计算机科学与技术毕业设计(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.Theservlethandlesthebusinesslogicanddirectscon

2、troltotheappropriatepagetocompletetheresponse.Thewebapplicationdeploymentdescriptor(web.xml)letsusmapaURLpatterntoaservlet.Thiscanbeageneralpattern,like*.do,oraspecificpath,likesaveRecord.do.SomeapplicationsimplementModel2bymappingaservlettoeachbusinessoperation.Thisappr

3、oachworks,butmanyapplicationsinvolvedozensorhundredsofbusinessoperations.Sinceservletsaremultithreaded,instantiatingsomanyservletsisnotthebestuseofserverresources.Servletsaredesignedtohandleanynumberofparallelrequests.Thereisnoperformancebenefitinsimplycreatingmoreandmor

4、eservlets.Theservlet’sprimaryjobistointeractwiththecontainerandHTTP.Handlingabusinessoperationissomethingthataservletcoulddelegatetoanothercomponent.StrutsdoesthisbyhavingtheActionServletdelegatethebusinessoperationtoanobject.Usingaservlettoreceivearequestandrouteittoaha

5、ndlerisknownastheFrontControllerpattern[Go3].Ofcourse,simplydelegatingthebusinessoperationtoanothercomponentdoesnotsolvetheproblemofmappingURIs[W3C,URI]tobusinessoperations.OuronlywayofcommunicatingwithawebbrowseristhroughHTTPrequestsandURIs.ArrangingforaURItotriggerabus

6、inessoperationisanessentialpartofdevelopingawebapplication.Meanwhile,inpracticemanybusinessoperationsarehandledinsimilarways.SinceJavaismultithreaded,wecouldgetbetteruseofourserverresourcesifwecouldusethesameActionobjecttohandlesimilaroperations.Butforthistowork,wemightn

7、eedtopasstheobjectasetofconfigurationparameterstousewitheachoperation.Sowhat’sthebottomline?ToimplementModel2inanefficientandflexibleway,weneedto:EnterActionMappings19529_Routerequestsforourbusinessoperationstoasingleservlet_Determinewhichbusinessoperationisrelatedtother

8、equest_Loadamultithreadedhelperobjecttohandlethebusinessoperation_Passthehelperobjectthespecificsofeach