java--SAX解析xml

有下面的xml文件，如何解析

<?xml version="1.0" encoding="UTF-8"?>
<bookstore>
    <book id="1">
        <name>王小二的妖孽人生</name>
        <author>乔治马丁</author>
        <year>2014</year>
        <price>89</price>
    </book>
    <book id="2">

        <name>安徒生童话</name><year>2004</year>
        <price>77</price>
        <language>English</language>
    </book>
</bookstore>

首先创建sax相关类

package saxXML;

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

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

import org.xml.sax.SAXException;

import sax3.Book;
import saxXML2.SaxHandler;

public class SaxTest {

    public static void main(String[] args) {

        SAXParserFactory factory = SAXParserFactory.newInstance();
        try {
            SAXParser parser = factory.newSAXParser();

            SaxHandler handler = new SaxHandler();

            parser.parse("booKs.xml", handler);

            ArrayList<Book> arrayList=handler.getArrayList();
            System.out.println("数组的大小"+arrayList.size());
            for (Book book : arrayList) {
                System.out.println("图书序列"+book.getId());
                System.out.println("["+book.getName()+"]");
                System.out.println("作者"+book.getAuthor());
                System.out.println("价格"+book.getPrice());
                System.out.println("年份"+book.getYear());
            }







        } catch (ParserConfigurationException | SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}

实现DefaultHandler 类

package saxXML2;

import java.util.ArrayList;

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

import sax3.Book;

public class SaxHandler extends DefaultHandler {
      String valueString="";
      Book book=null;
      ArrayList<Book> bookList=new ArrayList<Book>();
      public ArrayList<Book> getArrayList() {
        return bookList;
    }

@Override
public void startDocument() throws SAXException {
    // TODO Auto-generated method stub
    super.startDocument();
    System.out.println("startDocument");
}
@Override
    public void endDocument() throws SAXException {
        // TODO Auto-generated method stub
        super.endDocument( );
        System.out.println("endDocument");
    }
    @Override
        public void startElement(String uri, String localName, String qName,
                Attributes attributes) throws SAXException {
            // TODO Auto-generated method stub
            super.startElement(uri, localName, qName, attributes);
            if (qName.equals("book")) {//对于book节点
                book=new Book();
              for (int i = 0; i < attributes.getLength(); i++) {
                System.out.print(attributes.getQName(i)+ "   ");
                System.out.println(attributes.getValue(i));
                if (attributes.getQName(i).equals("id")) {
                    book.setId(attributes.getValue(i));//这里属性值就是id
                }
            }
            }                           //对于其他节点，滤掉--
            if (!qName.equals("book")&&!qName.equals("bookstore")) {
                System.out.print("（qName）"+qName);
            }
        }
    @Override
        public void endElement(String uri, String localName, String qName)
                throws SAXException {
            // TODO Auto-generated method stub
            super.endElement(uri, localName, qName);
            //找那两本书的book的结束标记
            if (qName.equals("book")) {

                System.out.println();
                System.out.print("=====遍历一本书结束");
                bookList.add(book);
                book=null;
            }
            else if (qName.equals("name")) {
               book.setName(valueString);
            }
            else if(qName.equals("price")) {
                book.setPrice(valueString);
            }
            else if (qName.equals("author")) {
                book.setAuthor(valueString);
            }
            else if (qName.equals("lanuage")) {
                 book.setAuthor(valueString);
            }
            else if (qName.equals("year")) {
                book.setYear(valueString);
            }       
        }
   @Override
    public void characters(char[] ch, int start, int length)
            throws SAXException {
        // TODO Auto-generated method stub
        super.characters(ch, start, length);
       valueString=new String(ch,start,length) ;
       if (!valueString.trim().equals("")) {
        System.out.println("（charactors）"+valueString);
      }  
   }
}

书籍类用于存放xml里面对象

package sax3;



public class Book {
 private String id;
 private String name;
 private String author;
 private String year;
 private String price;
 private String lanuage;
public String getId() {
    return id;
}
public void setId(String string) {
    this.id = string;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getAuthor() {
    return author;
}
public void setAuthor(String author) {
    this.author = author;
}
public String getYear() {
    return year;
}
public void setYear(String year) {
    this.year = year;
}
public String getPrice() {
    return price;
}
public void setPrice(String price) {
    this.price = price;
}
public String getLanuage() {
    return lanuage;
}
public void setLanuage(String lanuage) {
    this.lanuage = lanuage;
}


}