XML-03总结---SAX方式解析XML------------03-优快云博客

本文介绍了一个使用Java SAX解析器从XML文件中读取学生信息的例子。该程序定义了一个Student类来存储学生信息，并通过SAX解析器实现了对学生数据的解析与存储。

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<?xml version="1.0" encoding="UTF-8"?>
<students>
<student  id="001" xx="嘻嘻">
	<name>林明</name>
	<sex>男</sex>
	<age>26</age>
</student>
<student id="002" xx="嘻嘻">
	<name >黄亮</name>
	<sex>男</sex>
	<age>21</age>
</student>
</students>


public class Student {

		private String id;
		private String name;
		private String sex;
		private int age;
		public String getId() {
			return id;
		}
		public void setId(String id) {
			this.id = id;
		}
		public String getName() {
			return name;
		}
		public void setName(String name) {
			this.name = name;
		}
		public String getSex() {
			return sex;
		}
		public void setSex(String sex) {
			this.sex = sex;
		}
		public int getAge() {
			return age;
		}
		public void setAge(int age) {
			this.age = age;
		}
		@Override
		public String toString() {
			// TODO Auto-generated method stub
			return this.id+","+this.name+","+this.sex+","+this.age;
		}
		
}

import java.util.ArrayList;
import java.util.List;

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.java.model.Student;

public class SAX02 extends DefaultHandler{
	private List<Student> students=null;
	private Student student=null;
	private String preTag=null;//标记上一个节点名称
	@Override
	public void startDocument() throws SAXException {
		System.out.println("开始读取学生信息");
		students=new ArrayList<Student>();
	}

	@Override
	public void endDocument() throws SAXException {
		System.out.println("\n 学生信息读取完毕");	
		
	}

	@Override
	public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
		if("student".equals(qName)){
			student=new Student();
			student.setId(attributes.getValue(0));
		}
		preTag=qName;
	}

	@Override
	public void endElement(String uri, String localName, String qName) throws SAXException {
		if("student".equals(qName)){
			students.add(student);
			student=null;
		}
		preTag=null;
	}

	@Override
	public void characters(char[] ch, int start, int length) throws SAXException {
		if(preTag!=null){
			String content=new String(ch,start,length);
			if("name".equals(preTag)){
				student.setName(content);
			}else if("sex".equals(preTag)){
				student.setSex(content);
			} else if("age".equals(preTag))
				student.setAge(Integer.parseInt(content));
		}
	}
	public static void main(String[] args) throws Exception{
		SAXParserFactory factory=SAXParserFactory.newInstance();
		SAXParser parser=factory.newSAXParser();
		SAX02 sax02=new SAX02();
		parser.parse("src/students.xml",sax02);
		System.out.println(sax02.students);
		for(Student s:sax02.students){
			System.out.println(s);
		}
	}
}

开始读取学生信息

 学生信息读取完毕
[001,林明,男,26, 002,黄亮,男,21]
001,林明,男,26
002,黄亮,男,21