XML SAX解析

person.xml
<?xml version="1.0" encoding="UTF-8" ?>
<persons>
    <person>
        <name>至尊宝</name>
        <age>9000</age>
    </person>
    <person>
        <name>白晶晶</name>
        <age>7000</age>
    </person>
</persons>




person.java
package com.bjsxt.xml;
public class Person {
    private String name;
    private int age;

    public Person() {
        // TODO Auto-generated constructor stub
    }
    public Person(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}



PersonHandler.java
package com.bjsxt.xml;
import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
 * 存储对象
 * @author Administrator
 */
public class PersonHandler extends DefaultHandler {
    private List<Person> persons;
    private Person person;
    private String tag;//记录标签名
    @Override
    public void startDocument() throws SAXException {
        // TODO Auto-generated method stub
        //System.out.println("处理文档开始");
        persons =new ArrayList<Person>();
    }
    @Override
    public void startElement(String uri, String localName, String qName,
            Attributes attributes) throws SAXException {
        System.out.println("开始一个元素" +qName);
        if(null!=qName){
            tag=qName;
        }
        if(null!=qName &&qName.equals("person")){
            person =new Person();
        }
    }
    @Override
    public void characters(char[] ch, int start, int length)
            throws SAXException {
        String str =new String(ch,start,length);
        if(null!=tag &&tag.equals("name")){
            //System.out.println(new String(ch,start,length));
            person.setName(str);
        }else if(null!=tag &&tag.equals("age")){
            Integer age = Integer.valueOf(str);
            person.setAge(age);
        }
    }
    @Override
    public void endElement(String uri, String localName, String qName)
            throws SAXException {
        //System.out.println("结束一个元素" +qName);
        if(qName.equals("person")){
            this.persons.add(person);
        }
        tag =null;
    }
    @Override
    public void endDocument() throws SAXException {
        System.out.println("文档处理结束");
    }
    public List<Person> getPersons() {
        return persons;
    }
    public void setPersons(List<Person> persons) {
        this.persons = persons;
    }   
}




ParseDemo01.java
package com.bjsxt.xml;
import java.io.IOException;
import java.util.List;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;
/**
 *解析
 */
public class ParseDemo01 {
    public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
        //1、获取解析工厂
        SAXParserFactory factory=SAXParserFactory.newInstance();
        //2、从解析工厂获取解析器
        SAXParser parse =factory.newSAXParser();
        //3、加载文档 Document 注册处理器
        //4、编写处理器
        PersonHandler handler=new PersonHandler();
        parse.parse(Thread.currentThread().getContextClassLoader()
                .getResourceAsStream("com/bjsxt/xml/person.xml")
                ,handler );

        List<Person> persons =handler.getPersons();
        for(Person p:persons){
            System.out.println(p.getName()+"-->"+p.getAge());
        }   
    }
}