Dependency injection allows the Java EE container to automatically insert references to other required components or resources, using annotations. This tutorial uses examples to describe the features available in the Java EE platform for developing enterprise applications. Whether you are a new or experienced enterprise developer, you should find the examples and accompanying text a valuable and accessible knowledge base for creating your own solutions.
A set of contextual services that make it easy for developers to use enterprise beans along with JavaServer Faces technology in web applications.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. What is Java EE? Asked 13 years, 1 month ago. Active 4 years, 3 months ago. Viewed k times. Improve this question. Sun changed the term. Most people still use J2EE. SO is google but better. Most google queries end up here. I see no problem with asking seemingly simple questions. The last "2" was J2EE 1.
Show 6 more comments. Active Oldest Votes. Java EE is a collection of specifications for developing and deploying enterprise applications. Improve this answer. BalusC 1. Its primary tasks are the following:. Collect input from users of the client interface and return appropriate results from the components in the business tier. Java programming language classes that dynamically process requests and construct responses, usually for HTML pages.
A user-interface component framework for web applications that allows you to include UI components such as fields and buttons on a page, convert and validate UI component data, save UI component data to server-side data stores, and maintain component state. Text-based documents that are compiled into servlets and define how dynamic content can be added to static pages, such as HTML pages.
The business tier consists of components that provide the business logic for an application. Business logic is code that provides functionality to a particular business domain, like the financial industry, or an e-commerce site. In a properly designed enterprise application, the core functionality exists in the business tier components. Enterprise beans are managed components that encapsulate the core functionality of an application. An API for accessing data in underlying data stores and mapping that data to Java programming language objects.
Managed components that may provide the business logic of an application, but do not require the transactional or security features of enterprise beans. The enterprise information systems EIS tier consists of database servers, enterprise resource planning systems, and other legacy data sources, like mainframes. These resources typically are located on a separate machine than the Java EE server, and are accessed by components on the business tier. The client tier consists of a client program that makes requests to the middle tier.
The middle tier is divided into a web tier and a business tier, which handle client requests and process application data, storing it in a permanent datastore in the data tier. Java EE application development concentrates on the middle tier to make enterprise application management easier, more robust, and more secure.
The client tier consists of application clients that access a Java EE server and that are usually located on a different machine from the server. The clients make requests to the server. The server processes the requests and returns a response back to the client. Many different types of applications can be Java EE clients, and they are not always, or even often Java applications.
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