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public static void readZipFile0(InputStream in) throws Exception {
	ZipInputStream zis = new ZipInputStream(in);
	ZipEntry entry = null;
	while ((entry = zis.getNextEntry()) != null) {
		String entryName = entry.getName();
		System.out.println(entryName);
		int size = (int) entry.getSize();
		byte[] buf = new byte[size];
		if (entry.isDirectory()) { 
			
			continue;
		}
		byte[] bs = new byte[1024];
		int len = 0;
		int off = 0;
		while ((len = zis.read(bs)) != -1) {
			System.arraycopy(bs, 0, buf, off, len);
			off += len;
		}
		FileOutputStream out = new FileOutputStream("D:/doc/"+entryName.replace("/", ""));
		out.write(buf);
		out.close();
	}
	zis.close();
}

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public static void readZipFile1(String file) throws Exception {
	ZipFile zf = new ZipFile(file);
	InputStream in = new BufferedInputStream(new FileInputStream(file));
	ZipInputStream zin = new ZipInputStream(in);
	ZipEntry ze = null;
	while ((ze = zin.getNextEntry()) != null) {
		if (ze.isDirectory()) {
			
			continue;
		}
		System.out.println(ze.getName());
		ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
		InputStream fileIn = zf.getInputStream(ze);
		int val;
		while((val=fileIn.read())!=-1) {
			byteOut.write(val);
		}
		fileIn.close();
		byteOut.writeTo(new FileOutputStream("D:/doc/"+ze.getName().replace("/", "")));
		byteOut.close();
	}
	zin.closeEntry();
	zin.close();
	in.close();
	zf.close();
}