SSh架构详解英文版Word下载.doc

SSh架构详解英文版Word下载.doc

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2HierarchicalWebMechanism 4

3LightweightWebApplicationFramework 4

4StrutsMVCFramework 6

4.1Strutsworkmechanism 6

4.2Views 7

4.3Controller 7

4.4Model 7

5SpringFrameworktechnology 8

5.1SpringFramework 9

5.2mechanism 10

6HibernatePersistentFramework 10

7FrameworkApplicationAnalysis 12

8Conclusion 13

Acknowledgments 14

ApplicationoftheLightweightJ2EEFramework

BasedonSSH

Abstract

Theapplicationsystemfeaturesinsmallormedium-sizedenterpriselieinthegreaterflexibilityandsafetyhighperformance-priceratio.TraditionalJ2EEframeworkcannotadapttotheseneeds,butthesystemapplicationbasedonSSH（Struts+Spring+Hibernate）technologycanbettersatisfysuchneeds.ThispaperanalysessomeintegrationtheoryandkeytechnologiesaboutSSH,andaccordingtotheintegrationconstructsalightweightWEBframework,whichhasintegratedthethreekindsoftechnology,formingthelightweightWEBframeworkbasedonSSHandgaininggoodeffectsinpracticalapplications.

Keywords：

lightweight,webframework,J2EE,Struts,Spring,Hibernate

1Introduction

GenerallytheJ2EEplatform[27]usedinlargeenterpriseapplications,canwellsolvetheapplicationofreliability,safetyandstability,butitsweaknessisthepricehighandtheconstructingcycleislong.Correspondingtothesmallormediumenterpriseapplications,thereplaceapproachisthesystemframeworkoflightweightWEB,includingthemorecommonlyusedmethodswhicharebasedontheStrutsandHibernate.WiththewideapplicationofSpring,thethreetechnologycombinationmaybeabetterchoiceasalightweightWEBframework.ItuseslayeredstructureandprovidesagoodintegratedframeworkforWebapplicationsatalllevelsinminimizingtheInterlayercouplingandincreasingtheefficiencyofdevelopment.Thisframeworkcansolvealotofproblems,withgoodmaintainabilityandscalability.Itcansolvetheseparationofuserinterfaceandbusinesslogicseparation,theseparationofbusinesslogicanddatabaseoperationandthecorrectprocedurecontrollogic,etc.ThispaperstudiesthetechnologyandprincipleofStrutsandSpringandHibernate,presentingaprovedlightweightWEBapplicationframeworkforenterprise.

2HierarchicalWebMechanism

HierarchicalWebframeworkincludingtheuserpresentationlayer,businesslogiclayer,datapersistencelayer,expansionlayeretc,eachlayerfordifferentfunction,respectivelytofinishthewholeapplication.Thewholesystemaredividedintodifferentlogicmodulewithrelativelyindependentandmutual,andeachmodulecanbeimplementedaccordingtodifferentdesign.Itcanrealizethesystemparalleldevelopment,rapidintegration,goodmaintainability,scalability.Figure2.1isatypicallightweightJ2EEapplicationarchitecture.TheWebapplicationlayeredstructurebasicallyisdividedintothreelayers:

thepresentationlayer,businesslogiclayer,datapersistencelayer[28].

Figure2.1typicallightweightJ2EEframework

3LightweightWebApplicationFramework

IntheapplicationbasedonB/Sstructure,Strutsframeworkisusedtoimplementthepresentationlayer,andHibernateisusedtolastinglayer,andSpringisthecoreofthesystem.SpringintegratestheMVCframeworkofStrutsupwardandintegratestheORMframeworkdownward.TheIOCcontainermanagesthedependenciesbetweenthevariouscomponents.

Thedevelopmentpatterncombinedofthosethreekindstechnologyrealizesthefivelayersstructureofapplicationsystem,andconstructsaWebapplicationdevelopmentframework[29].Thisframeprocessingshowsasthefigure3.1.

Figure3.1SystemApplicationFramework

StrutsframeworkrealizedMVCdesignpatternsinthepresentationlayer[30].Inthepresentationlayer,thefunctionsofcontrollerachievedbyActionServletandActionMapping.ActionServletacceptsrequestsfromtheclient,andeachActionMappingrealizesmappingbetweenarequestandaspecificAction.

ViewrealizesbytheTagliboftheJSPpage.ModelrealizesbyActionandActionForm.ActionobjectcallsbusinesslogicmoduleinterfaceandsubmittheresponsetotherightViewcomponents.ActionFormcomponentobjectrealizesgooddataencapsulationforclientform,andrealizesmutualsupportbetweenViewandModel.BusinesslayerachievebyJavaBeanclass,includinginterfacesforActioncalling.TheseJavaBeanalsoencapsulatesHibernaterelationships.Businesslayerthroughdataconversionandpersistencelayertorealizeinteractionwithdatabaseresources.PersistencelayerrealizesbyHibernate.HibernateconvertHQLstatementsinJavaclasstoSQLstatements,andoperatedatasourceswithJDBCdriver,finishingdataoperationsuchasadd,delete,modify.Bottomisarelationaldatabase.

4StrutsMVCFramework

4.1Strutsw