Tools

1. Excel handling in Java: Apache POI
   http://viralpatel.net/blogs/java-read-write-excel-file-apache-poi/

2. Amazon S3
   http://aws.amazon.com/developers/getting-started/java/

3. Spring MVC forms
   http://www.mkyong.com/spring-mvc/spring-mvc-form-handling-example/
   http://docs.spring.io/spring/docs/3.0.x/reference/view.html
   http://www.tutorialspoint.com/spring/spring_mvc_form_handling_example.htm