外文文献JSP发展历史中英文Word格式文档下载.docx

外文文献JSP发展历史中英文Word格式文档下载.docx

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Source:

Servlet&

JSP

TheJavaServerPages（JSP）isakindofaccordingtowebofthescriptplaitdistancetechnique,similarcarriesthescriptlanguageofJavaintheserveroftheNetscapecompanyofserver-sideJavaScript（SSJS）andtheActiveServerPages（ASP）oftheMicrosoft.JSPcomparestheSSJSandASPtohavebettercanexpandsex,anditisnomoreexclusivethananyfactoryorsomeoneparticularserverofWeb.ThoughthenormofJSPistobedrawupbySuncompanyof,anyfactorycancarryouttheJSPonownsystem.

TheAfterSunreleasetheJSP（theJavaServerPages）formally,thethiskindofnewWebapplicationdevelopmenttechniqueveryquicklycausedthepeople'

sconcern.JSPprovidedaspecialdevelopmentenvironmentfortheWebapplicationthatestablishesthehighdynamicstate.AccordingtotheSunparlance,theJSPcanadapttoincludetheApacheWebServer,IIS4.0onthemarketatinsideof85%serverproduct.

ThischapterwillintroducetherelatedknowledgeofJSPandDatabases,andJavaBeanrelatedcontents,isallcertainlyrougherintroductionamongthembasiccontents,sayperhapstoisaGuideonly,ifthereaderneedsthemoredetailedinformation,pleasingthebookofconsultthehomologousJSP.

1.1GENERALIZE

TheJSP（JavaServerPages）isfromthecompanyofSunMicrosystemsinitiate,themanycompaniestheparticipatetothebuildupthetogetheroftheakindtheofdynamicthestatewebthepagetechniquestandard,theithavetheitintheconstructiontheofthedynamicstatethewebpagethestrongbutthedonottheespeciallyofthefunction.JSPandthetechniqueofASPoftheMicrosoftareveryalike.BothallprovidetheabilitythatmixeswithacertainprocedurecodeandisexplainbythelanguageenginetocarryouttheprocedurecodeinthecodeofHTML.Underneathwearesimpleofcarryontheintroductiontoit.

JSPpagesaretranslatedintoservlets.So,fundamentally,anytaskJSPpagescanperformcouldalsobeaccomplishedbyservlets.However,thisunderlyingequivalencedoesnotmeanthatservletsandJSPpagesareequallyappropriateinallscenarios.Theissueisnotthepowerofthetechnology,itistheconvenience,productivity,andmaintainabilityofoneortheother.Afterall,anythingyoucandoonaparticularcomputerplatformintheJavaprogramminglanguageyoucouldalsodoinassemblylanguage.Butitstillmatterswhichyouchoose.

JSPprovidesthefollowingbenefitsoverservletsalone:

•ItiseasiertowriteandmaintaintheHTML.YourstaticcodeisordinaryHTML:

noextrabackslashes,nodoublequotes,andnolurkingJavasyntax.

•YoucanusestandardWeb-sitedevelopmenttools.EvenHTMLtoolsthatknownothingaboutJSPcanbeusedbecausetheysimplyignoretheJSPtags.

•Youcandivideupyourdevelopmentteam.TheJavaprogrammerscanworkonthedynamiccode.TheWebdeveloperscanconcentrateonthepresentationlayer.Onlargeprojects,thisdivisionisveryimportant.Dependingonthesizeofyourteamandthecomplexityofyourproject,youcanenforceaweakerorstrongerseparationbetweenthestaticHTMLandthedynamiccontent.

Now,thisdiscussionisnottosaythatyoushouldstopusingservletsanduseonlyJSPinstead.Bynomeans.Almostallprojectswilluseboth.Forsomerequestsinyourproject,youwilluseservlets.Forothers,youwilluseJSP.Forstillothers,youwillcombinethemwiththeMVCarchitecture.Youwanttheappropriatetoolforthejob,andservlets,bythemselves,donotcompleteyourtoolkit.

1.2SOURCEOFJSP

ThetechniqueofJSPofthecompanyofSun,makingthepageofWebdevelopthepersonnelcanusetheHTMLperhapsmarkingofXMLtodesigntoturntheendpagewithformat.UsetheperhapssmallscriptfuturelifeofmarkingofJSPbecomesthedynamicstateonthepagecontents.（thecontentschangesaccordingtotheclaimof）

TheJavaServletisatechnicalfoundationofJSP,andthelargeWebappliesthedevelopmentoftheproceduretoneedtheJavaServlettomatchwiththeJSPandthencancomplete,thisnameofServletcomesfromtheApplet,thelocaltranslationmethodofnowisalotof,thisbookinordernottomisconstruction,decidethedirectadoptionServletbutdon'

tdoanytranslation,ifreaderwouldliketo,cancallitas"

smallserviceprocedure"

.TheServletissimilartotraditionalCGI,ISAPI,NSAPIetc.Webproceduredevelopmentthefunctionofthetoolinfact,atusetheJavaServlethereafter,thecustomerneednotuseagainthelowlymethodofCGIofefficiency,alsoneednotuseonlytheabilitycometobornpageofWebofdynamicstateinthemethodofAPIthatacertainfixedWebserverterracecirculate.ManyserversofWeballsupporttheServlet,evennotsupporttheServletserverofWebdirectlyandcanalsopasstheadditionalappliedserverandthemoldpiecestosupporttheServlet.Receivebenefitinthecharacteristic（典型的）oftheJavacross-platform,theServletisalsoaterrace（平台）irrelevant,actually,aslongasmatchthenormofJavaServlet,theServletiscompletetohavenothingtodowithterraceandistohavenothingtodowithserverofWeb.BecausetheJavaServletisinternaltoprovidetheservicebythelinedistance,neednotstartaprogresstotheeachclaims,andmakeuseofthemulti-threadingmechanismcanatthesametimeforseveralclaimservice,thereforetheefficiencyofJavaServletisveryhigh.

ButtheJavaServletalsoisnottohasnoweakness,similartotraditionalCGI,ISAPI,theNSAPImethod,theJavaServletistomakeuseofoutputtheHTMLlanguagesentencetocarryoutthedynamicstatewebpageof,ifdevelopthewholewebsitewiththeJavaServlet,theintegration（集成）processofthedynamicstatepartandthestaticstatepageisanevil-forebodingdreamsimply.ForsolvingthiskindofweaknessoftheJavaServlet,theSUNreleasedtheJSP.

Anumberofyearsago,Martywasinvitedtoattendasmall20-personindustry（产业）roundtablediscussiononsoftwaretechnology.SittingintheseatnexttoMartywasJamesGosling,inventor（发明）oftheJavaprogramminglanguage.Sittingseveralseatsawaywasahigh-levelmanagerfromaverylargesoftwarecompanyinRedmond,Washington.Duringthediscussion,themoderatorbroughtupthesubjectofJini,whichatthattimewasanewJavatechnology.Themoderatoraskedthemanagerwhathethoughtofit,andthemanagerrespondedthatitwastooearlytotell,butthatitseemedtobeanexcellentidea.Hewentontosaythattheywouldkeepaneyeonit,andifitseemedtobecatchingon,theywouldfollowhiscompany'

susual"

embrace（信奉）andextend"

strategy（战略）.Atthispoint,Goslinglightheartedlyinterjected"

Youmeandisgrace（耻辱）anddistend（使扩张）."

Now,thegrievance（不满）thatGoslingwasairing（风干；

通风）wasthathefeltthatthiscompanywouldtaketechnologyfromothercompaniesandsuborn（收买）itfortheirownpurposes.Butguess（认为，猜测）what?

Theshoeisontheotherfoothere.TheJavacommunity（社区，团体）didnotinvent（发明，创造）theideaofdesigningpagesasamixture（混合）ofstaticHTMLanddynamiccodemarked（标记）withspecialtags（标签）.Forexample,ColdFusiondidityearsearlier.EvenASP（aproductfromtheverysoftwarecompanyoftheaforementionedmanager）popularizedthisapproach（方法）beforeJSPcamealonganddecidedtojumponthebandwagon（流行）.Infact,JSPnotonlyadoptedthegeneral（普通的）idea,itevenusedmanyofthesamespecialtagsasASPdid.

TheJSPisanestablishment（确定，制定）atthemodelofJavaservletsonoftheexpressionlayer（层）technique（技术）,itmakesplait（编）writetheHTMLtobecomemoresimple.BeliketheSSJS,italsoallows（允许）youcarrythestaticstateHTMLcontentsandserversthescript（脚本）mixtoputtogethertheborndynamicstateexportation（出口）.JSPthescriptlanguagethattheJavaisthetacit（缄默的，不言而喻的）approval（认可）,however,beliketheASPandcanuseotherlanguages（suchasJavaScriptandVBScript）,thenormofJSPalsoallowstouseotherlanguages.

1.3JSPCHARACTERISTICS

Isaserviceaccordingtothescriptlanguageinsomeonelanguageofthestaturessystemthiskindofdiscuss（论述）,theJSPshouldbeseemakeisakindofscriptlanguage.However,beakindofscriptlanguage,theJSPseemedtobetoostrongagain,almostcanuseallJavasintheJSP.

Beakindofaccordingtotextoriginally（最初）of,takemanifestation（表现）asthecentraldevelopmenttechnique,theJSPprovidedalladvantagesoftheJavaServlet,and,whencombinewithaJavaBeanstogether,providingakindofmakecontentsandmanifestationthatsimplewaythatlogic（逻辑）separate.Separatethecontentsandadvantageoflogicalmanifestationsis,thepersonnel（人员的）whorenews（更新）thepageexternal（外部的）appearance（外观）neednotknowthecodeofJava,andrenewtheJavaBeanspersonnelalsoneednotbedesignthewebpageofexpert（熟练的，专家）inhand,canusetotakethepageofJavaBeansJSPtodefinethetemplate（模板）ofWeb,tobuildupaformhavethealikeexternalappearanceofthewebsitethatpageconstitute（组成）.JavaBeanscompletes（完成）thedatatoprovide,havingnocodeofJavainthetemplatethus（因此）,thismeansthatthesetemplatescanbewrittenthepersonnelbyaHTMLplait（编）tosupport.Certainly,canalsomakeuseoftheJavaServlettocontrolthelogicofthewebsite,adjust（调整）throughtheJavaServlettousethewayofthedocumentofJSPtoseparatewebsiteoflogicandcontents.

Generallyspeaking,inactual（真实的，目前的）engine（引擎）ofJSP,thepageofJSPistheeditandtranslate（翻译，转化）typewhilecarryout,notexplainthetypeof.Explainthedynamicstatewebpagedevelopmenttoolofthetype,suchasASP,PHP3etc.,becausespeedetc.reason,havealreadycan'

tsatisfy（令人满意的）currentthelargeelectronic