信息科学与工程学院毕业设计科技文献翻译

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1、信息科学与工程学院毕业设计科技文献翻译《Struts——AnOpen-sourceMVCImplementation》《Struts——一种开源MVC的实现》姓名张三丰学号20140000年级2014级专业计算机科学与技术　指导教师李双双　　　2018年3月Struts——AnOpen-sourceMVCImplementationThisarticleintroducesStruts,aModel-View-ControllerimplementationthatusesservletsandJavaServerPages(JSP)technology.Strutscanhelpyoucon

2、trolchangeinyourWebprojectandpromotespecialization.EvenifyouneverimplementasystemwithStruts,youmaygetsomeideasforyourfutureservletsandJSPpageimplementation1.IntroductionIfyouhaveworkedonalarge-scaleWebapplication,youunderstandthetermchange.Model-View-Controller(MVC)isadesignpatternputtogethertohelpc

3、ontrolchange.MVCdecouplesinterfacefrombusinesslogicanddata.StrutsisanMVCimplementationthatusesServlets2.2andJSP1.1tags,fromtheJ2EEspecifications,aspartoftheimplementation.YoumayneverimplementasystemwithStruts,butlookingatStrutsmaygiveyousomeideasonyourfutureServletsandJSPimplementations.2.Model-View

4、-Controller(MVC)JSPtagssolvedonlypartofourproblem.Westillhaveissueswithvalidation,flowcontrol,andupdatingthestateoftheapplication.ThisiswhereMVCcomestotherescue.MVChelpsresolvesomeoftheissueswiththesinglemoduleapproachbydividingtheproblemintothreecategories:ModelThemodelcontainsthecoreoftheapplicati

5、on'sfunctionality.Themodelencapsulatesthestateoftheapplication.Sometimestheonlyfunctionalityitcontainsisstate.Itknowsnothingaboutthevieworcontroller.ViewTheviewprovidesthepresentationofthemodel.Itisthelookoftheapplication.Theviewcanaccessthemodelgetters,butithasnoknowledgeofthesetters.Inaddition,itk

6、nowsnothingaboutthecontroller.Theviewshouldbenotifiedwhenchangestothemodeloccur.ControllerThecontrollerreactstotheuserinput.Itcreatesandsetsthemodel.3.StrutsSummary3.1StrutsdetailsDisplayedinFigure1isastripped-downUMLdiagramoftheorg.apache.Struts.actionpackage.Figure6showstheminimalrelationshipsamon

7、gActionServlet(Controller),ActionForm(FormState),andAction(ModelWrapper).Figure1UMLdiagramoftherelationshipoftheCommand(ActionServlet)totheModel(Action&ActionForm)3.1.1TheActionServletclassLifeisbette