This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
You could use the Jakarta Commons HttpClient, which is a very useful library for HTTP networking in Java. Another, perfectly valid option, would be to write your own "HTTP POST sender" by Googling for some samples.