Question

我写了这个方法来下载最新的Selenium Chrome驱动程序，它不起作用。它会导致损坏的.zip文件。谁能发现我的错误在哪里？

private final File CHROMEDRIVER = new File("chromedriver.exe");
private final File CHROMEDRIVERZIP = new File("chromedriver_win32.zip");
...
private void getLatestWindowsChromeDriver() {
  if ( !CHROMEDRIVER.exists() ) {   
    FileOutputStream fos;
    InputStream in;
    try {
      URL downloadUrl = new URL("http://chromedriver.storage.googleapis.com/index.html?path=2.8/chromedriver_win32.zip");
      URLConnection conn = downloadUrl.openConnection();
      in = conn.getInputStream();
      fos = new FileOutputStream( CHROMEDRIVERZIP.getAbsoluteFile() );
      byte[] b = new byte[1024];
      int count;
      while ( ( count = in.read(b) ) >= 0 ) {
        fos.write(b, 0, count);
      }
      fos.flush();
      fos.close();
      in.close();
    } catch ( FileNotFoundException e ) {
      e.printStackTrace();
    } catch ( IOException e ) {
      e.printStackTrace();
    } finally {
      if ( CHROMEDRIVERZIP.exists() ) {
        System.out.println( "Finished downloading Chrome driver zip archive: " + CHROMEDRIVERZIP.getAbsolutePath() );
      } else {
        System.out.println( "Failure to download the Chrome driver zip archive." );
      }             
    }
    if ( CHROMEDRIVERZIP.exists() ) {
      unzip( CHROMEDRIVERZIP.getAbsolutePath(), CHROMEDRIVER.getAbsolutePath(), "" );
      //CHROMEDRIVERZIP.delete();
    } else {
      throw new IllegalStateException( "Could not unzip Chrome driver.");
    }
  } else {
    System.out.println("Chrome driver was found located at: " + CHROMEDRIVER.getAbsolutePath() );
  }
}

Answer 1

您的下载网址错误。它应该是http://chromedriver.storage.googleapis.com/2.8/chromedriver_win32.zip。您正在下载网页的来源而不是zip文件。之后，假设unzip方法中没有错误，您的代码似乎可以工作;但是，我会确保你关闭finally块中的输入和输出流。我也会将循环条件更改为！= -1而不是＆gt; = 0，或者更好的是，使用Apache Commons IOUtils复制方法。

使用Java下载.zip文件会导致.zip文件损坏？

1 个答案: