JSP best practices 外文资料翻译.doc

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1、沈阳航空工业学院毕业设计（论文）JSPbestpracticesJavaServerPages(JSPs)technologyisanextensionofJavaservlettechnologyandcombinesHTMLandJavacodeintoasinglefile.WhileJavaservlettechnologyfocusesonJavaclassescapableofgeneratingHTMLoutputwithPrintWriter.println()statements,JSPtechnologyabstractsthisconcepttoahigherlev

2、el.WithJavaServerPages,aWebdevelopercanwritestaticHTMLpagesandsimplyaddJavacodeinthosesectionsofthepagethatneedtobedynamicallygenerated.WhilethisflexibilityenablesrapiddevelopmentofsimpleWebapplications,itcanbeabused,resultinginunnecessarilycomplexapplicationsthataredifficulttomaintain,reuse,ande

3、nhance.Toavoidneedlesslycomplexapplications,followthepracticesIpresentinthisarticle:1.SeparateHTMLfromJava2.PlacebusinesslogicinJavaBeans3.Factorgeneralbehavioroutofcustomtaghandlerclasses4.FavorHTMLinJavahandlerclassesoverJavainJSPs5.Useanappropriateinclusionmechanism6.UseaJSPtemplatemechanism7.

4、Usestylesheets8.UsetheMVCpattern9.Useavailablecustomtaglibraries10.UseJSPcommentsinmostcases11.FollowHTMLbestpractices12.UtilizetheJSPexceptionmechanismThesetipswillhelpyouwriteJSPsthatarereusableandeasytomaintain.(1)SeparateHTMLfromJavaItcanbetemptingtothrowallJavaandHTMLcodenecessaryforaWebpage

5、intoasingleJSPfile.Insimplesystemdevelopment,suchanapproachmakesiteasyforsomeonenewtothesystemtolocateallrelevantcodeinoneplaceandunderstandhowit11沈阳航空工业学院毕业设计（论文）allinteracts.However,thisapproachbecomesburdensomeandcostlywhentheapplicationgrowsmorecomplexandmoredevelopersbecomeinvolved.Combining

6、HTMLandJavainthesamesourcecodecanmakethecodesignificantlylessreadable.Toenhancesoftwarereadability,developersoftenuseindentation;butmixingHTMLandJavascriptletsinthesamefilecanmakeusefulindentationextremelydifficulttomaintain.ManyWebdevelopmentmethodologiesandarchitecturesnowemphasizetheseparation

7、ofHTMLfromJavacodesodifferentdeveloperscanfocusontheirstrengths.ProperlyseparatingJavaandHTML,includingHTML-likeJSPtagsandcustomtags,allowsWebdesignersandHTMLcoderstoworkontheHTML(presentation)aspects,whileJavadevelope