Zip 解压缩

  1 /// <summary>   
  2 /// Zip 压缩文件   
  3 /// </summary>   
  4 public class Zip   
  5 {   
  6     public Zip()   
  7     {   
  8            
  9     }  
 10     #region 加压方法   
 11     /// <summary>   
 12     /// 功能：压缩文件（暂时只压缩文件夹下一级目录中的文件，文件夹及其子级被忽略）   
 13     /// </summary>   
 14     /// <param name="dirPath">被压缩的文件夹夹路径</param>   
 15     /// <param name="zipFilePath">生成压缩文件的路径，为空则默认与被压缩文件夹同一级目录，名称为：文件夹名+.zip</param>   
 16     /// <param name="err">出错信息</param>   
 17     /// <returns>是否压缩成功</returns>   
 18     public static bool ZipFile(string dirPath, string zipFilePath, out string err)   
 19     {   
 20         err = "";   
 21         if (dirPath == string.Empty)   
 22         {   
 23             err = "要压缩的文件夹不能为空！";   
 24             return false;   
 25         }   
 26         if (!Directory.Exists(dirPath))   
 27         {   
 28             err = "要压缩的文件夹不存在！";   
 29             return false;   
 30         }   
 31         //压缩文件名为空时使用文件夹名＋.zip   
 32         if (zipFilePath == string.Empty)   
 33         {   
 34             if (dirPath.EndsWith("\\"))   
 35             {   
 36                 dirPath = dirPath.Substring(0, dirPath.Length - 1);   
 37             }   
 38             zipFilePath = dirPath + ".zip";   
 39         }   
 40   
 41         try  
 42         {   
 43             string[] filenames = Directory.GetFiles(dirPath);   
 44             using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath)))   
 45             {   
 46                 s.SetLevel(9);   
 47                 byte[] buffer = new byte[4096];   
 48                 foreach (string file in filenames)   
 49                 {   
 50                     ZipEntry entry = new ZipEntry(Path.GetFileName(file));   
 51                     entry.DateTime = DateTime.Now;   
 52                     s.PutNextEntry(entry);   
 53                     using (FileStream fs = File.OpenRead(file))   
 54                     {   
 55                         int sourceBytes;   
 56                         do  
 57                         {   
 58                             sourceBytes = fs.Read(buffer, 0, buffer.Length);   
 59                             s.Write(buffer, 0, sourceBytes);   
 60                         } while (sourceBytes > 0);   
 61                     }   
 62                 }   
 63                 s.Finish();   
 64                 s.Close();   
 65             }   
 66         }   
 67         catch (Exception ex)   
 68         {   
 69             err = ex.Message;   
 70             return false;   
 71         }   
 72         return true;   
 73     }  
 74     #endregion   
 75  
 76     #region 解压   
 77     /// <summary>   
 78     /// 功能：解压zip格式的文件。   
 79     /// </summary>   
 80     /// <param name="zipFilePath">压缩文件路径</param>   
 81     /// <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>   
 82     /// <param name="err">出错信息</param>   
 83     /// <returns>解压是否成功</returns>   
 84     public static bool UnZipFile(string zipFilePath, string unZipDir, out string err)   
 85     {   
 86         err = "";   
 87         if (zipFilePath == string.Empty)   
 88         {   
 89             err = "压缩文件不能为空！";   
 90             return false;   
 91         }   
 92         if (!File.Exists(zipFilePath))   
 93         {   
 94             err = "压缩文件不存在！";   
 95             return false;   
 96         }   
 97         //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   
 98         if (unZipDir == string.Empty)   
 99             unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));   
100         if (!unZipDir.EndsWith("\\"))   
101             unZipDir += "\\";   
102         if (!Directory.Exists(unZipDir))   
103             Directory.CreateDirectory(unZipDir);   
104   
105         try  
106         {   
107             using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))   
108             {   
109   
110                 ZipEntry theEntry;   
111                 while ((theEntry = s.GetNextEntry()) != null)   
112                 {   
113                     string directoryName = Path.GetDirectoryName(theEntry.Name);   
114                     string fileName = Path.GetFileName(theEntry.Name);   
115                     if (directoryName.Length > 0)   
116                     {   
117                         Directory.CreateDirectory(unZipDir + directoryName);   
118                     }   
119                     if (!directoryName.EndsWith("\\"))   
120                         directoryName += "\\";   
121                     if (fileName != String.Empty)   
122                     {   
123                         using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))   
124                         {   
125   
126                             int size = 2048;   
127                             byte[] data = new byte[2048];   
128                             while (true)   
129                             {   
130                                 size = s.Read(data, 0, data.Length);   
131                                 if (size > 0)   
132                                 {   
133                                     streamWriter.Write(data, 0, size);   
134                                 }   
135                                 else  
136                                 {   
137                                     break;   
138                                 }   
139                             }   
140                         }   
141                     }   
142                 }//while   
143             }   
144         }   
145         catch (Exception ex)   
146         {   
147             err = ex.Message;   
148             return false;   
149         }   
150         return true;   
151     }//解压结束  
152     #endregion  
153 
154 
155 本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/ZZJ_4Ever/archive/2009/03/31/4038595.aspx