学步园

package common;

import java.io.*;
import org.apache.tools.zip.*;


public class Zip
{	
	private static void zipDirectory(ZipOutputStream zos, String dirName,
			String basePath) throws Exception
	{
		File dir = new File(dirName);
		if (dir.exists())
		{
			File files[] = dir.listFiles();

			if (files.length > 0)
			{
				for (File file : files)
				{

					if (file.isDirectory())
					{
						zipDirectory(zos, file.getPath(), basePath
								+ file.getName().substring(
										file.getName().lastIndexOf(
												File.separator) + 1)
								+ File.separator);
					}
					else
						zipFile(zos, file.getPath(), basePath);
				}
			}
			else
			{
				ZipEntry ze = new ZipEntry(basePath);
				zos.putNextEntry(ze);
			}
		}
	}

	private static void  zipFile(ZipOutputStream zos, String filename,
			String basePath) throws Exception
	{
		File file = new File(filename);
     
		if (file.exists())
		{
			
			FileInputStream fis = new FileInputStream(filename);
			ZipEntry ze = new ZipEntry(basePath + file.getName());

			zos.putNextEntry(ze);
			byte[] buffer = new byte[8192];
			int count = 0;
			while ((count = fis.read(buffer)) > 0)
			{
				zos.write(buffer, 0, count);
			}
			fis.close();					
		}
	}

	public static void compress(String zipFilename, String... paths)
			throws Exception
	{
		compress(new FileOutputStream(zipFilename), paths);

	}

	public static void  compress(OutputStream os, String... paths)
			throws Exception
	{
		ZipOutputStream zos = new ZipOutputStream(os);

		for (String path : paths)
		{
			if(path.equals("")) continue;
			java.io.File file = new java.io.File(path);
			if (file.exists())
			{

				if (file.isDirectory())
				{
					zipDirectory(zos, file.getPath(), file.getName() + File.separator);
				}
				else
				{
					zipFile(zos, file.getPath(), "");
				}
			}
		}
		zos.close();
	}
}

2 调用方法：

protected javax.servlet.http.HttpServletResponse response;
Zip.compress(response.getOutputStream(), names);