C#压缩与解压缩GZip通用类 

  注意，事先需要引入ICSharpCode.SharpZipLib.dll，该dll在网上到处都有，下载即可
  1 using System;
  2 using System.Collections.Generic;
  3 using System.Text;
  4 using System.IO;
  5 using ICSharpCode.SharpZipLib.Zip;
  6 using System.Threading;
  7 
  8 namespace lpUpdate
  9 {
 10     class GZip
 11     {
 12         ///  <summary> 
 13         /// 打包文件 
 14         ///  </summary> 
 15         ///  <param name="filenames">要打包的文件列表 </param> 
 16         ///  <param name="GzipFileName">目标文件名 </param> 
 17         ///  <param name="CompressionLevel">压缩品质级别（0~9） </param> 
 18         ///  <param name="SleepTimer">休眠时间（单位毫秒） </param> 
 19         public static void DoZip(List<FileInfo> filenames, string GzipFileName, int CompressionLevel, int SleepTimer)
 20         {
 21 
 22             ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName));
 23             try
 24             {
 25                 s.SetLevel(CompressionLevel);   //0 - store only to 9 - means best compression 
 26 
 27                 foreach (FileInfo file in filenames)
 28                 {
 29                     FileStream fs = null;
 30                     try
 31                     {
 32                         fs = file.Open(FileMode.Open, FileAccess.ReadWrite);
 33                     }
 34                     catch
 35                     { continue; }
 36 
 37                     byte[] buffer = new byte[fs.Length];
 38                     fs.Read(buffer, 0, buffer.Length);
 39 
 40                     ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name));
 41                     entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime);
 42 
 43                     s.PutNextEntry(entry);
 44 
 45                     s.Write(buffer, 0, buffer.Length);
 46 
 47 
 48                     fs.Close();
 49                     file.Delete();
 50 
 51                     if (SleepTimer > 10)
 52                         Thread.Sleep(SleepTimer);
 53                 }
 54             }
 55             finally
 56             {
 57                 s.Finish();
 58                 s.Close();
 59             }
 60         }
 61         ///  <summary> 
 62         /// 打包文件 
 63         ///  </summary> 
 64         ///  <param name="filenames">要打包的文件列表 </param> 
 65         ///  <param name="GzipFileName">目标文件名 </param> 
 66         ///  <param name="CompressionLevel">压缩品质级别（0~9） </param> 
 67         ///  <param name="SleepTimer">休眠时间（单位毫秒） </param> 
 68         public static void DoZip(List<string> filenames, string GzipFileName, int CompressionLevel, int SleepTimer)
 69         {
 70             ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName));
 71             try
 72             {
 73                 s.SetLevel(CompressionLevel);   //0 - store only to 9 - means best compression 
 74 
 75                 foreach (string filename in filenames)
 76                 {
 77                     FileInfo file = new FileInfo(filename);
 78                     FileStream fs = null;
 79                     try
 80                     {
 81                         fs = file.Open(FileMode.Open, FileAccess.ReadWrite);
 82                     }
 83                     catch
 84                     { continue; }
 85 
 86                     byte[] buffer = new byte[fs.Length];
 87                     fs.Read(buffer, 0, buffer.Length);
 88 
 89                     ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name));
 90                     entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime);
 91 
 92                     s.PutNextEntry(entry);
 93 
 94                     s.Write(buffer, 0, buffer.Length);
 95 
 96 
 97                     fs.Close();
 98                     file.Delete();
 99 
100                     if (SleepTimer > 10)
101                         Thread.Sleep(SleepTimer);
102                 }
103             }
104             finally
105             {
106                 s.Finish();
107                 s.Close();
108             }
109         }
110         ///  <summary> 
111         /// 解压缩文件 
112         ///  </summary> 
113         ///  <param name="GzipFile">压缩包文件名 </param> 
114         ///  <param name="dPath">解压路径 </param> 
115         public static void UnZip(string GzipFile, string dPath)
116         {
117             ZipInputStream s = new ZipInputStream(File.OpenRead(GzipFile));
118 
119             string directoryName = Path.GetDirectoryName(dPath + "\\") + "\\";
120 
121             if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);//生成解压目录 
122             string CurrentDirectory = directoryName;
123 
124             byte[] data = new byte[2048];
125             int size = 2048;
126 
127             ZipEntry theEntry = null;
128             FileStream streamWriter = null;
129             while ((theEntry = s.GetNextEntry()) != null)
130             {
131                 if (theEntry.IsDirectory)
132                 {// 该结点是目录 
133                     if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name);
134                 }
135                 else
136                 {
137                     if (theEntry.Name != String.Empty)
138                     {
139                         //解压文件到指定的目录 
140                         streamWriter = File.Create(CurrentDirectory + theEntry.Name);
141                         while (true)
142                         {
143                             size = s.Read(data, 0, data.Length);
144                             if (size <= 0) break;
145 
146                             streamWriter.Write(data, 0, size);
147                         }
148                         streamWriter.Close();
149                     }
150                 }
151             }
152             s.Close();
153         } 
154     }
155 }

posted on 2012-05-16 10:13  comcyd  阅读(539)  评论(0)    收藏  举报

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