java.io.IOException：尝试下载文件时，远程主机强行关闭了现有连接 [英] java.io.IOException: An existing connection was forcibly closed by the remote host when trying to download file

问题描述

我正在尝试使用Java从 https：// 网址下载文件，并且不断向我返回此错误：

I'm trying to download a file using Java from a https:// url and it keeps returning me this error:

java.io.IOException：
远程主机强行关闭了现有连接

java.io.IOException: An existing connection was forcibly closed by the remote host

这是我正在使用的代码：

Here is the code I am using:

URL website = new URL(fileUrl);
File destinationFile = new File(toPath + returnFileNameFromUrl(fileUrl));
FileUtils.copyURLToFile(website, destinationFile);

我已经尝试过这样做：

try (InputStream inputStream = website.openStream();
     ReadableByteChannel rbc = Channels.newChannel(inputStream);
     FileOutputStream fileOutputStream = new FileOutputStream(toPath + returnFileNameFromUrl(fileUrl))) {
     fileOutputStream.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
     }

但是结果是一样的。
我在做什么错了？

But the result was the same. What am I doing wrong?

我已经检查过，可以从Chrome访问URL，并且文件存在。

I already checked, the URL is accesible from Chrome and the file exists.

推荐答案

尽管IO级别较低，但它对我有效，而无需使用第三方依赖项：

Although it is a bit lower level IO, it works for me without using third party dependency:

    URL fileUrl = new URL("http://link.to/a.file");
    File dest = new File("local.file");
    try(InputStream inputStream = fileUrl.openStream();
        FileOutputStream outputStream = new FileOutputStream(dest)){
      byte[] buffer = new byte[64*1024];
      int readBytes;
      while((readBytes = inputStream.read(buffer, 0, buffer.length))!=-1){
        outputStream.write(buffer, 0, readBytes);
      }
    }

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