Converting from HttpClient 3 to 4

问题

I've managed to make changes to everything but the following:

HttpClient client;
HttpPost method;   
client = new DefaultHttpClient();
method = new HttpPost(url); 

InputStream rstream;
try {
    rstream = method.getResponseBodyAsStream();
} catch (IOException e) {
    return BadSpot(e.getMessage()); 
}

What I'm not sure of is what I should replace getResponseBodyAsStream() with.

回答1:

InputStream rstream;
try {
    HttpResponse response = client.execute(HttpHost, method);
    rstream = response.getEntity().getContent();
} catch (IOException e) {
    return BadSpot(e.getMessage()); 
}

above should do what you are asking.

回答2:

HttpResponse.getEntity(), followed by HttpEntity.getContent()

回答3:

The util class has some helpful methods:

EntityUtils.toString(response.getEntity());

There is also some useful stuff in the examples at apache's website

回答4:

Use EntityUtils and check the returned entity to be not null before consuming the entity:

InputStream rstream;
try {
    HttpResponse response = client.execute(HttpHost, method);

    rstream = Optional.ofNullable(httpResponse.getEntity())
    .map(e -> response.getContent()).orElse(null);

} catch (IOException e) {
    return BadSpot(e.getMessage()); 
}

NOTE: the InputStream here can be null and most of all you have to ensure that it's consumed before you actually close the response/release the connection.

来源：https://stackoverflow.com/questions/4598911/converting-from-httpclient-3-to-4