毕业论文-XML 解析器分析研究.docVIP

毕 业 论 文 XML 解析器 摘 要 XML是当前最热门的网络技术之一，被称为“第二代Web语言”、“下一代网络应用的基石”。是一种置标语言，通过在数据中加入附加信息的方式来描述结构化数据。随着XML越来越广泛地被采用，高效解析XML文档也变得越来越重要，尤其是对于那些要处理大量数据的应用程序。不正确的解析会导致过度的内存消耗和过长的处理时间，从而有损于应用程序的可伸缩性，因此，选择正确的XML解析方法至关重要。可扩展符号化语言用于XML的简单API文档对象模型 Abstract XML（ eXtensible Markup Language） is one of the most popular network technologies at present, known as the second generation of Web language , foundation of network applications of future generation . It is a metal markup language which describes the structurization data by joining additional information in the data. The number of XML applications is growing all the time. Given the increasing importance of processing XML documents higher efficiently ,especially for the applications to dealing with a large amount of data. Incorrect parser will lead to the fact that the excessive memory will be consumed and pass for long treatment time, thus it impair application program can elasticity,so,choosing correct XML parser is very important . firstly, This paper introduces the way of developing XML parser and relevant background, then explains XML file structure and basic grammar of language, discusses different classification and usage of parser ,then paticularly compares the performance and functionality of the two most popular parser technology: DOM and SAX. finally ,this paper discribes my own designing of a small-scale Non-validating XML parser in detail,which mainly realizes key processor ContentHandler procedure of parser on the basis of SAX technology (use C ++ language). Keywords：eXtensible Markup Language（XML）,parser, Simple API for XML(SAX), Document Object Model（DOM） 目 录 摘 要 2 第一章 引 言 6 1.1 开发XML解析器的意义 6 1.2 XML解析器面临的现状 7 1.3 研究的内容和目标 7 1.4 小 结 8 第二章 XML语法 9 2.1 XML的基本结构 9 2.1.1 处理指令 10 2.1.2 注释 10 2.1.3 根元素和子元素 10 2.1.4 属性 10 2.2 XML的“良规性”和“有效性” 11 2.2.1 DTD 12 2.2.2 Schema 12 2.3 XML的名称空间 12 2.4 小 结 13 第三章 XML解析器 14 3.1 XML解析器的用途 14 3.2 XML解析器的种类 14 3.2.1 验证或非验证的解析器 14 3.2.2 支持不同解析接口的解析器 15 3.2.3