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The Enterprise Edition of Java2 is a robust system composed of a series of middleware services, which makes the work of server-side application developers very simple.

The technologies included in j2ee are as follows:

Enterprise JavaBeans (EJB)

EJB defines the rules and written by server-side components, as well as how components and applications are managed and how they communicate with each other. EJB promotes the development of the component trading market, where component providers can sell reusable components.

Java Remote Method Invocation (Rmi) and RMI-IIOP

RMI allows internal communication and provides the ability to communicate with other services. RMI-IIOP is a compact extension of RMI that uses the IIOP protocol and can be integrated with Corba.

Java Naming and Directory Interface (JNDI)

JNDI identifies the location of components or other network resources.

Java Database Connectivity (JdbC)

JDBC is a bridge of relational database, which allows operation of relational database.

Java Transaction api (JTA) and Java Transaction Service (JTS)

The JTA and JTS specifications allow components to support transaction protection.

Java Messaging Service (JMS)

JMS allows distributed objects to communicate asynchronously.

Java servlets and Java Server Pages (JSPs)

Servlets and JSPs are network components that conceptually conform to request / response-oriented computing, such as communicating with the client side through the http protocol.

Java IDL.

Java IDL is a corba technology based on java implemented by sun Company. Java IDL allows application integration with other languages, as well as allows

Distributed computing based on corba.

JavaMail

The JavaMail service allows you to send platform-independent and protocol-independent E-mail messages through your java program.

Connectors

Connectors enables j2ee to integrate well with high-end applications running on mainframe systems, such as ERP.

The Extensible Markup Language (XML)

Several j2ee technologies use xml to organize and describe information, such as EJB1.1, JSP, and so on.

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