/** * 解压输入的zip流，Java默认的解压只能处理UTF-8编码的文件或者目录名，否则会报MALFORMED异常 *  * @param is 输入流 * @param outputFolder 目标文件夹 * @param charset zip文件中文件和目录名称使用的编码 * @throws IOException 解压出错时抛出 */private void unzip(InputStream is, String outputFolder, Charset charset) throws IOException {    byte[] buffer = new byte[BUFFER_SIZE];    ZipInputStream zis = new ZipInputStream(new BufferedInputStream(is), charset);    ZipEntry ze = null;    while ((ze = zis.getNextEntry()) != null) {        String fileName = ze.getName();        File newFile = new File(outputFolder + File.separator + fileName);        if (ze.isDirectory()) {            newFile.mkdirs();        } else {            newFile.getParentFile().mkdirs();            FileOutputStream fos = new FileOutputStream(newFile);            BufferedOutputStream bos = new BufferedOutputStream(fos);            int len;            while ((len = zis.read(buffer)) > 0) {                bos.write(buffer, 0, len);            }            bos.close();        }    }    zis.closeEntry();    zis.close();}