Java中的两种XML解析技术DOM和SAX

目标文件：D:/meno.xml

<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学</address>
<telphone>0439-31344532</telphone>
<email>wangping@sina.com</email>
<body>今天是王平生日</body>
</note>
<note type="shop">
<name>东方雪</name>
<sex>女</sex>
<date>8月23日</date>
<address>北京海淀区中关村E世界</address>
<telphone>15984561235</telphone>
<email>eworld@vip.com</email>
<body>今天是东方雪店铺开张的日子</body>
</note>
</memo>

DOM解析

步骤：

1.获取factory

DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();

2.获取builder

builder = builderFactory.newDocumentBuilder();

3.解析为Document对象

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();//获得根元素
System.out.println("根元素：" + root.getNodeName());
NodeList childNodes = root.getChildNodes();//获得根元素下的子节点
for (int i = 0; i < childNodes.getLength(); i++) {//遍历这些子节点
Node node = childNodes.item(i);
if("note".equals(node.getNodeName())) {
//如果节点的名称为"node",则输出note元素属性type
System.out.println("\r\n 找到一篇日记。所属分类：" + 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("性别：" + 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("电话号码：" + detail.getTextContent());
else if("email".equals(detail.getNodeName()))
System.out.println("E-mail: " + detail.getTextContent());
else if("body".equals(detail.getNodeName()))
System.out.println("主题：" + detail.getTextContent());

}
}

}

}
catch(Exception e) {
e.printStackTrace();
}
}
}

SAX解析

步骤：

1.获取factory

SAXParserFactory factory = SAXParserFactory.newInstance();

2.获取parser

SAXParser parser = factory.newSAXParser();

3.开始解析

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("性别：" + 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("电话号码:" + content);
}else if("email".equals(qName)) {
System.out.println("电子邮件：" + content);
}else if("body".equals(qName)) {
System.out.println("主题：" + content);
}
}

public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
if("note".equals(qName)) {
System.out.println("下面是一个关于SAX的解析方式：");
System.out.println("\r\n找到一篇文章.所属分类：" + attributes.getValue("type") + ".");
}
}
}

Java中的两种XML解析技术DOM和SAX

Java中的两种XML解析技术DOM和SAX

目标文件：D:/meno.xml

DOM解析

步骤：

1.获取factory

2.获取builder

3.解析为Document对象

SAX解析

步骤：

1.获取factory

2.获取parser

3.开始解析

解析结果

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