(转)Unity中使用C#实现Zip包的压缩与解压

使用SharpZipLib库，下载地址为：http://icsharpcode.github.io/SharpZipLib/

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/****************************************************** * DESCRIPTION: Zip包的压缩与解压 * *     Copyright (c) 2017, 谭伟俊 （TanWeijun） *     All rights reserved * * CREATED: 2017.03.11, 08:37, CST ******************************************************/   using System.IO; using System.Collections; using UnityEngine; using ICSharpCode.SharpZipLib.Zip;   public static class ZipUtility {     #region ZipCallback     public abstract class ZipCallback     {         /// <summary>         /// 压缩单个文件或文件夹前执行的回调         /// </summary>         /// <param name="_entry"></param>         /// <returns>如果返回true，则压缩文件或文件夹，反之则不压缩文件或文件夹</returns>         public virtual bool OnPreZip(ZipEntry _entry)         {             return true;         }           /// <summary>         /// 压缩单个文件或文件夹后执行的回调         /// </summary>         /// <param name="_entry"></param>         public virtual void OnPostZip(ZipEntry _entry) {}           /// <summary>         /// 压缩执行完毕后的回调         /// </summary>         /// <param name="_result">true表示压缩成功，false表示压缩失败</param>         public virtual void OnFinished(bool _result) {}     }     #endregion       #region UnzipCallback     public abstract class UnzipCallback     {         /// <summary>         /// 解压单个文件或文件夹前执行的回调         /// </summary>         /// <param name="_entry"></param>         /// <returns>如果返回true，则压缩文件或文件夹，反之则不压缩文件或文件夹</returns>         public virtual bool OnPreUnzip(ZipEntry _entry)         {             return true;         }           /// <summary>         /// 解压单个文件或文件夹后执行的回调         /// </summary>         /// <param name="_entry"></param>         public virtual void OnPostUnzip(ZipEntry _entry) {}           /// <summary>         /// 解压执行完毕后的回调         /// </summary>         /// <param name="_result">true表示解压成功，false表示解压失败</param>         public virtual void OnFinished(bool _result) {}     }     #endregion       /// <summary>     /// 压缩文件和文件夹     /// </summary>     /// <param name="_fileOrDirectoryArray">文件夹路径和文件名</param>     /// <param name="_outputPathName">压缩后的输出路径文件名</param>     /// <param name="_password">压缩密码</param>     /// <param name="_zipCallback">ZipCallback对象，负责回调</param>     /// <returns></returns>     public static bool Zip( string[] _fileOrDirectoryArray, string _outputPathName, string _password = null, ZipCallback _zipCallback = null)     {         if ((null == _fileOrDirectoryArray) || string.IsNullOrEmpty(_outputPathName))         {             if (null != _zipCallback)                 _zipCallback.OnFinished(false);               return false;         }           ZipOutputStream zipOutputStream = new ZipOutputStream(File.Create(_outputPathName));         zipOutputStream.SetLevel(6);    // 压缩质量和压缩速度的平衡点         if (!string.IsNullOrEmpty(_password))             zipOutputStream.Password = _password;           for (int index = 0; index < _fileOrDirectoryArray.Length; ++index)         {             bool result = false;             string fileOrDirectory = _fileOrDirectoryArray[index];             if (Directory.Exists(fileOrDirectory))                 result = ZipDirectory(fileOrDirectory, string.Empty, zipOutputStream, _zipCallback);             else if (File.Exists(fileOrDirectory))                 result = ZipFile(fileOrDirectory, string.Empty, zipOutputStream, _zipCallback);               if (!result)             {                 if (null != _zipCallback)                     _zipCallback.OnFinished(false);                   return false;             }         }           zipOutputStream.Finish();         zipOutputStream.Close();           if (null != _zipCallback)             _zipCallback.OnFinished(true);           return true;     }       /// <summary>     /// 解压Zip包     /// </summary>     /// <param name="_filePathName">Zip包的文件路径名</param>     /// <param name="_outputPath">解压输出路径</param>     /// <param name="_password">解压密码</param>     /// <param name="_unzipCallback">UnzipCallback对象，负责回调</param>     /// <returns></returns>     public static bool UnzipFile(string _filePathName, string _outputPath, string _password = null, UnzipCallback _unzipCallback = null)     {         if (string.IsNullOrEmpty(_filePathName) || string.IsNullOrEmpty(_outputPath))         {             if (null != _unzipCallback)                 _unzipCallback.OnFinished(false);               return false;         }           try         {             return UnzipFile(File.OpenRead(_filePathName), _outputPath, _password, _unzipCallback);         }         catch (System.Exception _e)         {             Debug.LogError("[ZipUtility.UnzipFile]: " + _e.ToString());               if (null != _unzipCallback)                 _unzipCallback.OnFinished(false);               return false;         }     }       /// <summary>     /// 解压Zip包     /// </summary>     /// <param name="_fileBytes">Zip包字节数组</param>     /// <param name="_outputPath">解压输出路径</param>     /// <param name="_password">解压密码</param>     /// <param name="_unzipCallback">UnzipCallback对象，负责回调</param>     /// <returns></returns>     public static bool UnzipFile(byte[] _fileBytes, string _outputPath, string _password = null, UnzipCallback _unzipCallback = null)     {         if ((null == _fileBytes) || string.IsNullOrEmpty(_outputPath))         {             if (null != _unzipCallback)                 _unzipCallback.OnFinished(false);               return false;         }           bool result = UnzipFile(new MemoryStream(_fileBytes), _outputPath, _password, _unzipCallback);         if (!result)         {             if (null != _unzipCallback)                 _unzipCallback.OnFinished(false);         }           return result;     }       /// <summary>     /// 解压Zip包     /// </summary>     /// <param name="_inputStream">Zip包输入流</param>     /// <param name="_outputPath">解压输出路径</param>     /// <param name="_password">解压密码</param>     /// <param name="_unzipCallback">UnzipCallback对象，负责回调</param>     /// <returns></returns>     public static bool UnzipFile(Stream _inputStream, string _outputPath, string _password = null, UnzipCallback _unzipCallback = null)     {         if ((null == _inputStream) || string.IsNullOrEmpty(_outputPath))         {             if (null != _unzipCallback)                 _unzipCallback.OnFinished(false);               return false;         }           // 创建文件目录         if (!Directory.Exists(_outputPath))             Directory.CreateDirectory(_outputPath);           // 解压Zip包         ZipEntry entry = null;         using (ZipInputStream zipInputStream = new ZipInputStream(_inputStream))         {             if (!string.IsNullOrEmpty(_password))                 zipInputStream.Password = _password;               while (null != (entry = zipInputStream.GetNextEntry()))             {                 if (string.IsNullOrEmpty(entry.Name))                     continue;                   if ((null != _unzipCallback) && !_unzipCallback.OnPreUnzip(entry))                     continue;   // 过滤                   string filePathName = Path.Combine(_outputPath, entry.Name);                   // 创建文件目录                 if (entry.IsDirectory)                 {                     Directory.CreateDirectory(filePathName);                     continue;                 }                   // 写入文件                 try                 {                     using (FileStream fileStream = File.Create(filePathName))                     {                         byte[] bytes = new byte[1024];                         while (true)                         {                             int count = zipInputStream.Read(bytes, 0, bytes.Length);                             if (count > 0)                                 fileStream.Write(bytes, 0, count);                             else                             {                                 if (null != _unzipCallback)                                     _unzipCallback.OnPostUnzip(entry);                                   break;                             }                         }                     }                 }                 catch (System.Exception _e)                 {                     Debug.LogError("[ZipUtility.UnzipFile]: " + _e.ToString());                       if (null != _unzipCallback)                         _unzipCallback.OnFinished(false);                       return false;                 }             }         }           if (null != _unzipCallback)             _unzipCallback.OnFinished(true);           return true;     }       /// <summary>     /// 压缩文件     /// </summary>     /// <param name="_filePathName">文件路径名</param>     /// <param name="_parentRelPath">要压缩的文件的父相对文件夹</param>     /// <param name="_zipOutputStream">压缩输出流</param>     /// <param name="_zipCallback">ZipCallback对象，负责回调</param>     /// <returns></returns>     private static bool ZipFile(string _filePathName, string _parentRelPath, ZipOutputStream _zipOutputStream, ZipCallback _zipCallback = null)     {         //Crc32 crc32 = new Crc32();         ZipEntry entry = null;         FileStream fileStream = null;         try         {             string entryName = _parentRelPath + '/' + Path.GetFileName(_filePathName);             entry = new ZipEntry(entryName);             entry.DateTime = System.DateTime.Now;               if ((null != _zipCallback) && !_zipCallback.OnPreZip(entry))                 return true;    // 过滤               fileStream = File.OpenRead(_filePathName);             byte[] buffer = new byte[fileStream.Length];             fileStream.Read(buffer, 0, buffer.Length);             fileStream.Close();               entry.Size = buffer.Length;               //crc32.Reset();             //crc32.Update(buffer);             //entry.Crc = crc32.Value;               _zipOutputStream.PutNextEntry(entry);             _zipOutputStream.Write(buffer, 0, buffer.Length);         }         catch (System.Exception _e)         {             Debug.LogError("[ZipUtility.ZipFile]: " + _e.ToString());             return false;         }         finally         {             if (null != fileStream)             {                 fileStream.Close();                 fileStream.Dispose();             }         }           if (null != _zipCallback)             _zipCallback.OnPostZip(entry);           return true;     }       /// <summary>     /// 压缩文件夹     /// </summary>     /// <param name="_path">要压缩的文件夹</param>     /// <param name="_parentRelPath">要压缩的文件夹的父相对文件夹</param>     /// <param name="_zipOutputStream">压缩输出流</param>     /// <param name="_zipCallback">ZipCallback对象，负责回调</param>     /// <returns></returns>     private static bool ZipDirectory(string _path, string _parentRelPath, ZipOutputStream _zipOutputStream, ZipCallback _zipCallback = null)     {         ZipEntry entry = null;         try         {             string entryName = Path.Combine(_parentRelPath, Path.GetFileName(_path) + '/');             entry = new ZipEntry(entryName);             entry.DateTime = System.DateTime.Now;             entry.Size = 0;               if ((null != _zipCallback) && !_zipCallback.OnPreZip(entry))                 return true;    // 过滤               _zipOutputStream.PutNextEntry(entry);             _zipOutputStream.Flush();               string[] files = Directory.GetFiles(_path);             for (int index = 0; index < files.Length; ++index)                 ZipFile(files[index], Path.Combine(_parentRelPath, Path.GetFileName(_path)), _zipOutputStream, _zipCallback);         }         catch (System.Exception _e)         {             Debug.LogError("[ZipUtility.ZipDirectory]: " + _e.ToString());             return false;         }           string[] directories = Directory.GetDirectories(_path);         for (int index = 0; index < directories.Length; ++index)         {             if (!ZipDirectory(directories[index], Path.Combine(_parentRelPath, Path.GetFileName(_path)), _zipOutputStream, _zipCallback))                 return false;         }           if (null != _zipCallback)             _zipCallback.OnPostZip(entry);           return true;     } }

　　

作者：EnigmaJJ
链接：http://www.jianshu.com/p/acc3d79d93f7
來源：简书
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