Add filter to mvc configutation
Bean life cycle example link
http://stackoverflow.com/questions/11359607/understanding-basic-spring-framework-and-total-flow
web.xml vs initializer
https://www.intertech.com/Blog/how-to-use-springs-webapplicationinitializer/
http://www.baeldung.com/spring-xml-vs-java-config
https://dzone.com/articles/spring-1
http://stackoverflow.com/questions/18524524/passing-json-data-to-a-spring-mvc-controller
http://stackoverflow.com/questions/22195065/how-to-send-a-json-object-using-html-form-data
Spring Zip Link to download
https://repo.spring.io/release/org/springframework/spring/
Spring MVC