关闭HttpURLConnection而不关闭InputStream？

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我有一个方法，打开一个 HttpURLConnection ，然后从响应中返回 InputStream 给调用者。

// 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.
我的问题是我不能在这个方法中关闭HttpURLConnection ，因为这将关闭底层的InputStream ，这个方法的调用者负责关闭。我对调用者没有控制权。
HttpUrlConnection 不被关闭的情况有多糟？它最终会被关闭吗？或者我应该实现一些机制，在一段时间后关闭它？或者复制/克隆InputStream ，并返回副本，这将使我能够关闭HttpURLConnection?


         java


         sockets


         http


         inputstream


         httpurlconnection


        1
        
        个回答


          
           
           
            Cardinal System
           
          
          
           发布于
           
           2021-06-08


          已采纳


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           你不希望让连接处于开放状态。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，当流被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();
然后只需将你的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();