java - 如何使用 java 从 URL 下载 .zip 文件

Question

这个问题已经有答案了:

Download file from server in java (2 个回答)

已关闭 4 年前。

伙计们!我有个问题!我正在尝试使用以下代码从 Internet 下载 .zip(大小为 150 mb)文件:

public void downloadBuild(String srcURL, String destPath, int bufferSize, JTextArea debugConsole) throws FileNotFoundException, IOException {
    debugConsole.append(String.format("**********Start process downloading file. URL: %s**********\n", srcURL));
    try {
        URL url = new URL(srcURL);
        HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
        httpConn.setRequestMethod("POST");
        httpConn.connect();
        in = httpConn.getInputStream();
        out = new FileOutputStream(destPath);
        byte buffer[] = new byte[bufferSize];
        int c = 0;
        while ((c = in.read(buffer)) > 0) {
            out.write(buffer, 0, c);
        }
        out.flush();
        debugConsole.append(String.format("**********File. has been dowloaded: Save path is: %s********** \n", destPath));
    } catch (IOException e) {
        debugConsole.append(String.format("**********Error! File was not downloaded. Detail: %s********** \n", e.toString()));
    } finally {
        try {
            if (out != null) {
                out.close();
            }
            if (in != null) {
                in.close();
            }
        } catch (IOException ex) {
        }
    }
}

但文件未完全下载。 (只有 4000 字节)。我究竟做错了什么？

Answer 1

您可以使用以下代码从给定的 uri 路径下载并解压 zip 文件。

        URL url = new URL(uriPath);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");
        InputStream in = connection.getInputStream();
        ZipInputStream zipIn = new ZipInputStream(in);
        ZipEntry entry = zipIn.getNextEntry();

        while(entry != null) {

            System.out.println(entry.getName());
            if (!entry.isDirectory()) {
                // if the entry is a file, extracts it
                System.out.println("===File===");

            } else {
                System.out.println("===Directory===");
            }
            zipIn.closeEntry();
            entry = zipIn.getNextEntry();

        }