In Java, J2EE is an aspect of the application in recent years. The talents in society continue to increase. Go to Www.51job.com to search for Java's programmers, they will understand .j2ee is not a thing, but A system, three words are unclear. But learn J2EE, you need to master those knowledge and give a reference. Main API and technology: Java 2 SDK, Standard Edition RMI / IIOP JDBCTM Java Messaging Service (JMS) JNDI Servlet Javaserver PagesTM (JSP) JavaMail JavaBeansTM Activation Framework (JAF) Enterprise JavaBeans (EJB) Java Transaction API (JTA) Web Server (some of which will involve some SOAP, JAXP ..., etc.): JDOM, Log4j, Junit, Struts, Spring, Hibernate .....
Additional: common servers: such as: apache, tomcat, jboss, weblogic, Webspere ...................
Additional: Common Database: Mysql, Sql Server, Oracle, DB2 .........................
J2EE architecture diagram:
J2EE application diagram:
Recently, it seems that EJB is 3.0, although it is a test phase, a formal version takes a year, but his strong and once shocks the world, and introduces the recent period in the "programmer".
