A stack of JavaEE demo projects including JDBC, JSP, Servlet, Hibernate, Spring and Struts. And small project for micro-services.

1. JDBC (Java Database Connectivity)
2. Hibernate

 To forward requests:
 - getRequestDispatcher(url).forward(request,response)
 To redirect responses:
 - response.sendRedirect(url)

1. Context Param Elements;

<context-param> <param-name>farruhx</param-name> <param-value>hxls</param-value> </context-param> .getServletContext().getInitParameter()

2. Specific one inside servlet <init-param> </init-param> .getServletConfig().getInitParameter()

 To use EL
 - ${attribute.property}
 <%@ %> directive - To set conditions that apply to the entire JSP.
 <% %> scriplet - To insert a block of java statement.
 <%= %> expression - To display the string value of an expression.
 
 To use Session
 - HTTP is stateless protocol
 - FTP is stateful protocol
 
 To get the session
 - HttpSession session = request.getSession();
 session.setAttribute("product",product);
 
 To remove an object
 - session.removeAttribute("code")
 
 General methods of session object
 -getAttributeNames();
 -getId();
 -isNew();
 -setMaxInactiveInterval(in seconds);
 -invalidate();
 
 Thread safe
 -final Object lock = request.getSession().getId().intern();
 synchronized(lock){
 cart = (Cart) session.getAttribute("cart");
 }
 
 To create cookie
 - Cookie(name, value);
 - setMaxAge(seconds);
 - setPath(path)
 - getName();
 - setName();
 - addCookie(cookie);
 - getCookies();
 ex. response.addCookie(c);
 
 To disable EL for single page
 <%a page isELIgnored = "true" %>
 
 For the entire application(web.xml file)
 
 
 
 *.jsp
 true
 
 
 
 To disable scripting
 
 
 
 *.jsp
 true