压缩与解压缩类三

    /**
     * 返回需压缩目录内文件的相对路径 去除其压缩目录信息 如当前需压缩目录内文件是目录，则返回目录信息
     *
     * @param zipSrcDir 检索路径
     * @param jarfile 需压缩目录内文件
     * @return 截去之后的路径
     */
    private static String getRelativePath(final String zipSrcDir,
            final File jarfile)
    {
        String jarfileName = jarfile.getAbsolutePath();
        if (jarfile.isDirectory())
        {
            // 完善目录，windows:目录以"\"结尾
            if (!jarfileName.endsWith(File.separator))
            {
                jarfileName += File.separatorChar;
            }
        }
        int index = zipSrcDir.lastIndexOf(File.separator);
        final String newString = jarfileName.substring(index + 1);
        final String newRelativeString = newString.replaceAll("\\\\", "/");
        return newRelativeString;
    }
   
    /**
     * 根据传入的zipEntry判断是文件还是路径，如果是文件则创建文件，并将内容写入，否则创建目录
     * @param unZipdir 解压目录
     * @param zipEntry 压缩包条目
     * @param zipStream 压缩包输入流
     * @return 解压目录
     */
    private static ZipEntry createFileOrFolderByZipEntry(final String unZipdir,
            ZipEntry zipEntry, ZipInputStream zipStream)
    {
        final String relativePath = zipEntry.getName();
        final File target = new File(unZipdir, relativePath);
        final File parentFile = target.getParentFile();
        if (!parentFile.exists() && !parentFile.mkdirs())
        {
            throw new RuntimeException("create file failure");
        }
        if (false == zipEntry.isDirectory())
        {
            OutputStream out = null;
            try
            {
                out = new BufferedOutputStream(new FileOutputStream(target));
                writeFile(zipStream, out);
                out.close();
                zipEntry = zipStream.getNextEntry();
            }
            catch (final FileNotFoundException e)
            {
                e.printStackTrace();
            }
            catch (final IOException e)
            {
                e.printStackTrace();
            }
        }
        else
        {
            try
            {
                // 目录不存在则创建目录（解压后的目录）
                if (!target.exists() && !target.mkdirs())
                {
                    throw new RuntimeException("create file failure");
                }
                zipEntry = zipStream.getNextEntry();
            }
            catch (final IOException e)
            {
                e.printStackTrace();
            }
        }
        return zipEntry;
    }
}