J2EE层次架构

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,School of Software, Sichuan University,*,J2EE层次设计架构,典型的三层结构,表示层 （presentation）,主要处理用户和软件的交互,* 视窗图形界面（VB,PB）,（,Client,）,* 基于html的界面,（,Server,）,领域层 （domain）,（业务逻辑层）（,Server or Client,）,对输入和存储数据的计算,* Transation Script,（,属于结构性思维,）,* Domain Model,（属于,OO,思维）,基础架构层 （infrastructure）,存储持久数据,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,1,School of Software, Sichuan University,目前常见,J2EE,的,API,*,JavaServer Pages(JSP)技术1.2,*,Java Servlet技术2.3,*,JDBC API 2.0,*,Java XML处理API(JAXP)1.1,*,Enterprise JavaBeans技术2.0,*,Java消息服务(JMS)1.0,*,Java命名目录接口(JNDI)1.2,*,Java事务API(JTA) 1.0,*,JavaMail API 1.2,* J,avaBeans激活架构(JAF)1.0,*,J2EE连接器体系结构(JCA)1.0,*,Java认证和授权服务(JAAS)1.0,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,2,School of Software, Sichuan University,Presentation,Tier,HTML,Client,Java Applet/Java,Applications,Web Server,HTML/XML,Servlets,Java Server Pages (,JSPs,),HTTP,Business,Tier,Data,Tier,Application Server,Existing System,Database,connector,EJB Session Bean,EJB Entity Bean,RMI/IIOP,CORBA/IIOP,RMI/IIOP,Simplified,J2EE,Architecture,JDBC/SQLJ,JDBC/SQLJ,CORBA,Client,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,3,School of Software, Sichuan University,MVC,（,Model-View-Controller,）软件设计模式,1,、模型（,Model,） 模型是应用程序的主体部分。,模型表示业务数据，或者业务逻辑。,2,、视图（,View,） 视图是应用中与用户界面相关的部分。,是用户看到并与之交互的界面。,3,、控制器（,Controller),控制器处理用户的输入。,控制用户界面数据显示和更新,Model,对象状态。,实现了功能模块和显示模块的分离；,提高了应用系统的可维护性、可扩展性、可移植性,和组件的可复用性。,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,4,School of Software, Sichuan University,10/2/2024,5,School of Software, Sichuan University,10/2/2024,6,School of Software, Sichuan University,iCarnegie Library Project,Model View Controller (MVC) architecture,Model,：,JavaBeans _ *.java in library package,to represent the data and logic of the subset of,the external world used in the program,View,：,Java Server Pages _ *.jsp,to manages the output of a user interface,Controller,：,Java Servlets _ *controller.java,to processes the users input,The separation of tasks allows for easily,maintainable systems,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,7,School of Software, Sichuan University,member (,ssn, driverlicstate, driverlicnum, fname,lname, street, city, state, pcode, phone,email, passwd),librarian (,ssn, fname, lname, street, city, state,pcode, phone, email, passwd),booktitle (,callnumber, name, author, edition, isbn,year, publisher),hold (,ssn,callnumber, holddatetime,),book (,bookid,callnumber,borrowerssn, duedate,librarianssn,),we,buser,：,select on all tables/update on book,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,8,School of Software, Sichuan University,Library Objects,JavaBeans,Member, Librarian, Hold, Book and BookTitle,a copy of the information in the database,BookSet, BookTitleSet and HoldSet,a set of Book, BookTitle and Hold objects,LibraryMember, LibraryLibrarian, LibraryBook,and LibraryBookTitle,instantiate the lightweight objects,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,9,School of Software, Sichuan University,Library Objects,JavaBeans,The DBWrapper class,maintains the connectivity to the database,The CommonTags class,a common header and footer for each page,The Library class,log members and librarians in,check books in and out,The LibraryUser class,user interface,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,10,School of Software, Sichuan University,Library Objects,Servlets,Controller.java,SearchController.java,MemberLoginController.java,MemberViewborrowedController.java,MemberViewonholdController.java,LibrarianLoginController.java,LibrarianCheckoutController.java,LibrarianCheckinController.java,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,11,School of Software, Sichuan University,基,于,J2EE,的,开,发,技,术,阮,树,骅,10/2/2024,12,School of Software, Sichuan University,10/2/2024,13,School of Software, Sichuan University,10/2/2024,14,School of Software, Sichuan University,10/2/2024,15,School of Software, Sichuan University,10/2/2024,16,School of Software, Sichuan University,10/2/2024,17,School of Software, Sichuan University,10/2/2024,18,School of Software, Sichuan University,