External Documentation
From Salespoint 5
Java
Java 1.7 Javadoc
Spring MVC
Introduction to Spring Web MVC framework
Spring Taglibrary
Spring-Form Taglibrary
Using Spring's form tag library
(Spring 3 Javadoc)
(Spring Framework Reference Documentation)
Java Server Pages
Expression Language
JavaServer Pages Standard Tag Library
JPA
Introduction to the Java Persistence API
javax.persistence Javadoc
Wikibooks - Java Persistence
Joda Time
Joda Time - Java date and time API
Joda Time - JSP Taglibrary