DOM4J生成XML文档

public int createXMLFile(String filename) {
  int returnValue = 0;
  Document document = DocumentHelper.createDocument();    //生成Document，用于管理XML文档
  
  Element booksElement = document.addElement("books");    //添加根节点
  
  booksElement.addComment("This is a test for dom4j, holen, 2004.9.11");   //添加注释
  
  Element bookElement = booksElement.addElement("book");      //在跟节点books下添加一个book子节点
  
  bookElement.addAttribute("show", "yes");    //为bookElement添加属性，并制定属性的值
  
  Element titleElement = bookElement.addElement("title");   //为bookElement节点添加一个title子节点
  
  titleElement.setText("Dom4j Tutorials");      //为title子节点设置文本节点内容
  
  try {
   XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)));
   
   writer.write(document);  //普通格式，比较不美观
      
      OutputFormat format =null;
       
     
//      format=OutputFormat.createPrettyPrint();       //美化格式,读取后美化显示     
//   writer = new XMLWriter( System.out, format );   
//   writer.write( document );
   
//   format = OutputFormat.createCompactFormat();  //缩减格式，读取后缩减显示
//   writer = new XMLWriter( System.out, format );
//   writer.write( document );
   
   
   writer.close();
   
   return