I have been able to get the following Matlab plugin to work with my JSON return string:
http://www.mathworks.com/matlabcentral/fileexchange/23393 (I am just copy and pasting the JSON into a file from my web browser)
However the RESTful webservice that I am hitting requires a login. I have been able to do this in java using org.apache.commons.httpclient.HttpClient; but can’t seem to find a clean way of doing this in Matlab …
Matlab allows the integration of and use of Java Classes and Methods. So if you already have the code working in Java, I’d just use that code in matlab.
Edit: If you’re dead set on using matlab then you should probably check out urlread2. Although I have no clue if you can use it to save and use session cookies.