//生成的壓縮文件為test.zip
using (FileStream fsOut = File.Create("test.zip"))
{
 //ZipOutputStream類的構(gòu)造函數(shù)需要一個(gè)流，文件流、內(nèi)存流都可以，壓縮后的內(nèi)容會寫入到這個(gè)流中。
 using (ZipOutputStream zipStream = new ZipOutputStream(fsOut))
 {
  //準(zhǔn)備把G盤根目錄下的vcredist_x86.exe文件添加到壓縮包中。
  string fileName = @"G:\vcredist_x86.exe";
  FileInfo fi = new FileInfo(fileName);
  //entryName就是壓縮包中文件的名稱。
  string entryName = "vcredist_x86.exe";
  //ZipEntry類代表了一個(gè)壓縮包中的一個(gè)項(xiàng)，可以是一個(gè)文件，也可以是一個(gè)目錄。
  ZipEntry newEntry = new ZipEntry(entryName);
  newEntry.DateTime = fi.LastWriteTime;
  newEntry.Size = fi.Length;
  //把壓縮項(xiàng)的信息添加到ZipOutputStream中。
  zipStream.PutNextEntry(newEntry);
  byte[] buffer = new byte[4096];
  //把需要壓縮文件以文件流的方式復(fù)制到ZipOutputStream中。

  using (FileStream streamReader = File.OpenRead(fileName))
  {
   StreamUtils.Copy(streamReader, zipStream, buffer);
  }
  zipStream.CloseEntry();
  //添加多個(gè)文件
  //如果要壓縮一個(gè)文件夾，就是通過遍歷添加文件夾下所有的文件
  string fileName2 = @"G:\share\web.dll";
  FileInfo fi2 = new FileInfo(fileName2);

  //文件在壓縮包中的路徑
  string entryName2 = "share\\web.dll";
  ZipEntry newEntry2 = new ZipEntry(entryName2);
  newEntry2.DateTime = fi2.LastWriteTime;
  newEntry2.Size = fi2.Length;
  zipStream.PutNextEntry(newEntry2);
  byte[] buffer2 = new byte[4096];
  using (FileStream streamReader = File.OpenRead(fileName2))
  {
   StreamUtils.Copy(streamReader, zipStream, buffer2);
  }
  zipStream.CloseEntry();
  //使用流操作時(shí)一定要設(shè)置IsStreamOwner為false。否則很容易發(fā)生在文件流關(guān)閉后的異常。
  zipStream.IsStreamOwner = false;
  zipStream.Finish();
  zipStream.Close();
 }
}

//我們有一個(gè)字符串，希望直接寫入到壓縮包中的City.csv文件中。
byte[] string1 = Encoding.UTF8.GetBytes("Washington,ShangHai,TianJin,DongJing");
using (FileStream fsOut = File.Create("test1.zip"))
{
 using (ZipOutputStream zipStream = new ZipOutputStream(fsOut))
 {
  ZipEntry entry = new ZipEntry("City.csv");
  entry.DateTime = DateTime.Now;
  zipStream.PutNextEntry(entry);
  //Write方法和前面用的StreamUtils.Copy方法差不多，不過這里操作的是byte數(shù)組。
  zipStream.Write(string1, 0, string1.Length);
  zipStream.CloseEntry();
  zipStream.IsStreamOwner = false;
  zipStream.Finish();
  zipStream.Close();
 }
}

byte[] string1 = Encoding.UTF8.GetBytes("Washington,ShangHai,TianJin,DongJing");
byte[] result = null;
using (MemoryStream ms = new MemoryStream())
{
 using (ZipOutputStream zipStream = new ZipOutputStream(ms))
 {
  ZipEntry entry = new ZipEntry("City.csv");
  entry.DateTime = DateTime.Now;
  zipStream.PutNextEntry(entry);
  zipStream.Write(string1, 0, string1.Length);
  zipStream.CloseEntry();
  zipStream.IsStreamOwner = false;
  zipStream.Finish();
  zipStream.Close();
  ms.Position = 0;

  //壓縮后的數(shù)據(jù)被保存到了byte[]數(shù)組中。
  result = ms.ToArray();
 }
}

byte[] string1 = Encoding.UTF8.GetBytes("Washington,ShangHai,TianJin,DongJing");
using (FileStream fsOut = File.Create("test1.zip"))
{
 using (ZipOutputStream zipStream = new ZipOutputStream(fsOut))
 {
  //文件名變成了中文
  ZipEntry entry = new ZipEntry("城市.csv");
  entry.DateTime = DateTime.Now;
  ...
 }
}

entry.IsUnicodeText = true;