Good tutorial on org.apache.http.client.HttpClient [closed]

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Can someone give a good suggestions of an excellent tutorial on org.apache.http.client.HttpClient

I tried this one but it does not cover a lot of details about the params etc.

http://hc.apache.org/httpclient-3.x/tutorial.html

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Apache HttpClient - Tutorial has examples using params

The following will send a post request to the URL "http://vogellac2dm.appspot.com/register" and include a parameter "registrationid" which an random value.