JAVA压缩/解压ZIP

使用ant.jar中的org.apache.tools.zip.*

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Enumeration;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;

public class ZipUtil {
	
	public boolean zip(String zipFilePath,String[] fromZipFileArray) throws Exception
	{
		File toZipFile = new File(zipFilePath);
		if (!toZipFile.exists())
		{
			toZipFile.createNewFile();
		}
		ZipOutputStream out = new ZipOutputStream(new FileOutputStream(toZipFile));
		for (String str : fromZipFileArray)
		{
			this.writeToZip(out, new File(str), "");
		}
		out.close();
		return true;
	}
	
	private void writeToZip(ZipOutputStream out,File fromZipFile,String base) throws Exception
	{
		if (fromZipFile.isDirectory())
		{
			for (File file : fromZipFile.listFiles())
			{
				this.writeToZip(out, file, base + fromZipFile.getName() + File.separator);
			}
		}
		else
		{
			//add this file
			this.addFileToZip(out,fromZipFile,base + fromZipFile.getName());
		}
	}
	
	private void addFileToZip(ZipOutputStream out,File file,String base) throws Exception
	{
		byte[] buff = new byte[1024];
		int bytesRead = -1;
		ZipEntry entry = new ZipEntry(base);
		out.putNextEntry(entry);
		InputStream in = new BufferedInputStream(new FileInputStream(file));
		while (-1 != (bytesRead = in.read(buff, 0, buff.length))) {
			out.write(buff, 0, bytesRead);
		}
		in.close();
		out.flush();
	}
	
	public void unzip(String zipFilePath,String unzipFilePath) throws Exception
	{
		ZipFile zipfile = new ZipFile(zipFilePath,"GB2312");
		Enumeration enu = zipfile.getEntries();
		while(enu.hasMoreElements())
		{
			ZipEntry entry = (ZipEntry)enu.nextElement();
			this.writeToDir(zipfile, entry, new File(unzipFilePath + File.separator + entry.getName()));
			
		}
	}
	
	private void writeToDir(ZipFile zip, ZipEntry entry, File toFile) throws Exception
	{
		if (!entry.isDirectory()) {
			File file = toFile.getParentFile();
			if (!file.exists())
			{
				file.mkdirs();
			}
			FileOutputStream fos = new FileOutputStream(toFile);
			byte[] buffer = new byte[1024];
			InputStream is = zip.getInputStream(entry);
			int len;
			while((len = is.read(buffer,0,buffer.length)) != -1)
			{
				fos.write(buffer,0,len);
			}
			fos.close();
		}
	}
}

调用方法

			new ZipUtil().zip("D:\\ziptest.zip", new String[]{"D:\\ziptest"});
			new ZipUtil().unzip("D:\\ziptest.zip", "E:\\");