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1、Thetitleofthebook:《JavaServerPagesTM,ThirdEdition》.Author:HansBergsten.Press:O’ReillyMedia，Inc.Source:http://wwww.csdn.com.cn.Chapter18.WebApplicationModelsPartIIofthisbookdescribeshowyoucancreatemanydifferenttypesofapplicationsusingonlyJSPpageswithgenericcom
2、ponents—JSTLactions,customactionsandbeans—toaccessdatabases,presentcontentindifferentlanguages,protectpages,andsoforth—allwithoutknowingmuchaboutJavaprogramming.Thisapproachworksfineformanytypesofwebapplications,suchasemployeeregisters,productcatalogs,andconf
3、erenceroomreservationsystems.Butforapplicationswithcomplicatedschemas,intricatebusinessrules,andtrickycontrolflows,thegenericcomponentsjustdon'tcutit,andyousuddenlyfindthatyouneedamorepowerfulwaytohandletherequestprocessingandthebusinesslogic.AsImentionedinCh
4、apter3,JSPcanbecombinedwithotherJavatechnologiessuchasservletsandEJBinmorecomplexapplications.Inthischapter,welookathowJSPfitsintothislargerpicture.Afterthebriefdescriptionofthemostcommonapplicationmodelsinthischapter,Chapter19describesthecombinationofservlet
5、sandJSPindetail.ThematerialpresentedinthispartofthebookisgearedtowardsJavaprogrammers.Ifyou'renotaprogrammer,youmaystillwanttobrowsethroughthisparttogetafeelforthepossibilities,butdon'texpecttounderstandeverything.Toreallyappreciatethetechniquesdescribedinthi
6、spartofthebook,youshouldhaveexperiencewithJavaprogrammingingeneral.FamiliaritywithJavaservletsalsohelps,andashortintroductionisincludedinChapter19forthosewhoarenewtothistechnology.18.1TheJava2EnterpriseEditionModelAttheJavaOneconferenceinSanFranciscoinJune199
7、9,SunMicrosystemsannouncedanewarchitectureforJava,withseparateeditionsfordifferenttypesofapplications:theJava2StandardEdition(J2SE)fordesktopandworkstationdevices;theJava2MicroEdition(J2ME)forsmalldevicessuchascellphones,pagers,andPDAs;andtheJava2EnterpriseEd
8、ition(J2EE)forserver-basedapplications.J2EEisacompilationofvariousJavaAPIsthathavepreviouslybeenofferedasseparatepackages;anApplicationProgrammingModel(APM)(alsoknownastheJ2EEBlueprints)t
