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1、JSPandWEBtechnology1JSPIntroductionJSP(JavaServerPages)isaJava-basedscriptingtechnology.IsadvocatedbySunMicrosystemsInc.,togetherwithanumberofcompaniesinvolvedintheestablishmentofadynamicwebpagetechnologystandards.JSPtechnologyissomewhatsimilartoASPtechnology,ItisatraditionalHTMLpagefil
2、e(*.htm,*.html)toinsertJavaprogramsegment(Scriptlet)andJSPtag(tag),ToformtheJSPfile(*jsp).WebdevelopmentwithJSPisacross-platformapplicationsthatcanrununderLinux,butalsoinotheroperatingsystems.IntheJSPofthemanyadvantages,oneofwhichisthatitwillbeHTMLencodedWebpagefromthebusinesslogicsepar
3、atedeffectively.JSPaccesswithreusablecomponents,suchasServlet,JavaBeanandJava-basedWebapplications.JSPalsosupportsdirectlyintheWebpageembeddedJavacode.JSPcanbeusedtwowaystoaccessdocuments:JSPdocumentssentbythebrowserrequest,therequestsenttotheServlet.JSPtechnologyusesJavaprogramminglang
4、uage,XML-typetagsandscriptlets,tohaveapackagedealwiththelogicofdynamicpages.Pagetagsandscriptletscanalsoexistintheserveraccesstotheresourcesoftheapplicationlogic.JSPlogicandWebpagedesignanddisplayisolatedandsupportreusablecomponent-baseddesign,Web-basedapplicationsmorequicklyandeasilyde
5、veloped.TheWebserverwhenmeetsvisitstheJSPhomepagetherequest,firstcarriesoutsegment,willthencarryouttheresultcodetoreturntogetherwithJSPinthedocumentHTMLforthecustomer.TheinsertionJavasegmentmayoperatethedatabase,againthedirectionalhomepageandsoon,realizesthefunctionwhichtheestablishment
6、dynamichomepageneeds.JSPandJavaServletarethesame,isintheserverendexecution,usuallyreturnstothisclientsideisaHTMLtext,thereforeclientside,solongashasthebrowsertobeabletoglanceover.TheJSPpageiscomposedoftheHTMLcodeandtheinsertingJavacode.Theserverinthepagebytheclientsidewasrequestedthatla
7、terwillcarryonprocessingtotheseJavacode,willthenproducetheHTMLpagewillreturngivestheclientsidethebrowser.JavaServletistheJSPtechnologybase,moreoverthelarge-scaleWebapplicationprocedure'sdevelopmentneedsJavaServletandtheJSPcoordinationcancomplete.JSPhadtheJavatechnologysimplyeas