The underlying transport layer

3.5 J2EE andNet platform requires mastering J2EE (Java 2 platform, enterprise edition, Java 2 Platform Enterprise Edition) andNet platform, and their respective applications. 1) EJB is the core technology of J2EE. EJB is the component model of java server. JDBC。JDBC is the standard for connecting databases with Java language. Java servlet (Java server-side applet).