Java XML教程(附:源程序)

sonnet.XML 这是在本教程中贯穿使用的示例 XML 文档。 <?XML version="1.0"?> <!DOCTYPE sonnet SYSTEM "sonnet.dtd"> <sonnet type="Shakespearean"> <author> <last-name>Shakespeare</last-name> <first-name>William</first-name> <nationality>British</nationality> <year-of-birth>1564</year-of-birth> <year-of-death>1616</year-of-death> </author> <title>Sonnet 130</title> <text> <line>My mistress` eyes are nothing like the sun,</line> <line>Coral is far more red than her lips red.</line> <line>If snow be white, why then her breasts are dun,</line> <line>If hairs be wires, black wires grow on her head.</line> <line>I have seen roses damasked, red and white,</line> <line>But no sUCh roses see I in her cheeks.</line> <line>And in some perfumes is there more delight</line> <line>Than in the breath that from my mistress reeks.</line> <line>I love to hear her speak, yet well I know</line> <line>That music hath a far more pleasing sound.</line> <line>I grant I never saw a goddess go,</line> <line>My mistress when she walks, treads on the ground.</line> <line>And yet, by Heaven, I think my love as rare</line> <line>As any she belied with false compare.</line> </text> </sonnet> sonnet.dtd 这是我们示例文档所用的 DTD。  <!ELEMENT sonnet (author,title?,text) > <!ATTLIST sonnet type (Shakespearean Petrarchan) "Shakespearean"> <!ELEMENT text (line,line,line,line, line,line,line,line, line,line,line,line, line,line) > <!ELEMENT author (last-name,first-name,nationality, year-of-birth?,year-of-death?) > <!ELEMENT title (<!ELEMENT last-name (<!ELEMENT first-name (<!ELEMENT nationality (<!ELEMENT year-of-birth (<!ELEMENT year-of-death (<!ELEMENT line ( domOne.Java 这是我们的第一个 DOM 应用。它解析一个 XML 文档并将其内容输出到标准输出。 /* * (C) Copyright IBM Corp. 1999 All rights reserved. * * US Government Users Restricted Rights Use, duplication or * disclosure restricted by GSA ADP Schedule Contract with IBM Corp. * * The program is provided "as is" without any warranty eXPress or * implied, including the warranty of non-infringement and the implied * warranties of merchantibility and fitness for a particular purpose. * IBM will not be liable for any damages suffered by you as a result * of using the Program. In no event will IBM be liable for any * special, indirect or consequential damages or lost profits even if * IBM has been advised of the possibility of their occurrence. IBM * will not be liable for any third party claims against you. */ import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import org.w3c.dom.Attr; import org.w3c.dom.Document; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import com.ibm.XML.parsers.*; /** * domOne.java * Illustrates how to go through a DOM tree. */ public class domOne { public void parseAndPrint(String uri) { Document doc = null; try { DOMParser parser = new DOMParser(); parser.parse(uri); doc = parser.getDocument(); } catch (Exception e) { System.err.println("Sorry, an error occurred: " + e); } // We`ve parsed the document now, so let`s print it. if (doc != null) printDOMTree(doc); } /** Prints the specified node, then prints all of its children. */ public void printDOMTree(Node node) { int type = node.getNodeType(); switch (type) { // print the document element case Node.DOCUMENT_NODE: { System.out.println("<?XML version="1.0" ?>"); printDOMTree(((Document)node).getDocumentElement()); break; } // print element with attributes case Node.ELEMENT_NODE: { System.out.print("<"); System.out.print(node.getNodeName()); NamedNodeMap attrs = node.getAttributes(); for (int i = 0; i < attrs.getLength(); i++) { Node attr = attrs.item(i); System.out.print(" " + attr.getNodeName() + "="" + attr.getNodeValue() + """); } System.out.println(">"); NodeList children = node.getChildNodes(); if (children != null) { int len = children.getLength(); for (int i = 0; i < len; i++) printDOMTree(children.item(i)); } break; } // handle entity reference nodes case Node.ENTITY_REFERENCE_NODE: { System.out.print("&"); System.out.print(node.getNodeName()); System.out.print(";"); break; } // print cdata sections case Node.CDATA_SECTION_NODE: { System.out.print("<![CDATA["); System.out.print(node.getNodeValue()); System.out.print("]]>"); break; } // print text case Node.TEXT_NODE: { System.out.print(node.getNodeValue()); break; } // print processing instruction case Node.PROCESSING_INSTRUCTION_NODE: { System.out.print("<?"); System.out.print(node.getNodeName()); String data = node.getNodeValue();