计算机科学与技术设计论文外文翻译

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1、本科毕业设计(论文)外文翻译（附外文原文）系(院)：信息科学与工程学院课题名称：学生信息管理系统专业(方向)：计算机科学与技术（应用）7.1EnterActionMappingsTheModel2architecture(seechapter1)encouragesustouseservletsandJava-ServerPagesinthesameapplication.UnderModel2,westartbycallingaservlet.Theservlethandlesthebusinesslogicanddirectscontroltotheappropriatepagetocom

2、pletetheresponse.Thewebapplicationdeploymentdescriptor(web.xml)letsusmapaURLpatterntoaservlet.Thiscanbeageneralpattern,like*.do,oraspecificpath,likesaveRecord.do.SomeapplicationsimplementModel2bymappingaservlettoeachbusinessoperation.Thisapproachworks,butmanyapplicationsinvolvedozensorhundredsofbusi

3、nessoperations.Sinceservletsaremultithreaded,instantiatingsomanyservletsisnotthebestuseofserverresources.Servletsaredesignedtohandleanynumberofparallelrequests.Thereisnoperformancebenefitinsimplycreatingmoreandmoreservlets.Theservlet’sprimaryjobistointeractwiththecontainerandHTTP.Handlingabusinessop

4、erationissomethingthataservletcoulddelegatetoanothercomponent.StrutsdoesthisbyhavingtheActionServletdelegatethebusinessoperationtoanobject.UsingaservlettoreceivearequestandrouteittoahandlerisknownastheFrontControllerpattern[Go3].Ofcourse,simplydelegatingthebusinessoperationtoanothercomponentdoesnots

5、olvetheproblemofmappingURIs[W3C,URI]tobusinessoperations.OuronlywayofcommunicatingwithawebbrowseristhroughHTTPrequestsandURIs.ArrangingforaURItotriggerabusinessoperationisanessentialpartofdevelopingawebapplication.Meanwhile,inpracticemanybusinessoperationsarehandledinsimilarways.SinceJavaismultithre

6、aded,wecouldgetbetteruseofourserverresourcesifwecouldusethesameActionobjecttohandlesimilaroperations.Butforthistowork,wemightneedtopasstheobjectasetofconfigurationparameterstousewitheachoperation.Sowhat’sthebottomline?ToimplementModel2inanefficientandflexibleway,weneedto:EnterActionMappings195_Route

7、requestsforourbusinessoperationstoasingleservlet_Determinewhichbusinessoperationisrelatedtotherequest_Loadamultithreadedhelperobjecttohandlethebusinessoperation_Passthehelperobjectthespecificsofeachre