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vXML数据装入关系数据库的软件毕业论文.doc

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vXML数据装入关系数据库的软件毕业论文.doc

北京工业大学毕业设计(论文)1摘要随着Internet的发展和人们对数据标准性、平台无关性的要求越来越高,XMLExtensibleMarkupLanguage得到了广泛的应用,同时人们对于XML的存储方式提出了更高的要求。本课题意在设计一种将XML数据存入关系数据库中的方法,并按照该方法开发一个XML数据装入关系数据库的软件。本文首先对XML的基本知识进行介绍,随后讨论用关系数据库存储XML数据的原因,并对目前已经提出的一些XML文档在关系数据库中的存储方式进行研究讨论,在此基础上提出一个无模式的XML文档对于关系数据库的存储方法。这个方法将XML数据分为文档、元素、属性、文本四种节点,并将这四种节点映射为数据库中四个关系表。另外将DOM树中的元素节点关系映射为一个数据库关系表,这五个表是本课题中数据库设计的核心。五个表中包含的属性信息要求方便于DOM接口和SAX接口两种方式访问。提出存储方法后,我们将利用这种存储方法开发一个关系数据库中XML数据装入系统。文章后半部分将详细说明该软件的需求分析、设计、具体开发细节以及测试。该软件的测试结果验证了这种存储方法能够有效的将无模式的XML文档存入关系数据库。关键词关系数据库、XML北京工业大学毕业设计(论文)2AbstractWiththedevelopmentofInternetandthepeopleshigherandhigherrequirementfordatasstandardizationanditsindependentofplatform,XMLextensiblemarkuplanguageiswidelyused,inthemeantimethehigherrequirementforthestorageofXMLdataisasked.ThisresearchgroupdesignedamethodtostoreXMLdataintoRDBRelationalDataBaseofwhichthetechnologyhavebeenverymatureandwidelyused.ThenwedevelopedanapplicationthatcanstoretheXMLdataintoRDBusingthismethod.AtfirstthisarticlewillintroducebasicalknowledgeofXML,andthendiscusswhystoreXMLdatausingRDB.AfterthatwellresearchanddiscussthesomemethodsforstoringXMLdataintoRDBthathavebeenputforward.BasedonthemwelldesignastoragemethodfromnonschemaXMLdatatoRDB.WeclassifiedXMLdataasfourkindofnodessuchasDocument,Element,AtributeandText.ThesefournodesaremappedtofourtablesintheRDBandwemappedtheDOMTreeintoatabletoo.ThefivetablesisthecoreoftheRDBdesign.TheattributeinformationinvolvedinthetablesisrequiredthatbothDOMandSAXinterfacecanbeeasytogetinformationfromthetables.AftergivingthemethodwedesignedwelldevelopanapplicationthatcanstoringtheXMLdataintoRDBusingthatmethod.Itsrequirementanalyse,designdetailsandtestresultwellbedescribedinthesecondhalfpartofthearticle.ThetestresultwillshowthatusingthestoragemethodwecanstoringthenonschemaXMLdataintotheRDBeffectively.KeywordsRDBRelationalDataBase,XML北京工业大学毕业设计(论文)3目录摘要...............................................................................................................................................1Abstract..........................................................................................................................................2目录.........................................................................................................................................31绪论.........................................................................................................................................51.1课题背景及研究意义..........................................................................................................51.2XML知识简介...................................................................................................................51.2.1XML............................................................................................................................51.2.2DTD和Schema.........................................................................................................71.2.3DOM..........................................................................................................................71.2.4SAX...........................................................................................................................81.3基于关系数据库的XML存储技术....................................................................................91.3.1现存的基于关系数据库的XML存储技术..................................................................101.3.2一个模式驱动映射实例............................................................................................101.4作者的工作.........................................................................................................................111.5本章小结.............................................................................................................................112无模式映射的设计...................................................................................................................122.1方案设计要求.......................................................................................................................122.2设计思想..............................................................................................................................122.3方案详细设计.......................................................................................................................122.3.1ER图实体集中只画主码.......................................................................................132.3.2实体集和联系...........................................................................................................132.3.3设计方法与策略........................................................................................................142.3.4数据库基本表设计....................................................................................................162.3.5数据库优化................................................................................................................162.3.6数据字典...................................................................................................................162.4本章总结........................................................................................................................183关系数据库中XML装入系统...................................................................................................193.1任务概述.............................................................................................................................193.2设计思想概述......................................................................................................................193.3需求规定.............................................................................................................................203.3.1系统用例图...............................................................................................................203.3.2用例事件流...............................................................................................................203.3.3开发环境需求...........................................................................................................213.4系统设计.............................................................................................................................213.4.1系统体系结构...........................................................................................................213.4.2序列图设计...............................................................................................................213.4.3类设计......................................................................................................................233.4.4类关系图..................................................................................................................293.4.5算法的实现策略........................................................................................................303.4.6异常处理..................................................................................................................31北京工业大学毕业设计(论文)43.5系统测试.............................................................................................................................323.5.1系统功能测试...........................................................................................................323.5.2测试总结..................................................................................................................373.5.3与模式映射XMLRDB装入系统的分析对比..............................................................383.6本章小节.............................................................................................................................38结论.............................................................................................................................................39致谢.............................................................................................................................................40参考文献.......................................................................................................................................41

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