Java EE

• It is built on Java SE platform
• It provides an API and run environment for developing and running large-scale, multi-tiered, distributed, scalable, reliable, and secure network applications. 
• JDBC
• JNDI
• EJB
• RMI
• JSP/Servlets 
• Servlet is a simple java class which can take request in and can respond back with response. 
• Jsp implictly converst to Servlet. However, it is easier to write dynamic html content in jsp rather than in Servlet 
• JSF -> It is a web framework
• JMS
• JTS
• JTA
• JavaMail

Servlets

• Servlet is a simple java class which can take request in and can respond back with response. 
• HTTPServets are servlets which can take HTTP request as input and respond with HTTP response.

JSP

• Expression Language ${name}
• It is used to dynamically pick up content from Request, Session and other things. 
• Scriplet
• Any thing one writes within <%  %>
• Any java code can be written in Scriplet
• Scriplet Expression
•  <%=    %>