As an open source EJB container, JBOS is integrated with open source web containers such as Tomcat / Jetty, fully supports J2EE standard specification. In the past, J2EE was only a large system and expensive synonym, because JBoss reduced SMEs to enter J2EE field threshold, for IBM BEA and other business J2EE servers such as WebSphere, WebLogic, etc., JBoss 3. Previous versions have never been obtained. J2EE certification, despite this, JBoss has been widely used in multiple industries and fields over the past few years. From Google's easy searching for JBoss use technology, JBoss use is huge. Today, the JBoss organization will announce the news that their JBoss 4.0 get certified by July 19, 2004. JBoss 4.0 is an EJB container that adopts AOP new design concept. This advanced design concept is undoubtedly in the forefront of IBM BEA and other industrial manufacturers. The advanced AOP design concept will inevitably lead to the birth of easy to use stable EJB server products. JBoss 4 is like this. One area leads the integrated J2EE server such as Tomcat, JBossmq. JBoss 4 is also the first to open source field, through J2EE certified application servers, and some people think that there is no need to pass Sun's J2EE certification, but through certification, people who have dubbed their attitudes or hesitation from open source products: , JBoss 4 and IBM's WebShere and BEA WebLogic are as good, no problem.