JAXP解析XML之SAX

JAXP解析XML之SAX
1.获取SAXParserFactory工厂类。
2.获取SAXParser解析器。
3.获取XMLReader读写器。
4.设置内容处理器reader.setContentHandler(myHandler);
5.读取XML文档内容reader.parse("src/school.xml");

<?xml version="1.0" encoding="UTF-8" standalone="no"?><school>
	<student>
		<sno>09060034289</sno>
		<name>犀利</name>
		<address>广西南宁</address>
	</student>
	<student>
		<sno>090600304210</sno>
		<name>小李</name>
		<address>日本</address>
	</student>
	
</school>

 

 

package com.dhcool;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.junit.Test;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

public class SaxTest {

	@Test
	public void saxTest() throws ParserConfigurationException, SAXException, IOException{
		//1.获取sax解析器工厂
		SAXParserFactory factory = SAXParserFactory.newInstance();
		//2.获取sax解析器
		SAXParser saxParser = factory.newSAXParser();
		//3.获取读写器
		XMLReader reader = saxParser.getXMLReader();
		
		MyHandler myHandler = new MyHandler();
		
		//4.设置内容处理器
		reader.setContentHandler(myHandler);
		
		//5.读取XML文档内容
		reader.parse("src/school.xml");
		
		//6.通过处理器获取list内容
		List<Student> list = myHandler.getList();
		System.out.println(list);
	}
}

class MyHandler extends DefaultHandler{
	
	private List<Student> list = new ArrayList<Student>();
	private Student student;
	private String currentTage;

	@Override
	public void startElement(String uri, String localName, String qName,
			Attributes attributes) throws SAXException {
		currentTage = qName;
		if("student".equals(currentTage)){
			student = new Student();
		}
	}
	
	@Override
	public void characters(char[] ch, int start, int length)
			throws SAXException {
		if("sno".equals(currentTage)){
			student.setSno(new String(ch,start,length));
		}
		
		if("name".equals(currentTage)){
			student.setName(new String(ch,start,length));
		}
		
		if("address".equals(currentTage)){
			student.setAddress(new String(ch,start,length));
		}
		
	}

	@Override
	public void endElement(String uri, String localName, String qName)
			throws SAXException {
		if("student".equals(qName)){
			list.add(student);
			student = null;
		}
		currentTage = null;
	}
	
	public List<Student> getList() {
		return list;
	}
	
}

 

 

 

package com.dhcool;

public class Student {

	private String sno;
	private String name;
	private String address;

	public String getSno() {
		return sno;
	}

	public void setSno(String sno) {
		this.sno = sno;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

}