schema文件
<?xml version="1.0" encoding="UTF-8"?> <schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.example.org/book" xmlns:book="http://www.example.org/book" elementFormDefault="qualified"> <!--创建books根元素--> <element name="books"> <complexType> <sequence> <element name="book" maxOccurs="unbounded" minOccurs="1"> <complexType> <sequence> <element name="name" type="string"/> <element name="author" type="string" maxOccurs="2"/> <element name="price" type="decimal"/> <element name="date" type="date"/> <element name="pageNumbers" type="int" minOccurs="0" maxOccurs="2"/> </sequence> <attribute name="id" type="ID" use="required"/> <attribute name="name" type="string"/> </complexType> </element> </sequence> </complexType> </element> </schema>
<?xml version="1.0" encoding="UTF-8"?> <books xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.example.org/book" xmlns:book="http://www.example.org/book" xsi:schemaLocation="http://www.example.org/book book.xsd"> <book:book id="CSN001" name="图书1"> <book:name></book:name> <book:author>图书作者1</book:author> <book:author>图书作者</book:author> <book:price>66.6</book:price> <book:date>1966-10-22</book:date> <book:pageNumbers>1</book:pageNumbers> </book:book> </books>
xml解析
<?xml version="1.0" encoding="UTF-8"?> <dataSources> <!-- 定义MySQL数据源 --> <dataSource id="mysql" class="xxx.xxx.xx"> <property name="driverClassName">com.mysql.jdbc.Driver</property> <property name="url">jdbc:mysql://127.0.0.1:3306/userdb</property> <property name="username">root</property> <property name="password">123</property> </dataSource> <!-- 定义Oracle的数据源 --> <dataSource id="oracle" class="xxx.xxx.xx"> <property name="driverClassName">com.oracle.jdbc.OracleDriver</property> <property name="url">jdbc:oracle:thin:@127.0.0.1:1521:ORCL</property> <property name="username">scott</property> <property name="password">tiger</property> </dataSource> </dataSources>
package com.demo.dom; import java.io.InputStream; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; /** * 使用DOM解析XML文件 * * 把XML文件转换后为流程在把流在内存中构建一个DOM模型，使用对应API操作DOM树 * * @author Administrator * */ public class DOMParser { public static void main(String[] args) { long start = System.nanoTime(); try { // 创建一个文档构建工厂对象 DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); // 通过工厂对象创建一个文档构建对象 DocumentBuilder documentBuilder = builderFactory.newDocumentBuilder(); // 吧XML转换为输入流操作 InputStream inputStream = DOMParser.class.getClassLoader().getResourceAsStream("datasource.xml"); // 通过文档构建对象构建一个文档对象 Document document = documentBuilder.parse(inputStream); // 获取文档中的根元素 Element rootElement = document.getDocumentElement(); // 获取根元素先所有dataSource子节点 NodeList nodeList = rootElement.getChildNodes(); for (int i = 0; i < nodeList.getLength(); i++) { /** * 3: 换行节点->文本节点 8: 注释节点 1: 元素节点 */ Node node = nodeList.item(i); // 判断元素节点才操作 if (Node.ELEMENT_NODE == node.getNodeType()) { // 读取属性节点的值 String clazz = node.getAttributes().getNamedItem("class").getNodeValue(); String id = node.getAttributes().getNamedItem("id").getNodeValue(); System.out.println("class="+clazz); System.out.println("id="+id); // 获取元子节点 NodeList datasourceNodes = node.getChildNodes(); for (int j = 0; j < datasourceNodes.getLength(); j++) { Node dataSourceNode = datasourceNodes.item(j); if (Node.ELEMENT_NODE == dataSourceNode.getNodeType()) { // 获取属性的值 String nameValue = dataSourceNode.getAttributes().getNamedItem("name").getNodeValue(); String contentValue = dataSourceNode.getTextContent(); System.out.println(nameValue+"="+contentValue); } } } } } catch (Exception e) { e.printStackTrace(); } long end = System.nanoTime(); System.out.println(end - start); } }
package com.demo.sax; import java.io.InputStream; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; import com.demo.dom.DOMParser; /** * Sax解析 * * @author Administrator * */ public class SaxParserDemo { public static void main(String[] args) { long start = System.nanoTime(); // 创建一个Sax工厂对象->工厂设计 SAXParserFactory factory = SAXParserFactory.newInstance(); try { // 创建解析器 SAXParser saxParser = factory.newSAXParser(); // 吧XML转换为输入流操作 InputStream inputStream = DOMParser.class.getClassLoader().getResourceAsStream("datasource.xml"); saxParser.parse(inputStream, new DefaultHandler() { //解析开始标题文档 public void startDocument() throws SAXException { System.out.println("<?xml version= 1.0 encoding= utf-8 ?>"); } //解析节点 @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { System.out.print("<"+qName+" "); for (int i = 0; i < attributes.getLength(); i++) { System.out.print(attributes.getQName(i)+"="+attributes.getValue(i)+" "); } System.out.print(">"); } @Override //解析结束 public void endElement(String uri, String localName, String qName) throws SAXException { System.out.print("</"+qName+">"); } @Override //解析内容 public void characters(char[] ch, int start, int length) throws SAXException { String string = new String(ch, start, length); System.out.print(string); } }); } catch (Exception e) { e.printStackTrace(); } long end = System.nanoTime(); System.out.println(end - start); } /** * 定义默认处理的内部类 * @author Administrator * */ private static class XMLHanlder extends DefaultHandler { @Override public void startDocument() throws SAXException { System.out.println("解析开始"); } @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { System.out.println("开始解析元素"+qName); System.out.println(attributes.getValue("id")); System.out.println(attributes.getValue("class")); } @Override public void endElement(String uri, String localName, String qName) throws SAXException { System.out.println("解析结束"); } @Override public void characters(char[] ch, int start, int length) throws SAXException { System.out.println("解析内容"); System.out.println(new String(ch,start, length)); } } }