JSP技术简介及特点——外文翻译

1、JSPTechnologyConspectusAndSpecialtiesBy:KathySierraandBertBatesSource:Servlet&JSPTheJSP(JavaServermix)technologyisusedbytheSunmicrosystemissuedbythecompanytodevelopdynamicWebapplicationtechnology.Withitseasy,cross-platform,inmanydynamicWebapplicationprogramminglanguages,inashortspanofafewyears,hasformedacompletesetofstandards,andwidelyusedinelectroniccommerce,etc.InChina,theJSPnowalsogotmoreextensiveattention,getagooddevelopment,moreandmoredynamicwebsitetoJSPtechnology.TherelatedtechnologiesofJ。

2、SParebrieflyintroduced.TheJSPasimpletechnologycanquicklyandwiththemethodofgeneratingWebpages.UsetheJSPtechnologyWebpagecanbeeasilydisplaydynamiccontent.TheJSPtechnologyaredesignedtomaketheconstructionbasedonWebapplicationseasierandefficient,andtheseapplicationsandvariousWebserver,applicationserver,thebrowseranddevelopmenttoolsworktogether.TheJSPtechnologyisn'ttheonlydynamicwebtechnology,alsonotthefirstone,intheJSPtechnologyexistedbeforetheemergenceofseveralexcellentdynamicwebtechnology,suchasCGI。

3、,ASP,etc.Withtheintroductionofthesetechnologiesunderdynamicwebtechnology,thedevelopmentandtheJSP.TechnicalJSPthedevelopmentbackgroundanddevelopmenthistoryInwebbriefhistory,fromaworldwidewebthatmostofthenetworkinformationstaticonstocktransactionsevolutiontoacquisitionofanoperationandinfrastructure.Inavarietyofapplications,maybeusedforbasedonWebclient,looknorestrictions.Basedonthebrowserclientapplicationsthantraditionalbasedonclient/serverapplicationshasseveraladvantages.Thesebenefitsincludealmost。

4、nolimitclientaccessandextremelysimplifiedapplicationdeploymentandmanagement(toupdateanapplication,managementpersonnelonlyneedtochangetheprogramonaserver,notthousandsofinstallationinclientapplications).So,thesoftwareindustryisrapidlytobuildontheclientbrowsermulti-layerapplication.TherapidgrowthofexquisitebasedWebapplicationrequirementsdevelopmentoftechnicalimprovements.StaticHTMLtoshowrelativelystaticcontentisrightchoice,ThenewchallengeistocreatetheinteractionbasedonWebapplications,intheseprocedu。

5、res,thecontentofaWebpageisbasedontheuser'srequestorthestateofthesystem,andarenotpredefinedcharacters.FortheproblemofanearlysolutionistouseaCGI-BINinterface.DeveloperswritetointerfacewiththerelevantproceduresandseparatebasedonWebapplications,thelatterthroughtheWebservertoinvoketheformer.Thisplanhasseriousproblem--eachnewextensibleCGIrequirementsinanewprocessontheserver.Ifmultipleconcurrentusersaccesstothisprocedure,theseprocesseswillusetheWebserverofallavailableresources,andtheperformanceofthesys。

6、temwillbereducedtoextremelylow.SomeWebserverprovidershavetoprovidefortheirserverbypluginsandtheAPItosimplifytheWebapplicationdevelopment.ThesesolutionsareassociatedwithcertainWebserver,cannotsolvethespanmultiplesupplierssolutions.Forexample,Microsoft'sActiveServermix(ASP)technologyintheWebpagetocreatedynamiccontentmoreeasily,butalsocanworkinMicrosoftonPersonalWebServerandIIS.Thereareothersolutions,butcannotmakeanordinarypagedesignerscaneasilymaster.Forexample,suchastheServletJavatechnologiescanu。

7、seJavalanguageinteractionapplicationservercodeeasier.DeveloperstowritesuchServlettoreceivesignalsfromtheWebbrowsertogenerateanHTTPrequest,adynamicresponse(maybeinquiresthedatabasetofinishtherequest),thensendcontainHTMLorXMLdocumentstotheresponseofthebrowser.note:oneisbasedonaJavaServletJavatechnicaloperationintheserverprogram(withdifferent,thelatteroperatingintheAppletbrowserend).InthisbooktheServletchapter4.Usingthismethod,theentirepagemusthavemadeinJavaServlet.IfdevelopersorWebmanagerswanttoad。

8、justpage,you'llhavetoeditandrecompiletheServletJava,eveninlogichasbeenabletorun.Usingthismethod,thedynamiccontentwiththeapplicationofthepagestillneedtodevelopskills.Obviously,whatisneededisaindustrytocreatedynamiccontentwithinthescopeofthepagesofthesolution.Thisprogramwillsolvethecurrentschemearelimited.Asfollows:canonanyWebserverorapplications.willapplicationpagedisplaysandseparation.canrapidlydevelopingandtesting.simplifytheinteractivedevelopmentbasedonWebapplicationprocess.TheJSPtechnologyisd。

9、esignedtomeetsuchrequirements.TheJSPspecificationisaWebserver,applicationserver,tradingsystemanddevelopextensivecooperationbetweenthetoolsuppliers.FromthisstandardtodeveloptheexistingintegrationandbalanceofJavaprogrammingenvironment(forexample,JavaServletandJavaBeans)supporttechniquesandtools.TheresultisakindofnewanddevelopingmethodbasedonWebapplications,usingcomponent-basedapplicationlogicpagedesignerswithpowerfulfunctions.OverallSemanticsofaJSPPageAJSPpageimplementationclassdefinesa_jspService。

10、()methodmappingfromtherequesttotheresponseobject.Somedetailsofthistransformationarespecifictothescriptinglanguageused(seeChapterJSP.9,“Scripting”).Mostdetailsarenotlanguagespecificandaredescribedinthischapter.ThecontentofaJSPpageisdevotedlargelytodescribingthedatathatiswrittenintotheoutputstreamoftheresponse.(TheJSPcontainerusuallysendsthisdatabacktotheclient.)ThedescriptionisbasedonaJspWriterobjectthatisexposedthroughtheimplicitobjectout(seeSectionJSP.1.8.3,“ImplicitObjects”).Itsvaluevaries:Init。