮程序越高</param> /// <param name="blockSize">分塊大小</param> public void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize) { if (!System.IO.File.Exists(fileToZip))//如果文件沒(méi)有找到，則報(bào)錯(cuò) { throw new FileNotFoundException("The specified file " + fileToZip + " could not be found. Zipping aborderd"); } FileStream streamToZip = new FileStream(fileToZip, FileMode.Open, FileAccess.Read); FileStream zipFile = File.Create(zipedFile); ZipOutputStream zipStream = new ZipOutputStream(zipFile); ZipEntry zipEntry = new ZipEntry(fileToZip); zipStream.PutNextEntry(zipEntry); zipStream.SetLevel(compressionLevel); byte[] buffer = new byte[blockSize]; int size = streamToZip.Read(buffer, 0, buffer.Length); zipStream.Write(buffer, 0, size); try { while (size < streamToZip.Length) { int sizeRead = streamToZip.Read(buffer, 0, buffer.Length); zipStream.Write(buffer, 0, sizeRead); size += sizeRead; } } catch (System.Exception ex) { GC.Collect(); throw ex; } zipStream.Finish(); zipStream.Close(); streamToZip.Close(); GC.Collect(); } /// <summary> /// 壓縮目錄（包括子目錄及所有文件） /// </summary> /// <param name="rootPath">要壓縮的根目錄</param> /// <param name="destinationPath">保存路徑</param> /// <param name="compressLevel">壓縮程度，范圍0-9，數(shù)值越大，壓縮程序越高</param> public void ZipFileFromDirectory(string rootPath, string destinationPath, int compressLevel) { GetAllDirectories(rootPath); //得到當(dāng)前路徑的位置，以備壓縮時(shí)將所壓縮內(nèi)容轉(zhuǎn)變成相對(duì)路徑。 string rootMark = rootPath.Substring(0, rootPath.LastIndexOf("\\") + 1); 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);//打開(kāi)壓縮文件 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; 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> /// 取得目錄下所有文件及文件夾，分別存入files及paths /// </summary> /// <param name="rootPath">根目錄</param> private void GetAllDirectories(string rootPath) { string[] subPaths = Directory.GetDirectories(rootPath);//得到所有子目錄 foreach (string path in subPaths) { GetAllDirectories(path);//對(duì)每一個(gè)字目錄做與根目錄相同的操作：即找到子目錄并將當(dāng)前目錄的文件名存入List } string[] files = Directory.GetFiles(rootPath); foreach (string file in files) { this.files.Add(file);//將當(dāng)前目錄中的所有文件全名存入文件List } if (subPaths.Length == files.Length && files.Length == 0)//如果是空目錄 { this.paths.Add(rootPath);//記錄空目錄 } } /// <summary> /// 解壓縮文件(壓縮文件中含有子目錄) /// </summary> /// <param name="zipfilepath">待解壓縮的文件路徑</param> /// <param name="unzippath">解壓縮到指定目錄</param> /// <returns>解壓后的文件列表</returns> public List<string> UnZip(string zipfilepath, string unzippath) { //解壓出來(lái)的文件列表 List<string> unzipFiles = new List<string>(); //檢查輸出目錄是否以“\\”結(jié)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); //生成解壓目錄【用戶(hù)解壓到硬盤(pán)根目錄時(shí)，不需要?jiǎng)?chuàng)建】 if (!string.IsNullOrEmpty(directoryName)) { Directory.CreateDirectory(directoryName); } if (fileName != String.Empty) { //如果文件的壓縮后大小為0那么說(shuō)明這個(gè)文件是空的,因此不需要進(jìn)行讀出寫(xiě)入 if (theEntry.CompressedSize == 0) break; //解壓文件到指定的目錄 directoryName = Path.GetDirectoryName(unzippath + theEntry.Name); //建立下面的目錄和子目錄 Directory.CreateDirectory(directoryName); //記錄導(dǎo)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; } } } |
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來(lái)自： 修行的嘟嘟 > 《軟件開(kāi)發(fā)》
