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xml教材
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XML(eXtensible Markup Language)是一种用于标记数据的语言,它是HTML的补充,但更为灵活和强大。XML的设计目的是传输和存储数据,而非显示数据,因此它的重点在于数据的结构化,而非外观的呈现。XML的语法严格,使得数据在不同系统间交换变得简单和可靠。 XML的核心概念包括: 1. **元素(Element)**:XML文档的基本构建块,用尖括号包围,如`<element>`。元素可以包含文本、其他元素或两者都有。元素可以有属性,提供额外的信息。 2. **属性(Attribute)**:元素可以具有零个或多个属性,用于附加信息。例如,`<element attr="value">`。 3. **命名空间(Namespace)**:XML允许使用命名空间来避免元素和属性名的冲突,通过使用URI(Uniform Resource Identifier)来区分不同的命名空间。 4. **文档类型定义(DTD)**或**XML Schema**:定义XML文档结构的规则集,确保文档的合法性。DTD使用特定的语法来定义元素和属性,而XML Schema使用更现代的XML语法。 5. **解析器(Parser)**:XML解析器负责读取XML文档并将其转化为可操作的数据。有两种类型的解析器:DOM(Document Object Model)解析器将整个文档加载到内存中形成一个树形结构,而SAX(Simple API for XML)解析器则以事件驱动的方式处理文档。 在与JSP(JavaServer Pages)结合使用时,XML可以作为数据源,为动态网页提供内容。JSP可以通过Java代码处理XML,例如使用DOM或SAX解析器读取XML数据,然后将结果嵌入到HTML中。JSTL(JavaServer Pages Standard Tag Library)中的XML标签也可以简化这个过程,提供了一种在JSP页面上直接处理XML的简便方式。 此外,XSLT(eXtensible Stylesheet Language Transformations)是一种转换XML文档的样式表语言,可以将XML数据转换成其他格式,如HTML、PDF或另一种XML结构。XSLT的使用常常与XML和JSP结合,以改变XML数据的展现形式。 在学习XML时,理解其基本结构、解析方法和与服务器端技术(如JSP)的交互至关重要。掌握XML能够帮助开发者创建可扩展、可维护且跨平台的数据交换解决方案。在实际项目中,合理利用XML可以提高数据处理的灵活性和效率,是任何IT专业人员都应该掌握的重要技能之一。
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- woaixiaz2012-09-29挺全xml的教材,
- lazybones8905262013-05-08不错的xml教材,学习一下
- ddfisher2013-08-03看了这个,简单的xml我也可以看懂了,赞一个
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