Java中的兩種XML解析技術DOM和SAX
目標文件：D:/meno.xml
<?xml version="1.0" encoding="GB2312"?>
- <memo>
- <note type="birthday">
- <name>王平</name>
- <sex>男</sex>
- <date>12月23日</date>
- <address>吉林省白山市第八中學</address>
- <telphone>0439-31344532</telphone>
- <email>[email protected]</email>
- <body>今天是王平生日</body>
- </note>
- <note type="shop">
- <name>東方雪</name>
- <sex>女</sex>
- <date>8月23日</date>
- <address>北京海淀區中關村E世界</address>
- <telphone>15984561235</telphone>
- <email>[email protected]</email>
- <body>今天是東方雪店鋪開張的日子</body>
- </note>
- </memo>
DOM解析
步驟：
1.獲取factory
DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
2.獲取builder
builder = builderFactory.newDocumentBuilder();
3.解析爲Document對象
Document document = builder.parse(xmlFile);
- import java.io.File;
- 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;
- public class DomTest {
- public static void main(String[] args) {
- File xmlFile = new File("D:\\memo.xml");
- DocumentBuilder builder = null;
- DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
- try {
- builder = builderFactory.newDocumentBuilder();
- Document document = builder.parse(xmlFile); //解析文件
- Element root = document.getDocumentElement(); //獲得根元素
- System.out.println("根元素：" + root.getNodeName());
- NodeList childNodes = root.getChildNodes(); //獲得根元素下的子節點
- for (int i = 0; i < childNodes.getLength(); i++) { //遍歷這些子節點
- Node node = childNodes.item(i);
- if("note".equals(node.getNodeName())) {
- //如果節點的名稱爲"node",則輸出note元素屬性type
- System.out.println("\r\n 找到一篇日記。所屬分類：" + node.getAttributes().getNamedItem("type").getNodeValue()+".");
- NodeList nodeDetail = node.getChildNodes();
- for(int j = 0; j < nodeDetail.getLength(); j++)
- {
- Node detail = nodeDetail.item(j);
- if("name".equals(detail.getNodeName()))
- System.out.println("姓名: " + detail.getTextContent());
- else if("sex".equals(detail.getNodeName()))
- System.out.println("性別：" + detail.getTextContent());
- else if("date".equals(detail.getNodeName()))
- System.out.println("日期：" + detail.getTextContent());
- else if("address：".equals(detail.getNodeName()))
- System.out.println("居住地址：" + detail.getTextContent());
- else if("telephone".equals(detail.getNodeName()))
- System.out.println("電話號碼：" + detail.getTextContent());
- else if("email".equals(detail.getNodeName()))
- System.out.println("E-mail: " + detail.getTextContent());
- else if("body".equals(detail.getNodeName()))
- System.out.println("主題：" + detail.getTextContent());
- }
- }
- }
- }
- catch(Exception e) {
- e.printStackTrace();
- }
- }
- }
SAX解析
步驟：
1.獲取factory
SAXParserFactory factory = SAXParserFactory.newInstance();
2.獲取parser
SAXParser parser = factory.newSAXParser();
3.開始解析
parser.parse(xmlFile,new MySaxListener());
- import java.io.File;
- import javax.xml.parsers.SAXParser;
- import javax.xml.parsers.SAXParserFactory;
- public class SaxTest {
- public static void main(String[] args) {
- File xmlFile = new File("D:\\memo.xml");
- SAXParserFactory factory = SAXParserFactory.newInstance();
- try {
- SAXParser parser = factory.newSAXParser();
- parser.parse(xmlFile,new MySaxListener());
- } catch(Exception e) {
- e.printStackTrace();
- }
- }
- }
- import org.xml.sax.helpers.DefaultHandler;
- import java.text.DateFormat;
- import java.text.SimpleDateFormat;
- import org.xml.sax.Attributes;
- import org.xml.sax.SAXException;
- public class MySaxListener extends DefaultHandler {
- private String content;
- public void characters(char[] ch, int start, int length) throws SAXException {
- content = new String(ch, start, length);
- }
- public void endElement(String uri, String localName, String qName) throws SAXException {
- if("name".equals(qName)) {
- System.out.println("姓名：" + content);
- } else if("sex".equals(qName)) {
- System.out.println("性別：" + content);
- }else if("date".equals(qName)) {
- System.out.println("日期：" + content);
- }else if("address".equals(qName)) {
- System.out.println("居住地址：" + content);
- }else if("telephone".equals(qName)) {
- System.out.println("電話號碼:" + content);
- }else if("email".equals(qName)) {
- System.out.println("電子郵件：" + content);
- }else if("body".equals(qName)) {
- System.out.println("主題：" + content);
- }
- }
- public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
- if("note".equals(qName)) {
- System.out.println("下面是一個關於SAX的解析方式：");
- System.out.println("\r\n找到一篇文章.所屬分類：" + attributes.getValue("type") + ".");
- }
- }
- }
解析結果
