读取zip内容

我近期做的一个软件的更新功能 备份下 :-)

        URL url = new URL(path+"/test.zip");
        HttpURLConnection httpConnection = (HttpURLConnection) url.
                                           openConnection();
        int responseCode = httpConnection.getResponseCode();
        if (responseCode == 200) {
            ZipInputStream zis = new ZipInputStream(httpConnection.
                    getInputStream());
            ZipEntry zen = zis.getNextEntry();
            FileOutputStream out = null;
            byte[] c = new byte[1024];
            int slen;
            while (zen != null) {
                if (!zen.isDirectory()) {
                    if (zen.getName().endsWith(".jar")) {
                        out = new FileOutputStream("./lib/" + zen.getName());
                        log.info("开始创建"+zen.getName());
                    } else if (zen.getName().endsWith(".jasper")) {
                        out = new FileOutputStream("./templet/" + zen.getName());
                        log.info("开始创建"+zen.getName());
                    } else if (zen.getName().endsWith(".doc")) {
                        File file = new File("./files");
                        if (!file.exists()) {
                            file.mkdir();
                        }
                        out = new FileOutputStream("./files/" + zen.getName());
                        log.info("开始创建"+zen.getName());
                    }
                    while ((slen = zis.read(c, 0, c.length)) != -1) {
                        out.write(c, 0, slen);
                    }
                    out.close();
                }
                zen = zis.getNextEntry();
            }
            zis.close();
        }