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1、外文资料原文外文资料原文Struts——anopen-sourceMVCimplementationAuthor:MalcolmDavis.ThisarticleintroducesStruts,aModel-View-ControllerimplementationthatusesservletsandJavaServerPages(JSP)technology.StrutscanhelpyoucontrolchangeinyourWebprojectandpromotespecialization.Evenifyouneverimplement
2、asystemwithStruts,youmaygetsomeideasforyourfutureservletsandJSPpageimplementation.IntroductionKidsingradeschoolputHTMLpagesontheInternet.However,thereisamonumentaldifferencebetweenagradeschoolpageandaprofessionallydevelopedWebsite.Thepagedesigner(orHTMLdeveloper)mustunderstand
3、colors,thecustomer,productflow,pagelayout,browsercompatibility,imagecreation,JavaScript,andmore.Puttingagreatlookingsitetogethertakesalotofwork,andmostJavadevelopersaremoreinterestedincreatingagreatlookingobjectinterfacethanauserinterface.JavaServerPages(JSP)technologyprovides
4、thegluebetweenthepagedesignerandtheJavadeveloper.Ifyouhaveworkedonalarge-scaleWebapplication,youunderstandthetermchange.Model-View-Controller(MVC)isadesignpatternputtogethertohelpcontrolchange.MVCdecouplesinterfacefrombusinesslogicanddata.StrutsisanMVCimplementationthatusesSer
5、vlets2.2andJSP1.1tags,fromtheJ2EEspecifications,aspartoftheimplementation.YoumayneverimplementasystemwithStruts,butlookingatStrutsmaygiveyousomeideasonyourfutureServletsandJSPimplementations.Model-View-Controller(MVC)JSPtagssolvedonlypartofourproblem.Westillhaveissueswithvalid
6、ation,flowcontrol,andupdatingthestateoftheapplication.Thisiswhere外文资料原文MVCcomestotherescue.MVChelpsresolvesomeoftheissueswiththesinglemoduleapproachbydividingtheproblemintothreecategories:ModelThemodelcontainsthecoreoftheapplication'sfunctionality.Themodelencapsulatesthestateo
7、ftheapplication.Sometimestheonlyfunctionalityitcontainsisstate.Itknowsnothingaboutthevieworcontroller.ViewTheviewprovidesthepresentationofthemodel.Itisthelookoftheapplication.Theviewcanaccessthemodelgetters,butithasnoknowledgeofthesetters.Inaddition,itknowsnothingaboutthecontr
8、oller.Theviewshouldbenotifiedwhenchangestothemodeloccur.Contr
