自動下載網頁上的zip文件並自動解壓

    /**
     * 給定一個zip的url，實現zip的下載.下載到目的文件夾
     * id為用戶給定的id，方便維護
     * <p>
     * 返回zip文件的最終文件路徑
     */
    public static String downloadZIP(String[] UrlAndZipName, String fileDisDir) throws Exception {
        String strUrl = UrlAndZipName[0];
        String fileName = UrlAndZipName[1];

        URL url = new URL(strUrl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko");
        conn.connect();
        InputStream inStream = conn.getInputStream();
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        byte[] buf = new byte[1024];
        int len = 0;
        while ((len = inStream.read(buf)) != -1) {
            outStream.write(buf, 0, len);
        }
        inStream.close();
        outStream.close();

        String zippath = fileDisDir + File.separator + fileName + ".zip";
        File file = new File(zippath);
        FileOutputStream op = new FileOutputStream(file);
        op.write(outStream.toByteArray());
        op.close();

        return zippath;
    }


    /**
     * 解壓文件到指定目錄
     * 解壓后的文件名，和之前一致
     * <p>
     * 返回最終解壓的文件夾路徑
     */
    public static String unZipFiles( String zipFilePath, String descDir) throws IOException {
        File zipFile=new File(zipFilePath);
        ZipFile zip = new ZipFile(zipFile, Charset.forName("GBK"));//解決中文文件夾亂碼
        String name = zip.getName().substring(zip.getName().lastIndexOf('\\')+1, zip.getName().lastIndexOf('.'));    //此處的\\針對windows,在linux用 / ，推薦改成File.sepator

        File pathFile = new File(descDir+ File.separator+name);
        if (!pathFile.exists()) {
            pathFile.mkdirs();
        }

        for (Enumeration<? extends ZipEntry> entries = zip.entries(); entries.hasMoreElements();) {
            ZipEntry entry = (ZipEntry) entries.nextElement();
            String zipEntryName = entry.getName();
            InputStream in = zip.getInputStream(entry);
            String outPath = (descDir +File.separator+ name +File.separator+ zipEntryName).replaceAll("\\*", "/");

            // 判斷路徑是否存在,不存在則創建文件路徑
            File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));
            if (!file.exists()) {
                file.mkdirs();
            }
            // 判斷文件全路徑是否為文件夾,如果是上面已經上傳,不需要解壓
            if (new File(outPath).isDirectory()) {
                continue;
            }
            // 輸出文件路徑信息
//          System.out.println(outPath);

            FileOutputStream out = new FileOutputStream(outPath);
            byte[] buf1 = new byte[1024];
            int len;
            while ((len = in.read(buf1)) > 0) {
                out.write(buf1, 0, len);
            }
            in.close();
            out.close();
        }
        System.out.println("******************解壓完畢********************");
        return (descDir+ File.separator+name);
    }