[Java Technology] 2.23 EE Development mode description

J2ee

Advantages

1 based on standard architecture and component development

2 adopts a loose design method, which can be invoked either individually or in combination

3 The Java EE component solves all the underlying complex problems

4) component is easy to upgrade

5 component and portal based on the way of XML configuration, convenient and flexible configuration

6 to provide a good external interface for the development system

7) The component is simple to use

• Architecture Level

1 resource layer: Representing Database, LDAP, legacy system,

2 Java PORTAL:J2EE Portal, is a rechargeable Java-EE portal, all the components, examples, sample source code, development design documents are placed in this portal

3) Java Components frame: Java EE platform Framework, all of these components are based on the application server running

4) Application: Representing third party applications and systems

L-Java Components Frame

1) Java Components Frame: is the entire Java EE component running platform, quite a container

2) Java components: consists of a series of independent and unrelated components, including mail components, multilingual components, multiple database components, log components, transaction components and other related components

3) Java tools: To provide Java platform based on the development and Configuration tool

4 User Manual: Customer guide includes development Guide, sample component usage

L Business Process

1 Rd in Development application first read user Manual, understand the application scope of each interface package, usage and precautions

2 Rd must use Java EE tools to configure and initialize the frame component and the Java EE framework before or during the use of Java EE components

3 must invoke the component to run the platform frame before calling the component.

4 further call the various components under the frame for multiple databases, multiple languages, logs, mail operations