J2EE应用中英文对照外文翻译文献.docx

1、J2EE应用中英文对照外文翻译文献J2EE应用中英文对照外文翻译文献(文档含英文原文和中文翻译)SSH based on Web Technology1、IntroductionOne preface along with the Java technique of gradual mature and perfect, Be establishment business enterprise class application of standard terrace, the J2 EE terrace got substantial of development .Several tech

2、nique asked for help from to include in the J2 EE norm : Enterprise JavaBean (EJB), Java Servlets (Servlet), Java Server Pages(JSP), Java Message Service(JMS).etc., development many application system.But, also appeared some problem in the tradition J2 the EE the application of the development the p

3、rocess:1)the antinomy of of data model and logic model. Currently the database of usage basically and all is relation type database, but the Java be essentially a kind of the language which face to object, object at saving with read usage SQL and JDBC carry on a database operation and lowered plait

4、distance of efficiency and system of can maintenance;2)tradition of J2 EE application much the adoption is according to the EJB heavy weight frame, this kind of frame suitable for develop a large business enterprise application, but usage the EJB container carry on development and adjust to try to n

5、eed to be waste a great deal of time.For lowering the Ou of code to match sex, exaltation system of development efficiency, this text put forward 1 kind EE according to the J2 of the Struts frame and Spring frame and the Hibernate frame application development strategy. 2、Use the Struts realization

6、MVC structure use the Struts realization MVC structure MVC(Model-View-Controller) is put forward by the Trygve Reenskaug, first drive application in the environment SmallTalk-80, is many to hand over with each other with interface system of constitute foundation. According to the need of variable of

7、 the interface design, MVC hand over with each other constitute of system to resolve into model and see diagram, controller three part. Model(Model) is software processing problem logic at independence in outside manifestation under contents and form circumstance of inside abstract, packed the core

8、data, logic of problem and function of calculation relation, independence in concrete of interface expression and I/O operation. See diagram(View) mean information and particular form demonstration of model data and logic relation and appearance to the customer. It acquire a manifestation informatio

9、n from the model, there can be many for homology of information dissimilarity of manifestation form or see diagram. The controller(Controller) is a processing the customer hand over with software with each other operation of, its job is control provide model in any variety of dissemination, insure a

10、 customer interface among the model of rightness should contact; It accept a customer of importation, give the importation feedback model, then realization compute model control, is make model and see diagram to moderate work of parts. Usually 1 see a diagram rightness should a controller. Model, se

11、e separate of diagram and controller, make a model be able to have many manifestation to see diagram. If the customer pass a certain see the controller of diagram change the data of model, all other dependence in these see of data diagram all should reflection arrive these variety. When therefore an

12、d regardless occurrence what data variety, controller all would variety notice ally see diagram, cause manifestation of renewal. This is actually a kind of variety of model-dissemination mechanism. The Struts frame is to be the item of Apache Jakarta to constitute part to publish luck to do at the e

13、arliest stage, it inherited MVC of each item characteristic, and did according to the characteristics of J2 EE correspond of variety with expand. The Struts frame was good to combine Jsp , Java Servlet , Java Bean, Talia etc. technique. In the Struts, what to undertake the controller role in the MVC

14、 be an ActionServlet. The ActionServlet is an in general use control module. This control module provided a processing all HTTP claim which send out Struts of entrance point. Its interception with distribute these claim to arrive correspond of action type.(these action all of type is Action son type

15、)Moreover the control module is also responsible for using to correspond of claim the parameter fill Action Form(FromBean), and pass action type(ActionBean).Action type the business logic of the interview core, then interview Java Bean or adjust to use EJB. End action type control the power pass fol

16、low-up of JSP document, from JSP document born see diagram. All these control logic make use of Struts-config.xml the document come to allocation. See diagram in the Struts frame main from JSP born page completion, the Struts provide abundant of JSP label database, this is advantageous to separating

17、 performance logic and procedure logic.The model is with 1 or the form existence of several Java Bean. In the Struts, main existence three kinds of Bean, respectively BE: Action, ActionForm, EJB perhaps Java Bean. The Struts frame have no concrete definition model layer of realization, in actually t

18、he development, model layer usually is close with business logic connect with each other, and want to carry on operation to the first floor data. The underneaths introduction is a kind of development strategy, lead the Hibernate into the model layer of Struts frame, usage it to carry on a data to pa

19、ck with reflect to shoot, provide hold out for long time turn of support. 4 usage Hibernate and the Struts development J2 EE application 4.1 system structure diagram 3 manifestation according to Hibernate and Struts development strategy of system structure diagram. 3、Spring the Application Framework

20、 Spring isnt particularly a web framework but a generic lightweight application framework with dedicated web support, and show the architectural differences to Struts and WebWork .In contrast to Struts or WebWork, Spring is an application framework for all layers: It offers a bean configuration foun

21、dation, AOP support, a JDBC abstraction framework, abstract transaction support, etc. It is a very non-intrusive effort: Your application classes do not need to depend on any Spring classes if not necessary, and you can reuse every part on its own if you like to. From its very design, the framework

22、encourages clean separation of tiers, most importantly web tier and business logic: e.g. the validation framework does not depend on web controllers. Major goals are reusability and testability: Unnecessary container or framework dependencies can be considered avoidable evils.Of course, Springs own

23、web support is nicely integrated with the frameworks general patterns. Nevertheless, replacing the web solution with Struts, WebWork, or the like is easy. Both with Springs web support or a different one, Spring allows for building a true dedicated middle tier in the web container, with the option t

24、o reuse exactly the same business logic in test environments or standalone applications. And within J2EE, your business logic will not unnecessarily depend on container services like JTA or EJB - allowing complex, well-architected web applications to run in a simple container like Tomcat or Resin.No

25、te that Spring doesnt generally aim to compete with existing solutions. It rather fosters seamless integration with standards like Servlet, JSP, JTA, JNDI, JDBC, and JDO, and well-suited tools like Hibernate, Velocity, Log4J, and Cauchos Hessian/Burlap. The framework is designed to grow with the nee

26、ds of your applications, in terms of technology choice: For example, you will probably use JTA via Springs JtaTransactionManager if you need distributed transactions - but only then, as there are perfect replacements for single databases, like DataSourceTransactionManager or HibernateTransactionMana

27、ger.4、The Design of Springs Web Framework Springs web framework is designed around a DispatcherServlet that dispatches requests to handlers, with configurable handler mappings, view resolution, and locale and theme resolution. The default handler is a very simple Controller interface, just offering

28、a ModelAndView handleRequest(request,response) method. This can already be used for application controllers, but you will prefer the included implementation hierarchy, consisting of AbstractController, AbstractCommandController, MultiActionController, SimpleFormController, AbstractWizardFormControll

29、er. Application controllers will typically be subclasses of those. Note that you can choose an appropriate base class: If you dont have a form, you dont need a FormController. This is a major difference to Struts.You can take any object as command or form object: Theres no need to implement an inter

30、face or derive from a base class. Springs data binding is highly flexible, e.g. it treats type mismatches as validation errors that can be evaluated by the application, not as system errors. So you dont need to duplicate your business objects properties as Strings in your form objects, just to be ab

31、le to handle invalid submissions, or to convert the Strings properly. Instead, its often preferable to bind directly to your business objects. This is another major difference to Struts which is built around required base classes like Action and ActionForm - for every type of action. Compared to Web

32、Work, Spring has more differentiated object roles: It supports the notion of a Controller, an optional command or form object, and a model that gets passed to the view. The model will normally include the command or form object but also arbitrary reference data. Instead, a WebWork Action combines al

33、l those roles into one single object. WebWork does allow you to use existing business objects as part of your form, but just by making them bean properties of the respective Action class. Finally, the same Action instance that handles the request gets used for evaluation and form population in the view. Thus, reference data needs t