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1、Struts——anopen-sourceMVCimplementationThisarticleintroducesStruts,aModel-View-ControllerimplementationthatusesservletsandJavaServerPages(JSP)technology.StrutscanhelpyoucontrolchangeinyourWebprojectandpromotespecialization.EvenifyouneverimplementasystemwithStruts,youmaygetsomeideasforyo
2、urfutureservletsandJSPpageimplementation.IntroductionKidsingradeschoolputHTMLpagesontheInternet.However,thereisamonumentaldifferencebetweenagradeschoolpageandaprofessionallydevelopedWebsite.Thepagedesigner(orHTMLdeveloper)mustunderstandcolors,thecustomer,productflow,pagelayout,browserc
3、ompatibility,imagecreation,JavaScript,andmore.Puttingagreatlookingsitetogethertakesalotofwork,andmostJavadevelopersaremoreinterestedincreatingagreatlookingobjectinterfacethanauserinterface.JavaServerPages(JSP)technologyprovidesthegluebetweenthepagedesignerandtheJavadeveloper.Ifyouhavew
4、orkedonalarge-scaleWebapplication,youunderstandthetermchange.Model-View-Controller(MVC)isadesignpatternputtogethertohelpcontrolchange.MVCdecouplesinterfacefrombusinesslogicanddata.StrutsisanMVCimplementationthatusesServlets2.2andJSP1.1tags,fromtheJ2EEspecifications,aspartoftheimplement
5、ation.YoumayneverimplementasystemwithStruts,butlookingatStrutsmaygiveyousomeideasonyourfutureServletsandJSPimplementations.Strutspros·UseofJSPtagmechanismThetagfeaturepromotesreusablecodeandabstractsJavacodefromtheJSPfile.ThisfeatureallowsniceintegrationintoJSP-baseddevelopmenttoolstha
6、tallowauthoringwithtags.·TaglibraryWhyre-inventthewheel,orataglibrary?Ifyoucannotfindsomethingyouneedinthelibrary,contribute.Inaddition,StrutsprovidesastartingpointifyouarelearningJSPtagtechnology.·OpensourceYouhavealltheadvantagesofopensource,suchasbeingabletoseethecodeandhavingeveryo
7、neelseusingthelibraryreviewingthecode.Manyeyesmakeforgreatcodereview.·SampleMVCimplementationStrutsofferssomeinsightifyouwanttocreateyourownMVCimplementation.·ManagetheproblemspaceDivideandconquerisanicewayofsolvingtheproblemandmakingtheproblemmanageable.Ofcourse,theswordcutsbothways
