So the thing to remember is that Spring is not an application server. I'm not going to go over why WebSphere is better than other application Servers - you would want to refer to the IBM Marketing material and competitive product office material for that. Spring is simply a framework that works within application servers. So if you want to use Spring, go ahead. What we describe is how to do RESTful development in a completely integrated environment using the JEE standards. If that interests you then great, but if not, then I'm not going to try to convince you to give up what you're doing.
I am sorry if I made you feel that I am trolling you. I really do not mean that way. I respect your hard work in writing a book .
I am not working on spring. I just wanted to know the difference between Spring and websphere in developing restful webservices, because I have read earlier that it is simple to build restful webservices using Spring. Thanks for your valuable reply . Good luck for your book