Java Reference
In-Depth Information
Servlet, and that Servlet generates HTML in response to
client requests.
JSF is a Java EE technology designed to create full and rich
user
interfaces.
Standard
user
interface
components
are
created
on
the
server
and
connected
to
business
logic
components.
Custom
renderers
take
the
components
and
create the actual user interface.
JDBC is a technology that enables an application to
communicate with a data-storage. Most often that is a
relational database that stores data in tables that are linked
through logical relations between tables. JDBC provides a
common interface that allows you to communicate with the
database through a standard interface without needing to learn
the syntax of a particular database.
EJBs are the centerpiece of Java EE and are the component
model for building the business rules logic in a Java EE
application. EJBs can be designed to maintain state during a
conversation with a client or it can be stateless. They can also
be designed to be short-lived and ephemeral, or can be
persisted for later use. EJBs can also be designed to listen to
message queues and respond to specific messages. Java EE is
about
a
lot
more
than
EJBs,
although
EJBs
do
play
a
prominent role.
The Java EE platform provides a number of services beyond
the component hosting of Servlets, JSPs, and EJBs.
Fundamental services include support for XML, web services,
transactions, and security.
