Java Servlet again....some JDBC

http://www.journaldev.com/2015/servlet-interview-questions-and-answers#web-server-vs-application-server

http://www.journaldev.com/1877/java-servlet-tutorial-with-examples-for-beginners

http://www.journaldev.com/1907/java-servlet-session-management-tutorial-with-examples-of-cookies-httpsession-and-url-rewriting

http://www.ntu.edu.sg/home/ehchua/programming/java/JDBC_Basic.html#zz-1.

http://www.ntu.edu.sg/home/ehchua/programming/java/javaservletcasestudypart2.html