By Ali Akbar
J2EE; brief for Java 2 Platform firm variation. J2EE is a platform-independent, Java-centric atmosphere from solar for constructing, construction and deploying Web-based company purposes on-line. The J2EE platform includes a suite of providers, APIs, and protocols that offer the performance for constructing multitiered, Web-based purposes. many of the key positive factors and prone of J2EE: on the consumer tier, J2EE helps natural HTML, in addition to Java applets or purposes. It is dependent upon Java Server Pages and servlet code to create HTML or different formatted facts for the customer. company JavaBeans (EJBs) offer one other layer the place the platform's good judgment is kept. An EJB server offers features reminiscent of threading, concurrency, defense and reminiscence administration. those providers are obvious to the writer. Java Database Connectivity (JDBC), that is the Java such as ODBC, is the normal interface for Java databases. The Java servlet API complements consistency for builders with no requiring a graphical person interface.
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The applet is an amazing client program, and the servlet is an amazing server program. Chapter 1: Figure 1-6. 3 Specification from Sun Microsystems. HTTP servlets form an integral part of J2EE. JSP JSP is Sun’s specification for embedding Java with HTML to provide on-the-fly content for Web pages. When you create dynamic content, JSPs are more convenient to write than HTTP servlets because they allow you to embed Java code directly into your HTML pages, in contrast with HTTP servlets, in which you embed HTML inside Java code.
In the typical development and production process, some teams design front ends; others build front-end logic; others work at various business layers (middle-tier); some teams are responsible for database administration; and some are responsible for database Chapter 1: WebLogic Server Basics development, business analysis, and so on. Such an environment can prove difficult for keeping teams working in a truly integrated manner. When developing in Java, you should always make sure that you’re working in a controlled development environment.
The application server is the cornerstone of a software architecture designed to tie together different components of a complex application, yet maintain a fundamental modularity in the software. First and foremost, application servers provide the glue that connects information from a database with the end user or client program, which is often running on a Web browser. WebLogic Server provides the means to cache and control data flow for better overall performance and scalability of applications in production.