Java 是否关闭HttpURLConnection而不关闭InputStream？

我有一个方法，它打开一个

HttpURLConnection

，然后从响应返回

InputStream

：

// Callers are responsible for closing the returned input stream
public InputStream get()
{
    final URL url= new URL("http://example.com");
    HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection();
    httpUrlConnection.setRequestMethod("GET");
    return httpUrlConnection.getInputStream();
    
    // Don't close httpUrlConnection as that will close the returned input stream
    // which the caller is responsible for closing.
}

我的问题是，我无法在此方法中关闭

HttpURLConnection

，因为这将关闭基础

InputStream

，此方法的调用方负责关闭此基础

InputStream

。我无法控制打电话的人

---

HttpUrlConnection

没有关闭有多糟糕？它最终会关闭吗？或者我应该实施某种机制在一段时间后关闭它？或者复制/克隆

InputStream

并返回副本，这将允许我关闭

HttpURLConnection

？

您不想让连接保持打开状态。这将带来资源泄漏的风险。我建议创建一个自定义的

InputStream

实现，在流关闭时自动关闭连接：

public class HttpURLConnectionInputStream extends InputStream {

    private HttpURLConnection connection;
    private InputStream stream;

    public HttpURLConnectionInputStream(HttpURLConnection connection) throws IOException {
        this.connection = connection;
        this.stream = connection.getInputStream();
    }

    @Override
    public int read() throws IOException {
        return stream.read();
    }

    @Override
    public void close() throws IOException {
        connection.disconnect();
    }
}

然后将您的

HttpURLConnection

传递给构造函数并返回自定义输入流：

public InputStream get() throws IOException {
    final URL url = new URL("http://example.com");
    HttpURLConnection httpUrlConnection = (HttpURLConnection) url.openConnection();
    httpUrlConnection.setRequestMethod("GET");
    httpUrlConnection.connect();
    return new HttpURLConnectionInputStream(httpUrlConnection);
}

---

谢谢，对于close方法，我们是否也应该先关闭输入流？例如@Override public void close（）抛出IOException{inputStream.close（）；httpUrlConnection.disconnect（）；}@Rory我正在看JavaDoc，老实说，我不能肯定。两者都做当然没什么坏处。也许每个人都有自己的尝试捕捉？