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287 lines (252 loc) · 10.4 KB
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/*
* 作用：通过 SharpZipLib 实现文件/目录压缩/解压缩。
* */
using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections.Generic;
using System.IO;
namespace Helper.Core.Library
{
#region 逻辑处理辅助枚举
internal class ZipFormat
{
public const string Zip = ".zip";
public const string Rar = ".rar";
private static List<string> formatList;
public static List<string> FormatList
{
get
{
if (formatList == null || formatList.Count == 0)
{
formatList = new List<string>()
{
Zip,
Rar
};
}
return formatList;
}
}
}
#endregion
public class ZipHelper
{
#region 私有属性常量
private const string DirectoryNotExistsException = "目录不存在";
private const string FileNotExistsException = "文件不存在";
private const string ZipFormatErrorException = "文件后缀不正确";
#endregion
#region 对外公开方法
/// <summary>
/// 压缩文件夹
/// </summary>
/// <param name="directoryPath">压缩目录</param>
/// <param name="zipPath">Zip 文件路径</param>
/// <param name="append">是否附加</param>
/// <param name="password">密码</param>
/// <param name="compressLevel">压缩等级，取值范围：0-9</param>
/// <returns></returns>
public static bool Compress(string directoryPath, string zipPath, bool append, string password = "", int compressLevel = 6)
{
// 如果目录不存在
if (!Directory.Exists(directoryPath)) throw new Exception(DirectoryNotExistsException);
directoryPath = directoryPath.Replace("/", "\\");
if (directoryPath.EndsWith("\\")) directoryPath = directoryPath.TrimEnd(new char[] { '\\' });
// 检查后缀
string suffix = FileHelper.GetSuffix(zipPath);
// 如果生成文件后缀不是 .zip|.rar，抛出异常
if (ZipFormat.FormatList.IndexOf(suffix) < 0) throw new Exception(ZipFormatErrorException);
// 创建文件目录
bool directoryResult = FileHelper.CreateDirectory(zipPath);
if (!directoryResult) return false;
if (!append)
{
if (File.Exists(zipPath)) File.Delete(zipPath);
}
bool result = false;
using (ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipPath)))
{
zipStream.SetLevel(compressLevel);
if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
result = CompressDirectory(directoryPath, zipStream);
zipStream.Finish();
}
return result;
}
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="filePath">文件地址</param>
/// <param name="zipPath">生成 Zip 路径</param>
/// <param name="password">密码</param>
/// <param name="compressLevel">压缩等级，取值范围：0-9</param>
/// <returns></returns>
public static bool Compress(string filePath, string zipPath, string password = "", int compressLevel = 6)
{
if (!File.Exists(filePath)) throw new Exception(FileNotExistsException);
ZipOutputStream zipStream = null;
FileStream fileStream = null;
ZipEntry zipEntry = null;
try
{
// 检查后缀
string suffix = FileHelper.GetSuffix(zipPath);
// 如果生成文件后缀不是 .zip|.rar，抛出异常
if (ZipFormat.FormatList.IndexOf(suffix) < 0) throw new Exception(ZipFormatErrorException);
// 创建文件目录
bool directoryResult = FileHelper.CreateDirectory(zipPath);
if (!directoryResult) return false;
fileStream = File.OpenRead(filePath);
byte[] buffer = new byte[fileStream.Length];
fileStream.Read(buffer, 0, buffer.Length);
fileStream.Close();
using (fileStream = File.Create(zipPath))
{
using (zipStream = new ZipOutputStream(fileStream))
{
if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
zipEntry = new ZipEntry(Path.GetFileName(filePath));
zipStream.PutNextEntry(zipEntry);
zipStream.SetLevel(compressLevel);
zipStream.Write(buffer, 0, buffer.Length);
}
}
return true;
}
catch
{
throw;
}
finally
{
if (zipStream != null) zipStream.Close();
if (fileStream != null) fileStream.Close();
if (zipEntry != null) zipEntry = null;
}
}
/// <summary>
/// 解压缩文件
/// </summary>
/// <param name="zipPath">Zip 路径</param>
/// <param name="directoryPath">输出目录</param>
/// <param name="password">密码</param>
/// <returns></returns>
public static bool UnCompress(string zipPath, string directoryPath, string password = "")
{
FileStream fileStream = null;
ZipInputStream zipStream = null;
ZipEntry zipEntry = null;
try
{
string suffix = FileHelper.GetSuffix(zipPath);
// 如果生成文件后缀不是 .zip|.rar，抛出异常
if (ZipFormat.FormatList.IndexOf(suffix) < 0) throw new Exception(ZipFormatErrorException);
// 如果文件不存在
if (!File.Exists(zipPath)) throw new Exception(FileNotExistsException);
// 创建输出目录
bool directoryResult = FileHelper.CreateDirectory(directoryPath, true);
if (!directoryResult) return false;
zipStream = new ZipInputStream(File.OpenRead(zipPath));
if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
string filePath = "";
while ((zipEntry = zipStream.GetNextEntry()) != null)
{
if (!string.IsNullOrEmpty(zipEntry.Name))
{
filePath = Path.Combine(directoryPath, zipEntry.Name);
filePath = filePath.Replace('/', '\\');
if (filePath.EndsWith("\\"))
{
Directory.CreateDirectory(filePath);
continue;
}
if (File.Exists(filePath)) File.Delete(filePath);
using (fileStream = File.Create(filePath))
{
int size = 1024;
byte[] data = new byte[size];
while (true)
{
size = zipStream.Read(data, 0, data.Length);
if (size > 0)
{
fileStream.Write(data, 0, data.Length);
}
else
{
break;
}
}
fileStream.Flush();
}
}
}
return true;
}
catch
{
throw;
}
finally
{
if (fileStream != null) fileStream.Close();
if (zipStream != null) zipStream.Close();
if (zipEntry != null) zipEntry = null;
}
}
#endregion
#region 逻辑处理私有方法
/// <summary>
/// 遍历压缩文件夹文件
/// </summary>
/// <param name="directoryPath"></param>
/// <param name="zipStream"></param>
/// <param name="parentDirectoryPath"></param>
/// <returns></returns>
private static bool CompressDirectory(string directoryPath, ZipOutputStream zipStream, string parentDirectoryPath = "")
{
ZipEntry zipEntry = null;
FileStream fileStream = null;
string entryDirectoryPath = "";
bool result = false;
try
{
entryDirectoryPath = Path.Combine(parentDirectoryPath, Path.GetFileName(directoryPath) + "\\");
zipEntry = new ZipEntry(entryDirectoryPath);
zipStream.PutNextEntry(zipEntry);
zipStream.Flush();
string[] filePathList = Directory.GetFiles(directoryPath);
foreach (string filePath in filePathList)
{
fileStream = File.OpenRead(filePath);
byte[] buffer = new byte[fileStream.Length];
fileStream.Read(buffer, 0, buffer.Length);
zipEntry = new ZipEntry(Path.Combine(entryDirectoryPath + Path.GetFileName(filePath)));
zipEntry.DateTime = DateTime.Now;
zipEntry.Size = fileStream.Length;
fileStream.Close();
zipStream.PutNextEntry(zipEntry);
zipStream.Write(buffer, 0, buffer.Length);
}
result = true;
}
catch
{
throw;
}
finally
{
if (zipEntry != null) zipEntry = null;
if (fileStream != null) fileStream.Close();
}
string[] childDirectoryPathList = Directory.GetDirectories(directoryPath);
foreach (string childDirectoryPath in childDirectoryPathList)
{
if (!CompressDirectory(childDirectoryPath, zipStream, entryDirectoryPath)) return false;
}
return result;
}
#endregion
}
}