How to use Java servlet as my backend using a Flex application?

I have developed a Flex application. I have also developed a Java servlet pr开发者_如何学编程ogram for an Access database using Tomcat. How can I use that servlet backend for my Flex application using HTTPService (or anything else)?

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Perhaps these links will be of help:

Flex with Java Servlets: how to use XML from an HttpService to populate a Data Grid(Table)
Getting Java and Flex talking via XML