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1、实验三:DOM解析器的设计与实现学时：2目的： 了解DOM模型的原理掌握DOM模型的应用内容：采用 Eclipse IDE (或 MyEclipse)建立一个 XML 项目 编写相应的java类 利用JAXP完成一个DOM解析器的开发1.使用dom创建实验一完成的xml代码:import javax.xml.transform.*;import javax.xml.transform.stream.*;import javax.xml.transform.dom.*;import org.w3c.dom.*;import org.w3c.dom.bootstrap.DOMImplementat
2、ionRegistry;import org.w3c.dom.Is.DOMImplementationLS;import org.w3c.dom.Is.LSOutput;import org.w3c.dom.Is.LSSerializer;import javax.xml.parsers.*;import java.io.*;public class JAXPFirstLab public static void main(String args) String book_name = Struts 2.1权威指南，轻量级 Java EE企业开 发实战;String book_author =
3、 n李冈1J,李冈1J ， double book_price = 79.00,89;String book_desc = 该书详细介绍了Struts 2.1的用法，该书主要 介绍了一种流行的轻S:级企业应用架构;DocumentBuilderFactory factory =DocumentBuilderFactory.newlnstance();try DocumentBuiIder domParse = factory.newDocumentBuilder(); Document document = domParse.newDocument(); document-setXmlVers
4、ion (1.0);Element root = document.createElement(books”)； document-appendChild(root);for (int i = 1; i = book_namelength; i+)Node node = document.createElement(nITBook); root.appendChild(node);NodeList nodeList =document.getElementsByTagName(nITBook);int size = nodeList.getLength(); for (int i = 0; i
5、 size; i+)Node node = nodeListitem(i);if(node.getNodeType() = Node.ELEMENT_NODE)Element elementNode = (Element)node;Node nodeName =document-createElement(bookname”)；Node nodeAuthor =document-createElement(book_author);Node nodePrice =document.createElement(nbook_priceH);Node nodeDesc =document.creat
6、eElement(nbook_descn);nodeName.appendChild(document.createTextNode(book_namei);nodeAuthor.appendChild(document.createTextNode(book_authori)；nodePrice.appendChild(document.createTextNode(book_pricei+)；nodeDesc.appendChild(document.createTextNode(book_desci);elementNode.appendChild(nodeName); elementN
7、ode.appendChild(nodeAuthor); elementNode.appendChild(nodePrice); elementNode.appendChild(nodeDesc);DOMImplementationRegistry registry =DOMImplementationRegistry.newlnstance);DOMImplementationLS domlmplLs =(DOMImplementationLS)registry.getDOMImplementation(LS);LSSerializer serializer = domlmplLs.crea
8、teLSSerializer();serializer . getDomConf ig () . setParameter ( format-pretty-print，true);LSOutput out = domlmplLs . createLSOutput (); out.setEncoding(HGB2312 n);FileWriter stringOut = new FileWriter (f,books._new. xmln ); out.setCharacterStream(stringOut); serializerwrite(document, out); catch (Ex
9、ception e) / TODO Auto-generated catch block e.printStackTrace ();实验截图x newXML.xml x, student.xml2) JAXPFirstLab.java Jt books_new.xml， e Struts 2. 1 权威指i/book_namebook author： $0O79.0ig书洋细介诏了 St ruts 2.法e book_author :李 0J89.0该书王要介诏了一种茂行698置企业应用架构 國 2.使用dom删除xml其中一条（特 定条件）的信息删除书名为Struts 2.1权威指南 的这条
10、书的全部记录public static void delete()tryDocumentBuilderFactory factory = DocumentBuilderFactory .neA/lnstance();factory.setlgnoringElementContentWhitespace(true);DocumentBuilder builder = factory.newDocumentBuilder();Document document = builder.parse(books_new.xml);/先找到要删除的节点NodeList authors = document.
11、getElementsByTagName(Hbook-nameH)；/通过这个节点找到他的父亲节点，再通过父亲节点删除当前节点for (int i = 0; i authors.getLength(); i+) Node node = authors.item(i);System.outprintlnfnode.getTextContentO); if(node.getTextContent().equals(Struts 2.1 权威指南)Node book = node.getParentNodef); book.getParentNode().removeChild(book);DOMI
12、mplementationRegistry registry = DOMImplementationRegistry.new/nstonceO; DOMImplementationLSdomlmpILs(DOMImplementationLS)registry.getDOMImplementation(f,LSH)；LSSerializer serializer = domlmpILs.createLSSerializer(); serializer.getDomConfig().setParameter(format-pretty-print, true);LSOutput out = do
13、mlmpILs.createLSOutput();out.setEncoding(GB2312);FileWriter stringOut = new FileWriter(,books_new_Update.xmr,); out.setCharacterStream(stringOut); serializer.writefdocument, out); catch (Exception e) / TODO: handle exception实验截图：jc newXML.xml x student.xml?) JAXPFirstLab.java Lx books.new_Update.xml 23e book_name轻量级Java EE企业开发5K 李期89.0boo(desc该书主要介沼了一种云行的轻量级企业应用架构
