java生成的压缩包损坏 java下载zip报损坏

我写了这个方法来下载最新的Selenium Chrome驱动程序，它不起作用。它导致损坏的.zip文件。任何人都可以发现我的错误在哪里？使用Java下载.zip文件会导致损坏的.zip文件？

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());
}
}

+0

什么是'unzip()'方法？ –

+0

是否抛出异常？当没有注释掉CHROMEDRIVERZIP.delete()方法时，注释方法是否成功？ –

+0

我强烈建议通过不同的方法下载文件。

请参阅：http://stackoverflow.com/questions/921262/how-to-download-and-save-a-file-from-internet-using-java此链接还显示一种类似于你的方法。看起来你的in.read()应该检查-1而不是0. –