using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;
using System.Security.Cryptography;
namespace zip压缩与解压{
public class ZipHelper {
/// <summary> /// 压缩单个文件 /// </summary> /// <param name="fileToZip">需压缩的文件名</param> /// <param name="zipFile">压缩后的文件名（文件名都是绝对路径）</param> /// <param name="level">压缩等级（0-9）</param> /// <param name="password">压缩密码（解压是需要的密码）</param> public static void ZipFile(string fileToZip, string zipFile, int level = 5, string password = "123") {
if (!File.Exists(fileToZip)) throw new FileNotFoundException("压缩文件" + fileToZip + "不存在");
using (FileStream fs = File.OpenRead(fileToZip)) {
fs.Position = 0;
//设置流的起始位置 byte[] buffer = new byte[(int)fs.Length];
fs.Read(buffer, 0, buffer.Length);
//读取的时候设置Position，写入的时候不需要设置 fs.Close();
using (FileStream zfstram = File.Create(zipFile)) {
using (ZipOutputStream zipstream = new ZipOutputStream(zfstram)) {
zipstream.Password = md5(password);
//设置属性的时候在PutNextEntry函数之前 zipstream.SetLevel(level);
string fileName = fileToZip.Substring(fileToZip.LastIndexOf('\') + 1);
ZipEntry entry = new ZipEntry(fileName);
zipstream.PutNextEntry(entry);
zipstream.Write(buffer, 0, buffer.Length);
}
}
}
}
/// <summary> /// 压缩多个文件目录 /// </summary> /// <param name="dirname">需要压缩的目录</param> /// <param name="zipFile">压缩后的文件名</param> /// <param name="level">压缩等级</param> /// <param name="password">密码</param> public static void ZipDir(string dirname, string zipFile, int level = 5, string password = "123") {
ZipOutputStream zos = new ZipOutputStream(File.Create(zipFile));
zos.Password = md5(password);
zos.SetLevel(level);
addZipEntry(dirname, zos, dirname);
zos.Finish();
zos.Close();
}
/// <summary> /// 往压缩文件里面添加Entry /// </summary> /// <param name="PathStr">文件路径</param> /// <param name="zos">ZipOutputStream</param> /// <param name="BaseDirName">基础目录</param> private static void addZipEntry(string PathStr, ZipOutputStream zos, string BaseDirName) {
DirectoryInfo dir = new DirectoryInfo(PathStr);
foreach (FileSystemInfo item in dir.GetFileSystemInfos()) {
if ((item.Attributes & FileAttributes.Directory) == FileAttributes.Directory)//如果是文件夹继续递归 {
addZipEntry(item.FullName, zos, BaseDirName);
}
else {
FileInfo f_item = (FileInfo)item;
using (FileStream fs = f_item.OpenRead()) {
byte[] buffer = new byte[(int)fs.Length];
fs.Position = 0;
fs.Read(buffer, 0, buffer.Length);
fs.Close();
ZipEntry z_entry = new ZipEntry(item.FullName.Replace(BaseDirName, ""));
zos.PutNextEntry(z_entry);
zos.Write(buffer, 0, buffer.Length);
}
}
}
}
/// <summary> /// 解压多个文件目录 /// </summary> /// <param name="zfile">压缩文件绝对路径</param> /// <param name="dirname">解压文件目录</param> /// <param name="password">密码</param> public static void UnZip(string zfile, string dirname, string password) {
if (!Directory.Exists(dirname)) Directory.CreateDirectory(dirname);
using (ZipInputStream zis = new ZipInputStream(File.OpenRead(zfile))) {
zis.Password = md5(password);
ZipEntry entry;
while ((entry = zis.GetNextEntry()) != null) {
var strArr = entry.Name.Split('\');
//这边判断压缩文件里面是否存在目录，存在的话先创建目录后继续解压 if (strArr.Length > 2) Directory.CreateDirectory(dirname + @"" + strArr[1]);
using (FileStream dir_fs = File.Create(dirname + entry.Name)) {
int size = 1024 * 2;
byte[] buffer = new byte[size];
while (true) {
size = zis.Read(buffer, 0, buffer.Length);
if (size > 0) dir_fs.Write(buffer, 0, size);
else break;
}
}
}
}
}
private static string md5(string pwd) {
var res = "";
MD5 md = MD5.Create();
byte[] s = md.ComputeHash(Encoding.Default.GetBytes(pwd));
for (int i = 0;
i < s.Length;
i++) res = res + s[i].ToString("X");
return res;
}
}
}

static void Main(string[] args) {
var str = @"学籍导入模板.xls";
//var arr=str.Split('\');
var filePath = @"D:程序文件VS2010学习StudyProgramzip压缩与解压File学籍导入模板.xls";
//ZipHelper.ZipFile(filePath, @"D:程序文件VS2010学习StudyProgramzip压缩与解压Filetest.zip", 6, "123");
var dirPath = @"D:程序文件VS2010学习StudyProgramzip压缩与解压";
//ZipHelper.ZipDir(dirPath + @"File", dirPath + @"File.zip", 6, "huage");
ZipHelper.UnZip(dirPath + @"File.zip", dirPath + @"test", "huage");
Console.ReadKey();
}