计算机类外文翻译

大连交通大学2016届本科生毕业设计（论文）外文翻译1外文原文IntroducingJSP、JAVA、TomcatBy:GaryH.Sockut,BalakrishnaR.IyerSource:BeginningJSP,JSFandTomcatIntroducingJSPandTomcatInteractivityiswhatmakestheWebreallyuseful.Byinteractingwitharemoteserver,youcanfindtheinformationyouneed,keepintouchwithyourfriends,orpurchasesomethingonline.Andeverytimeyoutypesomethingintoawebform,anapplication“outthere”interpretsyourrequestandpreparesawebpagetorespond.1.InstallingJavaJavaServerPages(JSP)isatechnologythathelpsyoucreatesuchdynamicallygeneratedpagesbyconvertingscriptfilesintoexecutableJavamodules;JavaServerFaces(JSF)isapackagethatfacilitatesinteractivitywiththepageviewers;andTomcatisanapplicationthatcanexecuteyourcodeandactasawebserverforyourdynamicpages.EverythingyouneedtodevelopJSP/JSFwebapplicationsisavailableforfreedownloadfromtheInternet;buttoinstallallthenecessarypackagesandtoolsandobtainanintegrateddevelopmentenvironment,youneedtoproceedwithcare.Thereisnothingmoreannoyingthanhavingtodealwithincorrectlyinstalledsoftware.Whensomethingdoesn’twork,theproblemwillalwaysbedifficulttofind.Inthischapter,I’llintroduceyoutoJavaservletsandJSP,andI’llshowyouhowtheyworktogetherwithinTomcattogeneratedynamicwebpages.But,firstofall,IwillguideyouthroughtheinstallationofJavaandTomcat:therewouldn’tbemuchpointinlookingatcodeyoucan’texecuteonyourPC,wouldthere?You’llhavetoinstallmorepackagesasyouprogress.Dotheseinstallationscorrectly,andyouwillneverneedtosecondguessyourself.Intotal,youwillneedatleast300MBofdiskspaceforJavaandTomcataloneandtwiceasmuchspacetoinstalltheEclipsedevelopmentenvironment.Torunalltheexamplescontainedinthisbook,IusedaPCwitha2.6GHzAMDAthlon64x2(nothingfancy,nowadays)with1GBofmemoryandrunningWindowsVistaSP2.Beforeperforminganyinstallation,Ireformattedtheharddiskandre-installedtheOSfromtheoriginalDVD.Idon’tsuggestforamomentthatyoudothesame!Ididitfortwooppositebutequallyimportantreasons:first,Ididn’twantexistingstufftointerferewiththelatestpackagesneededforwebdevelopment;second,Ididn’twanttorelyonanythingalreadyinstalled.Iwantedtobesuretogiveyouthefulllistofwhatyouneed.大连交通大学2016届本科生毕业设计（论文）外文翻译22.InstallingTomcatThisistheJavawebserver,whichistheservletcontainerthatallowsyoutorunJSP.IfyouhavealreadyinstalledanolderversionofTomcat,youshouldremoveitbeforeinstallinganewversion.TomcatlistenstothreecommunicationportsofyourPC(8005,8009,and8080).BeforeyouinstallTomcat,youshouldcheckwhethersomealready-installedapplicationsarelisteningtooneormoreofthoseports.Todoso,openaDOSwindowandtypethecommandnetstat/a.Itwilldisplayalistofactiveconnectionsintabularform.Thesecondcolumnofthetablewilllooklikethis:LocalAddress0.0.0.0:1350.0.0.0:4450.0.0.0:3306Theportnumbersarethenumbersafterthecolon.IfyouseeoneormoreoftheportsTomcatuses,afterinstallingTomcat,youwillhavetochangetheportsitlistensto.Here’showtoinstallTomcat7correctly:(1).GototheURL(“QuickNavigation”),youwillseefourlinks:KEYS,7.0.26,Browse,andArchives.(2).Byclickingon7.0.26,youwillbetakentowardthebottomofthesamepagetoaheadingwiththesameversionnumber.Belowtheversionheading,youwillseethesubheading“Core”.Belowthat,immediatelyabovethenextsubheading,youwillseethreelinksarrangedasfollows:32-bit/64-bitWindowsServiceInstaller(pgp,md5).(3).Clickon32-bit/64-bitWindowsServiceInstallertodownloadthefile:apache-tomcat-7.0.26.exe(8.2MB).(4).Beforelaunchingtheinstallerfile,youhavetocheckitsintegrity.Todoso,youneedasmallutilitytocalculateitschecksum.ThereareseveralfreelyavailableontheInternet.IdownloadedWinMD5Freefrom’tmeanIconsideritbetterthananyothersimilarutility.ItjusthappenedtobethefirstoneIsaw.Theprogramdoesn’trequireanyspecialinstallation:justunzipitandlaunch.WhenyouopentheTomcatinstallerfile,youwillseea32-digithexadecimalnumberverymuchlikethis:8ad7d25179168e74e3754391cdb24679.(5).GobacktothepagefromwhichyoudownloadedtheTomcatinstallerandclickonthemd5link(thethirdone,andsecondwithintheparentheses).Thiswillopenapage大连交通大学2016届本科生毕业设计（论文）外文翻译3containingasinglelineoftext,likethis:8ad7d25179168e74e3754391cdb24679*apache-tomcat-7.0.26.exeIfthehexstringisidenticaltothatcalculatedbythechecksumutility,youknowthattheversionofTomcatinstalleryouhavedownloadedhasnotbeencorruptedormodifiedinanyway.(6).NowthatyouhaveverifiedthecorrectnessoftheTomcatinstaller,launchit.(7).Afteryou’veagreedtothetermsofthelicense,youwillthenseethedialogshowninFigure1-5.ClickontheplussignbeforetheTomcatitemandselect“Service”and“Native”asshowninthefigurebeforeclickingonthe“Next”button.(8).IchosetoinstallTomcatinthedirectory“C:\ProgramFiles\ApacheSoftwareFoundation\Tomcat”insteadofthedefault“Tomcat7.0”.Thisisbecausesometimesyoumightliketopointtothisdirectory(normallyreferredtoas%CATALINA_HOME%)fromwithinaprogram,andonedayyoumightreplaceTomcat7.0withTomcat8.0.BycallingTomcat’shomedirectory“Tomcat”youare“safe”foryearstocome.Youcanalsodecidetoleavethedefault.Ingeneral,byusingthedefaults,youarelikelytoencounterfewerproblems,becausethe