Flexible use of EJB local and remote interface series: This article shows the design method, implementation, and test results of the sample J2EE application, providing basic comparisons for the local and remote interfaces of Enterprise Java Beans. -> Flexible use of EJB local and remote interfaces (1) -> Flexible use EJB local and remote interface (2) -> Flexible use EJB local and remote interface (3) -> Flexible use EJB local And Remote Interface (4) Rapid Development Series: In this series of articles, it mainly introduces technology developed with the current mainstream software. -> Developing EJBs with JBuilder7 JBoss3 VSS -> Using IBM WSAD 5 Rapid Development EJB2.0 EJB Best Practice Series: -> EJB Best Practices: Building a better exception handling frame -> EJB most Practice: Verification Assistant -> EJB Best Practices: Where is the most suitable practical EJB Development Skills from transaction skills, EJB security and beans, introduced the development skills of EJB foundation. Implementing the Observer mode OBServer mode in the EJB environment ("Observer mode) may be one of the best ways to reduce the degree of object bonding. For example, when writing a typical application, you may decide to provide a factory or manager to trigger an appropriate event, providing separate business logic in the form of a group of listeners of these events; Since then, the system's startup class is in the factory Or After the manager is created, the listener is associated with the factory or manager. Article EJB components This article uses a beginner's vision to introduce some of its subtle differences in the deployment process when deploying the same EJB component on different application servers. These application servers include BEA's WebLogic, IBM WebSphere, and source code open organization's JBoss application server. Enterprise EJB Development Example EJB Structure is a server-side component model on the Java platform. The purpose of designing the EJB structure is to solve the problem raised above by enabling business developers to focus on writing business logic. These enterprise-level beans enable applications programmers to develop unrelated to platforms, transaction-oriented distributed applications, and this application can run on many manufacturers' servers. In this article, the author will introduce the definition of EJB (Enterprise Java Beans), based on the application system structure model of EJB technology and the content and classification of EJB components, and finally combined with EJB-based structural models and EJB components. Developed a business reservation system. Creating a CRM system using EJB This article mainly describes how to develop a CRM system using EJB (Enterprise JavaBean technology, the entire system application J2EE architecture, is developed as the application server as the application server. This article will introduce the architecture of the entire system and the analysis and implementation of EJB in the entire system. EJB component transaction detailed sessions, entities, and message-driven type EJB components, depending on the data resource stored in the database varying degrees or store data information to the database. For enterprise information systems related to EJB components in the J2EE application system, the accuracy, reliability, consistency, and timeliness of the data must be maintained.