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页数:14页
时间:2018-10-30
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1、职场大变样社区(www.zcdby.com):下载毕业设计成品全套资料,全部50元以下英文文献及中文翻译学生姓名学院专业指导教师学号:软件学院软件工程(电子商务方向)2014年6月Javaande-commerceTheJavaprogramminglanguageandplatformhaveemergedasmajortechnologiesforperforminge-businessfunctions.Javaprogrammingstandardshaveenabledportabilityofa
2、pplicationsandthereuseofapplicationcomponentsacrosscomputingplatforms.SunMicrosystems1JavaCommunityProcesscontinuestobeastrongbaseforthegrowthoftheJavainfrastructureandlanguagestandards.Thisgrowthofopenstandardscreatesnewopportunitiesfordesignersanddevelop
3、ersofapplicationsandservices.ApplicationsofJavaJavausesmanyfamiliarprogrammingconceptsandconstructsandallowsportabilitybyprovidingacommoninterfacethroughanexternalJavaVirtualMachine(JVM).Avirtualmachineisaself-containedoperatingenvironment,createdbyasoftwa
4、relayerthatbehavesasifitwereaseparatecomputer.Benefitsofcreatingvirtualmachinesincludebetterexploitationofpowerfulcomputingresourcesandisolationofapplicationstopreventcross-corruptionandimprovesecurity.TheJVMallowscomputingdeviceswithlimitedprocessorsormem
5、orytohandlemoreadvancedapplicationsbycallingupsoftwareinstructionsinsidetheJVMtoperformmostofthework.ThisalsoreducesthesizeandcomplexityofJavaapplicationsbecausemanyofthecorefunctionsandprocessinginstructionswerebuiltintotheJVM.Asaresult,softwaredevelopers
6、nolongerneedtore-createthesameapplicationforeveryoperatingsystem.Javaalsoprovidessecuritybyinstructingtheapplicationtointeractwiththevirtualmachine,whichservedasabarrierbetweenapplicationsandthecoresystem,effectivelyprotectingsystemsfrommaliciouscode.Among
7、otherthings,Javaistailor-madeforthegrowingInternetbecauseitmakesiteasytodevelopnew,dynamicapplicationsthatcouldmakethemostoftheInternet’spowerandcapabilities.Javaisnowanopenstandard,meaningthatnosingleentitycontrolsitsdevelopmentandthetoolsforwritingprogra
8、msinthelanguageareavailabletoeveryone.ThepowerofopenstandardslikeJavaistheabilitytobreakdownbarriersandspeedupprogress.Today,youcanfindJavatechnologyinnetworksanddevicesthatrangefromtheInternetandscientificsu
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