[移动开发]Zip压缩帮助类

/// <summary>
    /// Zip压缩帮助类
    /// </summary>
    public class ZipHelper
    {
        /// <summary>
        /// 多个上传文件
        /// </summary>
        /// <param name="mm"></param>
        /// <returns></returns>
        public static UploadModel UploadFiles(UploadRequestModel mm)
        {
            string filePath = "";
            //上传附件先不删除之前的文件
            //DeleteDirAllFile(Directory.GetCurrentDirectory() + $"/UploadFile/{mm.id}/{DateTime.Now.Year}/");
            //DeleteDirAllFile(Directory.GetCurrentDirectory() + $"/UploadFile/{mm.id}/");
            var currentDate = DateTime.Now;
            List<string> result = new List<string>();
            var webRootPath = Directory.GetCurrentDirectory();//获取项目路径

            if (mm.flag == (int)UpLoadType.报送表)
            {
                //filePath = $"/UploadFile/{mm.guid}/report/{DateTime.Now.Year}/";
                filePath = $"/UploadFile/{mm.guid}/report/";
            }
            if (mm.flag == (int)UpLoadType.调查报告表)
            {
                //filePath = $"/UploadFile/{mm.guid}/investigation/{DateTime.Now.Year}/";
                filePath = $"/UploadFile/{mm.guid}/investigation/";
            }

            //创建每日存储文件夹
            if (!Directory.Exists(webRootPath + filePath))
            {
                Directory.CreateDirectory(webRootPath + filePath);
            }
            if (mm.files != null && mm.files.Count > 0)
            {
                foreach (var item in mm.files)     //上传选定的文件列表
                {
                    if (item != null)
                    {
                        //文件后缀
                        var fileExtension = Path.GetExtension(item.FileName);//获取文件格式，拓展名
                        //var saveName = item.FileName;
                        
                        //上传文件按照时间戳重新命名
                        var name = item.FileName.Substring(0, item.FileName.LastIndexOf('.'));
                        var saveName = name + "_" + currentDate.ToString("yyyyMMddHHmmss") + fileExtension;
                        var fileSize = item.Length;

                        //判断文件大小
                        if (fileSize > 1024 * 1024 * 10) //10M TODO:(1mb=1024X1024b)
                        {
                            return new UploadModel { isSuccess = false, msg = $"上传失败，文件【{saveName}】大小超过范围" };
                        }

                        //文件保存
                        using (var fs = System.IO.File.Create(webRootPath + filePath + saveName))
                        {
                            item.CopyTo(fs);
                            fs.Flush();
                        }
                        //完整的文件路径
                        var completeFilePath = Path.Combine(filePath, saveName);
                        result.Add(completeFilePath);
                    }
                }
            }
            else
            {
                return new UploadModel { isSuccess = false, msg = "上传失败，未检测上传的文件信息~" };
            }
            return new UploadModel { isSuccess = true, msg = "上传成功", completeFilePath = result };
        }

        #region 1.压缩该文件夹下的所有文件
        /// <summary>
        /// 压缩文件夹(压缩该文件夹下的所有文件)
        /// </summary>
        /// <param name="dirToZip"></param>
        /// <param name="zipedFileName"></param>
        /// <param name="compressionLevel">压缩率0（无压缩）9（压缩率最高）</param>
        public static Tuple<bool,string> ZipDir(string dirToZip, string zipedFileName, int compressionLevel = 5)
        {
            try
            {
                if (Path.GetExtension(zipedFileName) != ".zip")
                {
                    zipedFileName = zipedFileName + ".zip";
                }
                Hashtable fileList = GetAllFies(dirToZip);
                if (fileList == null)
                {
                    return new Tuple<bool, string>(false, "目录不存在或者已删除");
                }
                if (fileList != null && fileList.Count > 0)
                {
                    using (var zipoutputstream = new ZipOutputStream(System.IO.File.Create(zipedFileName)))
                    {
                        zipoutputstream.SetLevel(compressionLevel);
                        Crc32 crc = new Crc32();
                        //fileList = GetAllFies(dirToZip);
                        foreach (DictionaryEntry item in fileList)
                        {
                            FileStream fs = new FileStream(item.Key.ToString(), FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                            byte[] buffer = new byte[fs.Length];
                            fs.Read(buffer, 0, buffer.Length);
                            // ZipEntry entry = new ZipEntry(item.Key.ToString().Substring(dirToZip.Length + 1));
                            ZipEntry entry = new ZipEntry(Path.GetFileName(item.Key.ToString()))
                            {
                                DateTime = (DateTime)item.Value,
                                Size = fs.Length
                            };
                            fs.Close();
                            crc.Reset();
                            crc.Update(buffer);
                            entry.Crc = crc.Value;
                            zipoutputstream.PutNextEntry(entry);
                            zipoutputstream.Write(buffer, 0, buffer.Length);
                        }
                    }
                }
                return new Tuple<bool, string>(true,"压缩成功");
            }            
            catch (Exception ex)
            {
                return new Tuple<bool, string>(false, $"压缩失败：{ex.Message}");
            }
        }
        #endregion

        #region 2.压缩文件夹或者文件
        /// <summary>
        /// 压缩多个目录或文件
        /// </summary>
        /// <param name="folderOrFileList">待压缩的文件夹或者文件，全路径格式,是一个集合</param>
        /// <param name="zipedFile">压缩后的文件名，全路径格式</param>
        /// <param name="level">压缩等级</param>
        /// <param name="password">压宿密码</param>
        /// <returns></returns>
        public static Tuple<bool, string> ZipManyFilesOrDictorys(IEnumerable<string> folderOrFileList, string zipedFile, int level = 6, string password = "")
        {
            try
            {
                bool res = true;
                using (var s = new ZipOutputStream(File.Create(zipedFile)))
                {
                    s.SetLevel(level);
                    if (!string.IsNullOrEmpty(password))
                    {
                        s.Password = password;
                    }
                    foreach (string fileOrDir in folderOrFileList)
                    {
                        //是文件夹
                        if (Directory.Exists(fileOrDir))
                        {
                            res = ZipFileDictory(fileOrDir, s, "");
                        }
                        else
                        {
                            //文件
                            res = ZipFileWithStream(fileOrDir, s);
                        }
                    }
                    s.Finish();
                    s.Close();
                    return new Tuple<bool, string>(res, "压缩成功");
                }
            }
            catch (Exception ex)
            {
                return new Tuple<bool, string>(false, $"压缩失败：{ex.Message}");
            }            
        }


        /// <summary>
        /// 递归压缩文件夹方法
        /// </summary>
        /// <param name="folderToZip"></param>
        /// <param name="s"></param>
        /// <param name="parentFolderName"></param>
        private static bool ZipFileDictory(string folderToZip, ZipOutputStream s, string parentFolderName)
        {           
            bool res = true;
            ZipEntry entry = null;
            FileStream fs = null;
            Crc32 crc = new Crc32();
            try
            {
                //创建当前文件夹
                entry = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/")); //加上 “/” 才会当成是文件夹创建                
                //entry = new ZipEntry(parentFolderName); //加上 “/” 才会当成是文件夹创建                
                s.PutNextEntry(entry);
                s.Flush();
                //先压缩文件，再递归压缩文件夹
                var filenames = Directory.GetFiles(folderToZip);
                foreach (string file in filenames)
                {
                    //打开压缩文件
                    fs = File.OpenRead(file);
                    byte[] buffer = new byte[fs.Length];
                    fs.Read(buffer, 0, buffer.Length);
                    entry = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/" + Path.GetFileName(file)));
                    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);
                }
            }
            catch(Exception ex)
            {
                res = true;
            }
            finally
            {
                if (fs != null)
                {
                    fs.Close();
                }
                if (entry != null)
                {
                }
                GC.Collect();
                GC.Collect(1);
            }
            var folders = Directory.GetDirectories(folderToZip);
            foreach (string folder in folders)
            {
                if (!ZipFileDictory(folder, s, Path.Combine(parentFolderName, Path.GetFileName(folderToZip))))
                {
                    return false;
                }
            }
            return res;
        }

        /// <summary>
        /// 带压缩流压缩单个文件
        /// </summary>
        /// <param name="fileToZip">要进行压缩的文件名</param>
        /// <param name="zipStream"></param>
        /// <returns></returns>
        private static bool ZipFileWithStream(string fileToZip, ZipOutputStream zipStream)
        {
            //如果文件没有找到，则报错
            if (!File.Exists(fileToZip))
            {
                throw new FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
            }
            //FileStream fs = null;
            FileStream zipFile = null;
            ZipEntry zipEntry = null;
            bool res = true;
            try
            {
                zipFile = File.OpenRead(fileToZip);
                byte[] buffer = new byte[zipFile.Length];
                zipFile.Read(buffer, 0, buffer.Length);
                zipFile.Close();
                zipEntry = new ZipEntry(Path.GetFileName(fileToZip));
                zipStream.PutNextEntry(zipEntry);
                zipStream.Write(buffer, 0, buffer.Length);
            }
            catch
            {
                res = false;
            }
            finally
            {
                if (zipEntry != null)
                {
                }

                if (zipFile != null)
                {
                    zipFile.Close();
                }
                GC.Collect();
                GC.Collect(1);
            }
            return res;

        }
        #endregion

        /// <summary>
        /// 删除文件夹下的所有文件
        /// </summary>
        /// <param name="dirRoot"></param>
        public static void DeleteDirAllFile(string dirRoot)
        {
            DirectoryInfo aDirectoryInfo = new DirectoryInfo(Path.GetDirectoryName(dirRoot));
            if (aDirectoryInfo.Exists)
            {
                FileInfo[] files = aDirectoryInfo.GetFiles("*.*", SearchOption.AllDirectories);
                foreach (FileInfo f in files)
                {
                    System.IO.File.Delete(f.FullName);
                }
            }
        }

        /// <summary>  
        /// 获取所有文件  
        /// </summary>  
        /// <returns></returns>  
        private static Hashtable GetAllFies(string dir)
        {
            Hashtable filesList = new Hashtable();
            DirectoryInfo fileDire = new DirectoryInfo(dir);
            if (!fileDire.Exists)
            {
                return null;
            }
            GetAllDirFiles(fileDire, filesList);
            GetAllDirsFiles(fileDire.GetDirectories(), filesList);
            return filesList;
        }

        /// <summary>  
        /// 获取一个文件夹下的文件  
        /// </summary>  
        /// <param name="dir">目录名称</param>
        /// <param name="filesList">文件列表HastTable</param>  
        public static void GetAllDirFiles(DirectoryInfo dir, Hashtable filesList)
        {
            foreach (FileInfo file in dir.GetFiles("*.*"))
            {
                filesList.Add(file.FullName, file.LastWriteTime);
            }
        }

        /// <summary>  
        /// 获取一个文件夹下的所有文件夹里的文件  
        /// </summary>  
        /// <param name="dirs"></param>  
        /// <param name="filesList"></param>  
        public static void GetAllDirsFiles(IEnumerable<DirectoryInfo> dirs, Hashtable filesList)
        {
            foreach (DirectoryInfo dir in dirs)
            {
                foreach (FileInfo file in dir.GetFiles("*.*"))
                {
                    filesList.Add(file.FullName, file.LastWriteTime);
                }
                GetAllDirsFiles(dir.GetDirectories(), filesList);
            }
        }

    }

    /// <summary>
    /// 上传附件返回model
    /// </summary>
    public class UploadModel
    {
        public bool isSuccess { get; set; }
        public string msg { get; set; }
        public List<string> completeFilePath { get; set; } = new List<string>();
    }

    /// <summary>
    /// 上传附件请求model
    /// </summary>
    public class UploadRequestModel
    {
        public List<IFormFile> files { get; set; }
        public int id { get; set; }
        /// <summary>
        /// 操作类型 1报表  2报告表
        /// </summary>
        public int flag { get; set; }
        /// <summary>
        /// 绑定批量上传的唯一ID
        /// </summary>
        public string guid { get; set; }
    }

调用

        [HttpPost]
        [ModuleInfo]
        [Description("读取数据")]
        public IActionResult UploadFiles([FromForm] UploadRequestModel req)
        {
            try
            {
                if (string.IsNullOrWhiteSpace(req.guid))
                {
                    return ReturnJson(false, EERRORINFO.无, "guid不能为空");
                }
                UploadModel model = ZipHelper.UploadFiles(req);
                if (model.isSuccess)
                {
                    //上传成功，数据库修改路径
                    //_accidentLogic.AddOrUpdateReportAttachments(new AddOrUpdateReportAttachmentsModel()
                    //{
                    //    Id = req.id,
                    //    AttachmentsPath = string.Join(";", model.completeFilePath),
                    //});
                }
                string url = AppSettingsReader.GetValue<string>("AccidentReportingURL") + $"{model.completeFilePath?[0].ToString()}";
                List<object> objList = new List<object>();
                objList.Add(new
                {
                    result = model.isSuccess,
                    url = url,
                    createTime = DateTime.Now,
                });
                //var obj = new { result = model.isSuccess, url = url };
                return ReturnJson(objList, EERRORINFO.无, model.msg);
            }
            catch (Exception ex)
            {
                string json = JsonConvert.SerializeObject(req);
                return ReturnJson(null, EERRORINFO.无, $"批量上传附件异常,请求接口[UploadFiles],请求参数{json},错误消息：{ex.Message}-----------错误位置：{ex.StackTrace}");
            }
        }

       
        [HttpPost]
        [ModuleInfo]
        [Description("读取数据")]
        public IActionResult CreateZIPFile(UploadRequestModel req)
        {
            try
            {
                if (string.IsNullOrWhiteSpace(req.guid))
                {
                    return ReturnJson(false, EERRORINFO.无, "guid不能为空");
                }
                
                //报送表和调查报告表压缩成一个zip
                string filePath = Directory.GetCurrentDirectory() + $"/UploadFile/{req.guid}/";

                //报送表和调查报告单独压缩
                //if (req.flag == (int)UpLoadType.报送表)
                //{
                //    filePath = Directory.GetCurrentDirectory() + $"/UploadFile/{req.guid}/report/";
                //}
                //if (req.flag == (int)UpLoadType.调查报告表)
                //{
                //    filePath = Directory.GetCurrentDirectory() + $"/UploadFile/{req.guid}/investigation/";
                //}

                string zipFileName = $"{req.guid}-{DateTime.Now:yyyyMMddHHmmss}.zip";
                string destinationPath = filePath + zipFileName;

                //压缩文件
                var folderOrFileList = new List<string>()
                {
                    Directory.GetCurrentDirectory() + $"/UploadFile/{req.guid}/"
                };
                Tuple<bool, string> result = ZipHelper.ZipManyFilesOrDictorys(folderOrFileList, destinationPath);
                //var obj = new { result = result.Item1 };
                //return ReturnJson(obj, EERRORINFO.无, result.Item2);

                //压缩失败
                if (result.Item1 == false)
                {
                    return ReturnJson(false, EERRORINFO.无, result.Item2);
                }

                //下载文件
                return File(new FileStream(destinationPath, FileMode.Open), "application/octet-stream", zipFileName);
            }
            catch (Exception ex)
            {
                string json = JsonConvert.SerializeObject(req);
                return ReturnJson(null, EERRORINFO.无, $"压缩文件异常,请求接口[UploadFiles],请求参数{json},错误消息：{ex.Message}-----------错误位置：{ex.StackTrace}");
            }
        }