DOM4j深度解析：高效处理XML文件

import java.io.File;   
import java.io.FileWriter;   
import java.util.Iterator;   
import java.util.List;   
  
import org.dom4j.Attribute;   
import org.dom4j.Document;   
import org.dom4j.DocumentHelper;   
import org.dom4j.Element;   
import org.dom4j.io.OutputFormat;   
import org.dom4j.io.SAXReader;   
import org.dom4j.io.XMLWriter;   
  
public class Createxml {   
  
    /**  
     * 主要是用来创建XML文档并排版  
     */  
    public Createxml() {   
    }   
  
    public int createXMLFile(String filename) {   
        /** 返回操作结果,0 表失败,1 表成功 */  
        int returnValue = 0;   
        /** 建立document对象 */  
        Document document = DocumentHelper.createDocument();   
        /** 建立XML文档的根books */  
        Element booksElement = document.addElement("books");   
        /** 加入一行注释 */  
        booksElement.addComment("This is a test for dom4j");   

        /** 加入第一个book节点 */  
        Element bookElement = booksElement.addElement("book");   
        /** 加入show属性内容 */  
        bookElement.addAttribute("show", "yes");   
        /** 加入title节点 */  
        Element titleElement = bookElement.addElement("title");   
        /** 为title设置内容 */  
        titleElement.setText("Dom4j Tutorials");   
  
        /** 类似的完成后两个book */  
  
        bookElement = booksElement.addElement("book");   
        bookElement.addAttribute("show", "yes");   
        titleElement = bookElement.addElement("title");   
        titleElement.setText("Lucene Studing");   
        bookElement = booksElement.addElement("book");   
        bookElement.addAttribute("show", "no");   
        titleElement = bookElement.addElement("title");   
        titleElement.setText("Lucene in Action");   
  
        /** 加入owner节点 */  
  
        Element ownerElement = booksElement.addElement("owner");   
        ownerElement.setText("O'Reilly");   
  
        try {   
            /** 将document中的内容写入文件中 */  
            XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)));   
            writer.write(document);   
            writer.close();