Hi Kajal, you started another thread for a similar question here.
You might not get an answer in the struts forum so I'll move it to the forum which I feel would be appropriate for the question.
You can use an API to import contacts from hotmail. In the past I've used this API but its commercial i.e. paid. As far as I understood the windows live API, there's a very weird procedure to get contacts from it. The general steps to be followed are given here, here and here. You'll first have to do a delegate authentication. There's a sample java program given here for doing the authentication. The API Reference lists most of the information you need. That's all that I can help...