How to make an HTTP POST URL connection?

Question

I am accessing a web service by an HTTP POST method as below:

But the response contains nothing. I was expecting a JSON string here. Are JSON read in a different way?

I think the best answer you can find it [here](http://stackoverflow.com/questions/2793150/how-to-use-java-net-urlconnection-to-fire-and-handle-http-requests) — Ioan, Aug 30 '13 at 08:18

Shamim Ahmmed · Answer 1 · 2013-08-30T08:11:24.050

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You can keep the type as HttpURLConnection instead of URLConnection. It allows to specify HTTP method.

HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");

edited Aug 30 '13 at 08:11

answered Aug 30 '13 at 07:56

Shamim Ahmmed

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score 0 · Answer 2 · edited May 23 '17 at 12:29

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I agree that using a HttpUtlConnection or HTTPClient is going to make you life easier, but have a look at setDoOutput

http://docs.oracle.com/javase/7/docs/api/java/net/URLConnection.html#setDoOutput(boolean)

and

What exactly does URLConnection.setDoOutput() affect?

edited May 23 '17 at 12:29

Community

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answered Aug 30 '13 at 07:58

Scary Wombat

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score 0 · Answer 3 · answered Aug 30 '13 at 07:59

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The problem is here

URLConnection connection = (HttpURLConnection)url.openConnection();

make connection an instance of HttpURLConnection

answered Aug 30 '13 at 07:59

sr01853

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score 0 · Answer 4 · answered Aug 30 '13 at 07:59

Adding to Shammiz answer

Without cast Make use of URLConnection.html#setDoOutput(boolean)

A URL connection can be used for input and/or output. Set the DoOutput flag to true if you intend to use the URL connection for output, false if not. The default is false.

Passing true, triggers post.

How to make an HTTP POST URL connection?

4 Answers4