用javabean封装xml文档数据 - JAVA

//book.xml

//Books.java

package com.huowolf.handler;

public class Books {
	private String name;
	private String author;
	private int year;
	private double price;
	
	public void setName(String name) {
		this.name = name;
	}
	public void setAuthor(String author) {
		this.author = author;
	}
	public void setYear(int year) {
		this.year = year;
	}
	public void setPrice(double price) {
		this.price = price;
	}
	
	public String getName() {
		return name;
	}
	public String getAuthor() {
		return author;
	}
	public int getYear() {
		return year;
	}
	public double getPrice() {
		return price;
	}
	
	
}

//Demo.java

package com.huowolf.handler;

/*
 * 用javabean封装xml文档数据
 */
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.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

public class Demo3 {

	public static void main(String[] args) throws Exception {
		//获取一个解析工厂
		SAXParserFactory factory = SAXParserFactory.newInstance();
		
		//通过factory获取解析器
		SAXParser parser = factory.newSAXParser();
		
		//得到读取器
		XMLReader reader = parser.getXMLReader();
		
		//设置内容处理器
		BeanListHandler handler = new BeanListHandler();
		reader.setContentHandler(handler);
		
		//读取xml文档内容
		reader.parse("books.xml");
		
		List
  
    list = handler.getBooks();
		System.out.println(list);
		
		System.out.println(list.get(0).getAuthor());

	}
}


//把xml文档中的每一本书封装到一个book对象，并把多个book对象放在一个list集合中返回

class BeanListHandler extends DefaultHandler {
	private List
   
     list= new ArrayList
    
     (); private String currentTag; private Books book; @Override public void startDocument() throws SAXException { System.out.println("开始解析"); } @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { currentTag = qName; if(currentTag.equals("book")) { book = new Books(); } } @Override public void characters(char[] ch, int start, int length) throws SAXException { if("name".equals(currentTag)) { String name = new String(ch, start, length); book.setName(name); } if("author".equals(currentTag)) { String author = new String(ch, start, length); book.setAuthor(author); } if("year".equals(currentTag)) { int year = Integer.parseInt(new String(ch, start, length)); book.setYear(year); } if("price".equals(currentTag)) { double price = Double.parseDouble(new String(ch, start, length)); book.setPrice(price); } } @Override public void endElement(String uri, String localName, String qName) throws SAXException { //System.out.println(qName); if(qName.equals("book")) { list.add(book); book = null; } currentTag = null; } //返回list集合 public List
     
       getBooks() { return list; } }

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