dom4j读写xml简单demo

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package com.protocol;import java.io.*;import java.util.List;import org.dom4j.*;import org.dom4j.io.*;public class Dom4jDemo {    public void createXml(String fileName) {        DocumentFactory factory = new DocumentFactory();        Document document = factory.createDocument();        Element root = document.addElement("root");        for(Integer i=0; i < 2; ++i)        {            Element book = root.addElement("book");            book.addAttribute("id",i.toString());            book.addAttribute("name","bookname");            Element author = book.addElement("author");            author.setText("dalangge");            Element price = book.addElement("price");            price.setText("15");        }        try {            FileWriter fw = new FileWriter(fileName);            OutputFormat format = new OutputFormat("  ",true,"gb2312");            XMLWriter writer = new XMLWriter(fw,format);            writer.write(document);            fw.close();        } catch (IOException e) {            e.printStackTrace();        }    }    public void parserXml(String fileName) {        try {            File f = new File(fileName);            InputStream in = new FileInputStream(f);            SAXReader reader = new SAXReader();            Document doc = reader.read(in);            Element root = doc.getRootElement();            readNode(root);        } catch (DocumentException e) {            e.printStackTrace();        } catch (FileNotFoundException e) {            e.printStackTrace();        }    }    @SuppressWarnings("unchecked")    public void readNode(Element root) {        if (root == null) return;        System.out.println(root.getName()+":"+(String)root.getData());        // 获取属性        List<Attribute> attrs = root.attributes();        if (attrs != null && attrs.size() > 0) {            for (Attribute attr : attrs) {                System.out.println(attr.getName() + ": " + attr.getValue());            }        }        // 获取他的子节点        List<Element> childNodes = root.elements();        for (Element e : childNodes) {            readNode(e);        }    }}
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