《J2EE设计模式》.pdf

J2EE J2EE OOP GoF GoF 23 JavaGoF ClassAClass Class AClassAInterface AClass AInterface a = new AClass(); AInterface a = Afactory.create(); //2 2 Afactorycreate AInterface Afactorycreate Afactorycreate public static AInterface create(){ …… return new AClass(); } EJB EJB EJBHome em = JNDIServer.getRemoteHome(EJB-JNDI-NAME); EJBObject myEJB = em.create(); em.create()Afactory.create() EJBObject Façade BeanBean BeanBean BeanFaçade/Manager Façade Bean 1. Bean 2. DTO DTOVO JavaBeansJ2EE DTOMessage JavaBeansModel Model Domain ObjectDTO 1. Model 2. 3. DTOModel ModelMDA MVC MVCJ2EE Web