自动关闭HttpURLConnection与JAVA中的数据库连接（使用try-with-resourse）相同

Question

Auto closing HttpURLConnection (same as DB Connection using try-with-resourse) here i am looking for closing HttpURLConnection,without closing manually ex:urlConnection.disconnect(); in finally block

Answer 1

It's not exactly the same, but you can write a wrapper class for Autocloseable that kind of does it for you.

class AutocloseWrapper<T> implements Autocloseable {
    T wrapped;
    Consumer<T> closeMethod;
    public AutocloseWrapper(T wrapped, Consumer<T> closeMethod) {
        this.wrapped = wrapped; this.closeMethod = closeMethod;
    }
    public void close() {
        closeMethod.accept(wrapped);
    }
}

And you'd call that with

private void yourMethod() {
    HttpUrlConnection connection = createConnection();
    try (AutocloseWrapper wrapper = new AutocloseWrapper(connection, HttpUrlConnection::disconnect)) {
        // do your stuff with the connection
    }
    // connection.disconnect() will have been called here
}