JAVA两种XML解析方式 SAX和DOM

Person实体类：

package com.icss.bean;

public class Person {
    private int id;
    private String name;
    private int age;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    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;
    }
    public Person(int id, String name, int age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }
    public Person() {
        super();
    }
    @Override
    public String toString() {
        return "id="+id+"  name="+name+"  age="+age;
    }


    
}

SAX解析方式  SAX帮助类：

package com.icss.biz;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import com.icss.bean.Person;

public class SaxHelper<T> extends DefaultHandler {
    private List<Person> list;
    private Person p;
    String nameflag;


    public List<Person> getList() {
        return this.list;
    }

    @Override
    public void startDocument() throws SAXException {
        this.list = new ArrayList<Person>();
    }

    @Override
    public void endDocument() throws SAXException {
    }

    @Override
    public void startElement(String uri, String localName, String qName,
            Attributes attributes) throws SAXException {
        if (qName.equals("person")) {
            p = new Person();
            p.setId(new Integer(attributes.getValue("id")));
        }
        this.nameflag=qName;
    }

    @Override
    public void endElement(String uri, String localName, String qName)
            throws SAXException {
        if (qName.equals("person")) {
            if (p != null) {
                list.add(p);
            }
        }
        nameflag="";
    }

    @Override
    public void characters(char[] ch, int start, int length)
            throws SAXException {
        if(nameflag.equals("name")){
            p.setName(new String(ch,start,length));
        }else if(nameflag.equals("age")){
            p.setAge(new Integer(new String(ch,start,length)));
        }
        
    }
    

}

两种解析方法   业务类：

package com.icss.biz;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

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

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import com.icss.bean.Person;

public class XMLParseBiz {
    InputStream inputstream =null;
    
    public XMLParseBiz(String xmlpath){
        try {
            File f = new File(xmlpath);
            this.inputstream =new FileInputStream(f);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
    /**
     * 通过DOM方法解析XML文件
     * @param inputstream
     * @return
     * @throws ParserConfigurationException 
     * @throws IOException 
     * @throws SAXException 
     */
    public  List<Person> domParseXML( ) throws ParserConfigurationException, SAXException, IOException{
        List<Person> list = new ArrayList<Person>();
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document doc = builder.parse(this.inputstream);
        Element root = doc.getDocumentElement();
        
        NodeList personnodes =root.getElementsByTagName("person");
        for(int i=0;i<personnodes.getLength();i++){
            Element person = (Element)personnodes.item(i);
            Person p = new Person();
            
            p.setId(new Integer(person.getAttribute("id")));
            
            NodeList nodelist =person.getChildNodes();
            for(int j=0;j<nodelist.getLength();j++){
                Node childnode = nodelist.item(j);
                if(childnode.getNodeType()==Node.ELEMENT_NODE && childnode.getNodeName().equals("name")){
                    p.setName(childnode.getFirstChild().getNodeValue());
                }else if(childnode.getNodeType()==Node.ELEMENT_NODE && childnode.getNodeName().equals("age")){
                    p.setAge(new Integer(childnode.getFirstChild().getNodeValue()));
                }
            }
            list.add(p);
        }
        return list;
    }
    
    /**
     * 通过SAX方法解析XML文件
     * @param inputstream
     * @return
     * @throws IOException 
     * @throws SAXException 
     * @throws ParserConfigurationException 
     */
    public List<Person> saxParseXML( ) throws SAXException, IOException, ParserConfigurationException{
        SAXParserFactory factory = SAXParserFactory.newInstance();
        SAXParser parser =factory.newSAXParser();
        
        SaxHelper helper = new SaxHelper();
        parser.parse(this.inputstream, helper);
        
        return helper.getList();
    }
}