用c#做一个压缩和解压缩工具容易实现不？

简单写写用哈夫曼，想写好看看开源的zip

我靠，用这个做毕业设计？没搞错，
从网站上随便找一个算法，就实现了。
最著名的是7Z算法，连RAR和Zip都给你解压了，
现成的算法、现成的代码。

有一个开源的.NET压缩类库，听好用的。具体啥名忘记了搜索一下

压缩、解压的，前几天刚用到，贴到博客了。供参考http://hi.csdn.net/link.php?url=http://blog.csdn.net%2Fpolarissky

c#搞压缩，要是人家是win2000系统，人家下载了你的压缩软件，还得下载个framework；
下载回来吓一跳，framework是被rar压缩过的

SHARPZIP C#下的类库，可实现解、压缩！

简单点用哈夫曼算法abdcabdaaazzcda:5
b:2
c:2
d:3
z:2
      14
    0/ \1
    6   \
  0/\1   \
  4  \    8
0/\1  \  0/\1
b2 c2 z2 d3 a5 a:11
b:000
c:001
d:10
z:01abdcabdaaazzcd
11000100011100010111111010100110
=
C4717EA6

先引用ICSharpCode.SharpZipLib再public class ZipHelper
    {
        /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="filenames">文件名列表，若是文件夹以“\”结尾</param>
        /// <param name="GzipFileName">压缩文件名</param>
        /// <param name="CompressionLevel">压缩比</param>
        /// <param name="password">解压密码</param>
        public static void DoZip(List<string> filenames, string GzipFileName, int CompressionLevel,string password)
        {
            ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName));
            if (!string.IsNullOrEmpty(password))
            {
                s.Password = password;
            }
            try
            {
                s.SetLevel(CompressionLevel);
                foreach (string filename in filenames)
                {
                    //若是文件夹
                    if (filename.EndsWith("\\"))
                    {
                        doZipFolder(string.Format("{0}\\", Directory.GetParent(filename)), filename, ref s);
                    }
                    //若是文件
                    else
                    {
                        FileInfo file = new FileInfo(filename);
                        FileStream fs = null;
                        try
                        {
                            fs = file.Open(FileMode.Open, FileAccess.ReadWrite);
                        }
                        catch
                        { continue; }                        byte[] buffer = new byte[fs.Length];
                        fs.Read(buffer, 0, buffer.Length);                        ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name));
                        entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime);                        s.PutNextEntry(entry);
                        s.Write(buffer, 0, buffer.Length);                        fs.Close();
                    }
                }
            }
            finally
            {
                s.Finish();
                s.Close();
            }
        }        //递归压缩文件夹中的文件并保持文件目录结构
        private static void doZipFolder(string basePath, string fullPath, ref ZipOutputStream s)
        {
            DirectoryInfo dir = new DirectoryInfo(fullPath);
            //压缩文件
            foreach (FileInfo file in dir.GetFiles())
            {
                FileStream fs = null;
                try
                {
                    fs = file.Open(FileMode.Open, FileAccess.ReadWrite);
                }
                catch
                {
                    continue;
                }
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                ZipEntry entry = new ZipEntry(file.FullName.Replace(basePath, ""));
                entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime);
                s.PutNextEntry(entry);
                s.Write(buffer, 0, buffer.Length);
                fs.Close();
            }
            //递归压缩子文件夹
            foreach (DirectoryInfo subDir in dir.GetDirectories())
            {
                doZipFolder(basePath, subDir.FullName, ref s);
            }
        }        /// <summary>
        /// 解压缩文件
        /// </summary>
        /// <param name="GzipFile">Zip文件路径</param>
        /// <param name="dPath">解压路径</param>
        /// <param name="password">解压密码</param>
        public static void UnZip(string GzipFile, string dPath,string password)
        {
            ZipInputStream s = new ZipInputStream(File.OpenRead(GzipFile));
            if (!string.IsNullOrEmpty(password))
            {
                s.Password = password;
            }
            string directoryName = Path.GetDirectoryName(dPath + "\\") + "\\";
            if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);
            string CurrentDirectory = directoryName;
            byte[] data = new byte[2048];
            int size = 2048;
            ZipEntry theEntry = null;
            FileStream streamWriter = null;
            while ((theEntry = s.GetNextEntry()) != null)
            {
                if (theEntry.IsDirectory)
                {
                    if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name);
                }
                else
                {
                    if (theEntry.Name != String.Empty)
                    {
                        string fullName = CurrentDirectory + theEntry.Name;
                        string folder = fullName.Substring(0, fullName.LastIndexOf("\\"));
                        if (!Directory.Exists(folder))
                        {
                            Directory.CreateDirectory(folder);
                        }
                        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();
        }
    }

C# 内置了对zip的压缩解压方法。
对于rar和7z貌似可用在C#中调命令行方式完成

调试易

用c#做一个压缩和解压缩工具容易实现不？

解决方案 »