网页设计外文翻译Word格式.docx
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网页设计外文翻译Word格式.docx
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BenefitsforDevelopers
IfyouareaWebpagedeveloperordesignerwhoisfamiliarwithHTML,youcan:
UseJSPtechnologywithouthavingtolearntheJavalanguage:
YoucanuseJSPtechnologywithoutlearninghowtowriteJavascriplets.Althoughscriptletsarenolongerrequiredtogeneratedynamiccontent,theyarestillsupportedtoprovidebackwardcompatibility.
ExtendtheJSPlanguage:
JavataglibrarydevelopersanddesignerscanextendtheJSPlanguagewith"
simpletaghandlers,"
whichutilizeanew,muchsimplerandcleaner,tagextensionAPI.Thisspursthegrowingnumberofpluggable,reusabletaglibrariesavailable,whichinturnreducestheamountofcodeneededtowritepowerfulWebapplications.
Easilywriteandmaintainpages:
TheJavaServerPagesStandardTagLibrary(JSTL)expressionlanguageisnowintegratedintoJSPtechnologyandhasbeenupgradedtosupportfunctions.Theexpressionlanguagecannowbeusedinsteadofscriptletexpressions.
JSPTechnologyandJavaServlets
JSPtechnologyusesXML-liketagsthatencapsulatethelogicthatgeneratesthecontentforthepage.Theapplicationlogiccanresideinserver-basedresources(suchasJavaBeanscomponentarchitecture)thatthepageaccesseswiththesetags.Anyandallformatting(HTMLorXML)tagsarepasseddirectlybacktotheresponsepage.Byseparatingthepagelogicfromitsdesignanddisplayandsupportingareusablecomponent-baseddesign,JSPtechnologymakesitfasterandeasierthanevertobuildWeb-basedapplications.
JavaServerPagestechnologyisanextensionoftheJavaServlettechnology.Servletsareplatform-independent,server-sidemodulesthatfitseamlesslyintoaWebserverframeworkandcanbeusedtoextendthecapabilitiesofaWebserverwithminimaloverhead,maintenance,andsupport.Unlikeotherscriptinglanguages,servletsinvolvenoplatform-specificconsiderationormodifications;
theyareapplicationcomponentsthataredownloaded,ondemand,tothepartofthesystemthatneedsthem.Together,JSPtechnologyandservletsprovideanattractivealternativetoothertypesofdynamicWebscripting/programmingbyoffering:
platformindependence;
enhancedperformance;
separationoflogicfromdisplay;
easeofadministration;
extensibilityintotheenterprise;
and,mostimportantly,easeofuse.
TodayservletsareapopularchoiceforbuildinginteractiveWebapplications.Third-partyservletcontainersareavailableforApacheWebServer,MicrosoftIIS,andothers.ServletcontainersareusuallyacomponentofWebandapplicationservers,suchasBEAWebLogicApplicationServer,IBMWebSphere,SunJavaSystemWebServer,SunJavaSystemApplicationServer,andothers.
CommunityBackground
TheJSPspecificationistheproductofindustry-widecollaborationwithindustryleadersintheenterprisesoftwareandtoolsmarkets,ledbySunMicrosystems.SunhasmadetheJSPspecificationfreelyavailabletothedevelopercommunity,withthegoalthateveryWebserverandapplicationserverwillsupporttheJSPinterface.JSPpagessharethe"
WriteOnce,RunAnywhere"
advantagesofJavatechnology.JSPtechnologyisakeycomponentintheJava2Platform,EnterpriseEdition,Sun'
shighlyscalablearchitectureforenterpriseapplications.
JSPTechnologyintheJavaEE5Platform
ThefocusofJavaEE5hasbeeneaseofdevelopmentbymakinguseofJavalanguageannotationsthatwereintroducedbyJ2SE5.0.JSP2.1supportsthisgoalbydefiningannotationsfordependencyinjectiononJSPtaghandlersandcontextlisteners.
AnotherkeyconcernoftheJavaEE5specificationhasbeenthealignmentofitswebtiertechnologies,namelyJavaServerPages(JSP),JavaServerFaces(JSF),andJavaServerPagesStandardTagLibrary(JSTL).
TheoutcomeofthisalignmentefforthasbeentheUnifiedExpressionLanguage(EL),whichintegratestheexpressionlanguagesdefinedbyJSP2.0andJSF1.1.
ThemainkeyadditionstotheUnifiedELthatcameoutoftbealignmentworkhavebeen:
·
ApluggableAPIforresolvingvariablereferencesintoJavaobjectsandforresolvingthepropertiesappliedtotheseJavaobjects,
Supportfordeferredexpressions,whichmaybeevaluatedbyataghandlerwhenneeded,unliketheirregularexpressioncounterparts,whichgetevaluatedimmediatelywhenapageisexecutedandrendered,and
Supportforlvalueexpression,whichappearonthe
- 配套讲稿:
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- 特殊限制:
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- 网页 设计 外文 翻译