当我使用函数查询 InputStream 然后 return 它时，它自动关闭

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return 一个关闭的输入流，但是在这个函数内部，输入流没有关闭。为什么？

Answer 1

您应该在断开连接之前从输入流中读取数据，因为它会关闭关联的流。

您可以使用此代码在关闭连接之前读取响应。

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();
}

当我使用函数查询 InputStream 然后 return 它时，它自动关闭

When I use a function to query an InputStream and then return it, it automatically closed

android

inputstream