The J2EE Specification

 

Sun Microsystems' Java 2 Platform, Enterprise Edition (J2EE), is a standard architecture for distributed, muti-tier enterprise applications.

Sun's J2EE architecture emphasizes thin clients with application logic implemented in software components hosted in the middle tier. J2EE defines a suite of standard services that support components so that application logic does not have to be concerned with low-level details such as networking, database access, security, and data-sharing.

J2EE component technologies include servlets and JavaServer Pages (JSP) for server-side presentation logic, and Enterprise JavaBeans (EJB) for implementing business objects and processes.

J2EE services that support components include:

• Java Naming and Directory Interface (JNDI), for accessing components and services
• Java Database Connectivity (JDBC), for moving database data to and from components
• Remote Method Invocation (RMI), for accessing components outside of the middle tier
• Access Control Lists (ACLs), for controlling access to components and applications
• Java Transaction Service (JTS) and Java Transaction API (JTA), for managing transactions
• Java Message Service (JMS), for implementing message-based applications

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