当我使用函数查询InputStream然后返回它时，它会自动关闭

Question

public InputStream executeQuery(String query) throws IOException {
        if(!networkTest()){
            return null;
        }
        HttpURLConnection httpURLConnection = null;


        URL url = new URL(query);
        httpURLConnection = (HttpURLConnection) url.openConnection();
        InputStream in = new BufferedInputStream(httpURLConnection.getInputStream());



        if (httpURLConnection != null) {
            httpURLConnection.disconnect();
        }
        return in;

    }

代码返回一个关闭的输入流但在此函数内部时，输入流未关闭。为什么呢？

Answer 1

在断开连接之前，您应该从输入流中读取数据，因为它会关闭相关的流。

您可以在关闭连接之前使用此代码读取响应。

public String streamToString(InputStream is) throws IOException {
    StringBuilder sb = new StringBuilder();
    BufferedReader rd = new BufferedReader(new InputStreamReader(is));
    String line;
    while ((line = rd.readLine()) != null) {
        sb.append(line);
    }
    return sb.toString();
}