使用ICSharpCode.SharpZipLib压缩解压

添加引用

using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;

压缩解压类

    public class ZipHelper
    {
        /// 
        /// ZIP:解压一个zip文件
        /// 
        /// 需要解压的Zip文件(绝对路径)
        /// 解压到的目录
        /// 解压密码
        /// 是否覆盖已存在的文件
        public static void UnZip(string ZipFile, string TargetDirectory, string Password, bool OverWrite = true)
        {
            //如果解压到的目录不存在,则报错
            if (!System.IO.Directory.Exists(TargetDirectory))
            {
                throw new System.IO.FileNotFoundException("指定的目录: " + TargetDirectory + " 不存在!");
            }
            //目录结尾
            if (!TargetDirectory.EndsWith("\\")) { TargetDirectory = TargetDirectory + "\\"; }

            using (ZipInputStream zipfiles = new ZipInputStream(File.OpenRead(ZipFile)))
            {
                zipfiles.Password = Password;
                ZipEntry theEntry;
                System.Text.Encoding utf = GetType(ZipFile);
                ZipConstants.DefaultCodePage = utf.CodePage;
                while ((theEntry = zipfiles.GetNextEntry()) != null)
                {
                    theEntry.IsUnicodeText = true;
                    string directoryName = "";
                    string pathToZip = "";
                    pathToZip = theEntry.Name;

                    if (pathToZip != "")
                        directoryName = Path.GetDirectoryName(pathToZip) + "\\";

                    string fileName = Path.GetFileName(pathToZip);

                    Directory.CreateDirectory(TargetDirectory + directoryName);

                    if (fileName != "")
                    {
                        if ((File.Exists(TargetDirectory + directoryName + fileName) && OverWrite) || (!File.Exists(TargetDirectory + directoryName + fileName)))
                        {
                            using (FileStream streamWriter = File.Create(TargetDirectory + directoryName + fileName))
                            {
                                int size = 2048;
                                byte[] data = new byte[2048];
                                while (true)
                                {
                                    size = zipfiles.Read(data, 0, data.Length);

                                    if (size > 0)
                                        streamWriter.Write(data, 0, size);
                                    else
                                        break;
                                }
                                streamWriter.Close();
                            }
                        }
                    }
                }

                zipfiles.Close();
            }
        }

        ///  
        /// 给定文件的路径,读取文件的二进制数据,判断文件的编码类型 
        ///  
        /// 文件路径 
        /// 文件的编码类型 
        public static System.Text.Encoding GetType(string FILE_NAME)
        {
            FileStream fs = new FileStream(FILE_NAME, FileMode.Open, FileAccess.Read);
            Encoding r = GetType(fs);
            fs.Close();
            return r;
        }
        ///  
        /// 通过给定的文件流,判断文件的编码类型 
        ///  
        /// 文件流 
        /// 文件的编码类型 
        public static System.Text.Encoding GetType(FileStream fs)
        {
            byte[] Unicode = new byte[] { 0xFF, 0xFE, 0x41 };
            byte[] UnicodeBIG = new byte[] { 0xFE, 0xFF, 0x00 };
            byte[] UTF8 = new byte[] { 0xEF, 0xBB, 0xBF }; //带BOM 
            Encoding reVal = Encoding.Default;

            BinaryReader r = new BinaryReader(fs, System.Text.Encoding.Default);
            int i;
            int.TryParse(fs.Length.ToString(), out i);
            byte[] ss = r.ReadBytes(i);
            if (IsUTF8Bytes(ss) || (ss[0] == 0xEF && ss[1] == 0xBB && ss[2] == 0xBF))
            {
                reVal = Encoding.UTF8;
            }
            else if (ss[0] == 0xFE && ss[1] == 0xFF && ss[2] == 0x00)
            {
                reVal = Encoding.BigEndianUnicode;
            }
            else if (ss[0] == 0xFF && ss[1] == 0xFE && ss[2] == 0x41)
            {
                reVal = Encoding.Unicode;
            }
            r.Close();
            return reVal;

        }

        ///  
        /// 判断是否是不带 BOM 的 UTF8 格式 
        ///  
        ///  
        ///  
        private static bool IsUTF8Bytes(byte[] data)
        {
            int charByteCounter = 1;
            //计算当前正分析的字符应还有的字节数 
            byte curByte; //当前分析的字节. 
            for (int i = 0; i < data.Length; i++)
            {
                curByte = data[i];
                if (charByteCounter == 1)
                {
                    if (curByte >= 0x80)
                    {
                        //判断当前 
                        while (((curByte <<= 1) & 0x80) != 0)
                        {
                            charByteCounter++;
                        }
                        //标记位首位若为非0 则至少以2个1开始 如:110XXXXX...........1111110X  
                        if (charByteCounter == 1 || charByteCounter > 6)
                        {
                            return false;
                        }
                    }
                }
                else
                {
                    //若是UTF-8 此时第一位必须为1 
                    if ((curByte & 0xC0) != 0x80)
                    {
                        return false;
                    }
                    charByteCounter--;
                }
            }
            if (charByteCounter > 1)
            {
                throw new Exception("非预期的byte格式");
            }
            return true;
        }

        /// 
        /// 压缩单个文件
        /// 
        /// 要压缩的文件
        /// 压缩后的文件
        /// 压缩等级
        /// 每次写入大小
        public static void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize)
        {
            //如果文件没有找到,则报错
            if (!System.IO.File.Exists(fileToZip))
            {
                throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
            }

            using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
            {
                using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
                {
                    using (System.IO.FileStream StreamToZip = new System.IO.FileStream(fileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read))
                    {
                        string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);

                        ZipEntry ZipEntry = new ZipEntry(fileName);

                        ZipStream.PutNextEntry(ZipEntry);

                        ZipStream.SetLevel(compressionLevel);

                        byte[] buffer = new byte[blockSize];

                        int sizeRead = 0;

                        try
                        {
                            do
                            {
                                sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
                                ZipStream.Write(buffer, 0, sizeRead);
                            }
                            while (sizeRead > 0);
                        }
                        catch (System.Exception ex)
                        {
                            throw ex;
                        }

                        StreamToZip.Close();
                    }

                    ZipStream.Finish();
                    ZipStream.Close();
                }

                ZipFile.Close();
            }
        }

        /// 
        /// 压缩单个文件
        /// 
        /// 要进行压缩的文件名
        /// 压缩后生成的压缩文件名
        public static void ZipFile(string fileToZip, string zipedFile)
        {
            //如果文件没有找到,则报错
            if (!File.Exists(fileToZip))
            {
                throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
            }

            using (FileStream fs = File.OpenRead(fileToZip))
            {
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                fs.Close();

                using (FileStream ZipFile = File.Create(zipedFile))
                {
                    using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
                    {
                        string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);
                        ZipEntry ZipEntry = new ZipEntry(fileName);
                        ZipStream.PutNextEntry(ZipEntry);
                        ZipStream.SetLevel(5);

                        ZipStream.Write(buffer, 0, buffer.Length);
                        ZipStream.Finish();
                        ZipStream.Close();
                    }
                }
            }
        }

        /// 
        /// 压缩多层目录
        /// 
        /// The directory.
        /// The ziped file.
        public static void ZipFileDirectory(string strDirectory, string zipedFile)
        {
            using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
            {
                using (ZipOutputStream s = new ZipOutputStream(ZipFile))
                {
                    ZipSetp(strDirectory, s, "");
                }
            }
        }

        /// 
        /// 递归遍历目录
        /// 
        /// The directory.
        /// The ZipOutputStream Object.
        /// The parent path.
        private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath)
        {
            if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar)
            {
                strDirectory += Path.DirectorySeparatorChar;
            }
            Crc32 crc = new Crc32();

            string[] filenames = Directory.GetFileSystemEntries(strDirectory);

            foreach (string file in filenames)// 遍历所有的文件和目录
            {

                if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
                {
                    string pPath = parentPath;
                    pPath += file.Substring(file.LastIndexOf("\\") + 1);
                    pPath += "//";
                    ZipSetp(file, s, pPath);
                }

                else // 否则直接压缩文件
                {
                    //打开压缩文件
                    using (FileStream fs = File.OpenRead(file))
                    {

                        byte[] buffer = new byte[fs.Length];
                        fs.Read(buffer, 0, buffer.Length);

                        string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1);
                        ZipEntry entry = new ZipEntry(fileName);

                        entry.DateTime = DateTime.Now;
                        entry.Size = fs.Length;

                        fs.Close();

                        crc.Reset();
                        crc.Update(buffer);

                        entry.Crc = crc.Value;
                        s.PutNextEntry(entry);

                        s.Write(buffer, 0, buffer.Length);
                    }
                }
            }
        }

        /// 压缩文件
        /// 
        /// 待拷贝文件或文件夹 绝对路径
        ///  生成zip文件的绝对路径 
        public static void CreateZip(string sourceFilePath, string destinationZipFilePath)
        {
            if (sourceFilePath[sourceFilePath.Length - 1] != Path.DirectorySeparatorChar)
                sourceFilePath += Path.DirectorySeparatorChar;
            ZipOutputStream zipStream = new ZipOutputStream(File.Create(destinationZipFilePath));
            zipStream.SetLevel(6);  // 压缩级别 0-9
            CreateZipFiles(sourceFilePath, zipStream, sourceFilePath);

            zipStream.Finish();
            zipStream.Close();
        }

        /// 
        /// 递归压缩文件
        /// 
        /// 待压缩的文件或文件夹路径
        /// 打包结果的zip文件路径(类似 D:\WorkSpace\a.zip),全路径包括文件名和.zip扩展名
        /// 
        public static void CreateZipFiles(string sourceFilePath, ZipOutputStream zipStream, string staticFile)
        {
            if (sourceFilePath[sourceFilePath.Length - 1] != Path.DirectorySeparatorChar)
                sourceFilePath += Path.DirectorySeparatorChar;
            Crc32 crc = new Crc32();
            string[] filesArray = Directory.GetFileSystemEntries(sourceFilePath);
            foreach (string file in filesArray)
            {
                if (Directory.Exists(file))                     //如果当前是文件夹,递归
                {
                    CreateZipFiles(file, zipStream, staticFile);
                }
                else//如果是文件,开始压缩
                {
                    FileStream fileStream = File.OpenRead(file);

                    byte[] buffer = new byte[fileStream.Length];
                    fileStream.Read(buffer, 0, buffer.Length);
                    string tempFile = file.Substring(staticFile.LastIndexOf("\\") + 1);
                    ZipEntry entry = new ZipEntry(tempFile);

                    entry.DateTime = DateTime.Now;
                    entry.Size = fileStream.Length;
                    fileStream.Close();
                    crc.Reset();
                    crc.Update(buffer);
                    entry.Crc = crc.Value;
                    zipStream.PutNextEntry(entry);

                    zipStream.Write(buffer, 0, buffer.Length);
                }
            }
        }
    }

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