.Net 下利用ICSharpCode.SharpZipLib.dll实现文件/文件夹压缩、解压缩（改进）

对原有代码的改进，完善了功能

1.增加了压缩文件夹，解压缩文件夹的功能

2.解压缩文件时，对目标文件的目录检查，没有则创建

 

代码如下：

using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Collections.Generic;using System.IO;using ICSharpCode.SharpZipLib.Zip;using ICSharpCode.SharpZipLib.Checksums;namespace Util{ /// <summary> /// 文件(夹)压缩、解压缩 /// </summary> public abstract class FileCompression { #region 压缩文件 /// <summary> /// 压缩文件 /// </summary> /// <param name="fileNames">要打包的文件列表</param> /// <param name="GzipFileName">目标文件名</param> /// <param name="CompressionLevel">压缩品质级别（0~9）</param> /// <param name="deleteFile">是否删除原文件</param> public static void CompressFile(List<FileInfo> fileNames, string GzipFileName, int CompressionLevel, bool deleteFile) { ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName)); try { s.SetLevel(CompressionLevel); //0 - store only to 9 - means best compression foreach (FileInfo file in fileNames) { FileStream fs = null; try { fs = file.Open(FileMode.Open, FileAccess.ReadWrite); } catch { continue; } // 方法二，将文件分批读入缓冲区 byte[] data = new byte[2048]; int size = 2048; ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name)); entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime); s.PutNextEntry(entry); while (true) { size = fs.Read(data, 0, size); if (size <= 0) break; s.Write(data, 0, size); } fs.Close(); if (deleteFile) { file.Delete(); } } } finally { s.Finish(); s.Close(); } } /// <summary> /// 压缩文件夹 /// </summary> /// <param name="dirPath">要打包的文件夹</param> /// <param name="GzipFileName">目标文件名</param> /// <param name="CompressionLevel">压缩品质级别（0~9）</param> /// <param name="deleteDir">是否删除原文件夹</param> public static void CompressDirectory(string dirPath, string GzipFileName, int CompressionLevel, bool deleteDir) { //压缩文件为空时默认与压缩文件夹同一级目录 if (GzipFileName == string.Empty) { GzipFileName = dirPath.Substring(dirPath.LastIndexOf("//") + 1); GzipFileName = dirPath.Substring(0, dirPath.LastIndexOf("//")) + "//" + GzipFileName + ".zip"; } //if (Path.GetExtension(GzipFileName) != ".zip") //{ // GzipFileName = GzipFileName + ".zip"; //} using (ZipOutputStream zipoutputstream = new ZipOutputStream(File.Create(GzipFileName))) { zipoutputstream.SetLevel(CompressionLevel); Crc32 crc = new Crc32(); Dictionary<string, DateTime> fileList = GetAllFies(dirPath); foreach (KeyValuePair<string, DateTime> item in fileList) { FileStream fs = File.OpenRead(item.Key.ToString()); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); ZipEntry entry = new ZipEntry(item.Key.Substring(dirPath.Length)); entry.DateTime = item.Value; entry.Size = fs.Length; fs.Close(); crc.Reset(); crc.Update(buffer); entry.Crc = crc.Value; zipoutputstream.PutNextEntry(entry); zipoutputstream.Write(buffer, 0, buffer.Length); } } if (deleteDir) { Directory.Delete(dirPath, true); } } /// <summary> /// 获取所有文件 /// </summary> /// <returns></returns> private static Dictionary<string, DateTime> GetAllFies(string dir) { Dictionary<string, DateTime> FilesList = new Dictionary<string, DateTime>(); DirectoryInfo fileDire = new DirectoryInfo(dir); if (!fileDire.Exists) { throw new System.IO.FileNotFoundException("目录:" + fileDire.FullName + "没有找到!"); } GetAllDirFiles(fileDire, FilesList); GetAllDirsFiles(fileDire.GetDirectories(), FilesList); return FilesList; } /// <summary> /// 获取一个文件夹下的所有文件夹里的文件 /// </summary> /// <param name="dirs"></param> /// <param name="filesList"></param> private static void GetAllDirsFiles(DirectoryInfo[] dirs, Dictionary<string, DateTime> filesList) { foreach (DirectoryInfo dir in dirs) { foreach (FileInfo file in dir.GetFiles("*.*")) { filesList.Add(file.FullName, file.LastWriteTime); } GetAllDirsFiles(dir.GetDirectories(), filesList); } } /// <summary> /// 获取一个文件夹下的文件 /// </summary> /// <param name="dir">目录名称</param> /// <param name="filesList">文件列表HastTable</param> private static void GetAllDirFiles(DirectoryInfo dir, Dictionary<string, DateTime> filesList) { foreach (FileInfo file in dir.GetFiles("*.*")) { filesList.Add(file.FullName, file.LastWriteTime); } } #endregion #region 解压缩文件 /// <summary> /// 解压缩文件 /// </summary> /// <param name="GzipFile">压缩包文件名</param> /// <param name="targetPath">解压缩目标路径</param> public static void Decompress(string GzipFile, string targetPath) { //string directoryName = Path.GetDirectoryName(targetPath + "//") + "//"; string directoryName = targetPath; if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);//生成解压目录 string CurrentDirectory = directoryName; byte[] data = new byte[2048]; int size = 2048; ZipEntry theEntry = null; using (ZipInputStream s = new ZipInputStream(File.OpenRead(GzipFile))) { while ((theEntry = s.GetNextEntry()) != null) { if (theEntry.IsDirectory) {// 该结点是目录 if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name); } else { if (theEntry.Name != String.Empty) { // 检查多级目录是否存在 if (theEntry.Name.Contains("//")) { string parentDirPath = theEntry.Name.Remove(theEntry.Name.LastIndexOf("//") + 1); if (!Directory.Exists(parentDirPath)) { Directory.CreateDirectory(CurrentDirectory + parentDirPath); } } //解压文件到指定的目录 using (FileStream streamWriter = File.Create(CurrentDirectory + theEntry.Name)) { while (true) { size = s.Read(data, 0, data.Length); if (size <= 0) break; streamWriter.Write(data, 0, size); } streamWriter.Close(); } } } } s.Close(); } } #endregion }}