First Day: Motivation

最新推荐文章于 2024-09-05 14:20:05 发布

原创最新推荐文章于 2024-09-05 14:20:05 发布 · 616 阅读

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文章标签：

#application #descriptor #deployment #components #websphere #exchange

本文介绍了J2EE平台的基本概念及其在Java客户端-服务器应用开发中的作用，并详细解释了EAR和WAR文件的组成及用途。

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Since I have been invoking with J2EE, especially JSF and WebSphere Portlet, for almost two years, I believe it is the time to record what I have learned in between, and share the experience with you. My motivation is very simple: exchange our minds to ease the work.

For the first day, I start with some simple concepts.

What is J2EE?

It is the Platform.

It is the Platform for developing client-server applications in Java.

The platform is highly available, reliable, scalable, and secure platform.

What is EAR, WAR files?

EAR: It is the enterprise archive. It represents a J2EE application that can be deployed into Application Server. An .ear file contains a deployment descriptor (application.xml), which describes the contents of the application and contains instructions for the entire application, such as security settings to be used in the runtime environment.

WAR: It contains all the components of a Web application, like HTML-, CSS-, JSP-files, Complied Java Servelt classes, images, and portlet. The .war file includes a deployment descriptor (web.xml), which describes how to deploy the various components packaged within the Web module.

That's all for today. Resources are from IBM Redbooks.