SSH three frameworks , Great God what good books recommended ~ ~ ~

I am computer software professional, this semester . NET, the next semester java, java teacher recommended we buy the core technology , but also made ​​some SSH, SSH , I want to buy the book , what book is right for me these learned SSH 's right < br> ------ Solution ----------------------------------------- ---
learning java words recommended java -based look and see servlet basis of this framework , easy look directly ssh, ssh directly at fault will result in knowledge , experience problems , but also to come back to see the underlying principles of the servlet .
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Gang 's "JAVA EE lightweight framework Struts2 + Spring + Hibernate integration "
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struts in action spring in action, those in action series are easy to understand, very practical
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this language is a lot to learn but do not mess up , Seiichi door on the good , the university gave us so when the teacher says .