[JSP] - frequently-used skills

Today I took use of JSP to create login page and loginFailed page for my project. Google is not absent again. I have not been approaching this for very long time, but they are basics and will become useful
one day.

1. Already defined variables

So you don't need to define again. But if you define your own variables with same name you will get duplicated variable exception at runtime.

session, request and response. I know only these 3...

2. Redirect in JSP

<%
response.sendRedirect (request.getContextPath () + "/login.jsp");
%>

3. Context path

I must google when I want to use it every time...

And this time I want me to remember more than this.

<%
request.getRequestURI() = request.getContextPath() + request.getServletPath()
%>

4. Checking if user has login (with security realm authentication)

To be continued ......