个回答

• JessicaJiang

  2015-01-24 17:52:37

  缩进可以采用tab键，也可以使用xml专门的编辑器；

  添加多个book节点：

  <bookstore>

      <book>...</book>
  

      <book>...</book>
  

      <book>...</book>
  

      ....
  

  </bookstore>

  0

• 脚踏地

  2015-01-27 15:30:29

  //之前之所以添加的book节点会覆盖前面的book节点，是因为变量名都相同，这样的话自然下面的要替换上面的值

  
  

  public static void main(String[] args) {
    new TestXml().createXml();
   }
   
   public void createXml(){
    DocumentBuilder db=getDocumentBuilder();
    Document document=db.newDocument();
    document.setXmlStandalone(true);
    Element books=document.createElement("books");
    document.appendChild(books);
    
  //  添加多个节点
    books.appendChild(getChildNode(document,"1","冰与火之歌","乔治马丁","39"));
    books.appendChild(getChildNode(document,"2","安徒生童话","安徒生","29"));
    
    TransformerFactory tff=TransformerFactory.newInstance();
    
    try {
     Transformer tf=tff.newTransformer();
     tf.setOutputProperty(OutputKeys.INDENT, "yes");

  //设置缩进量
     tf.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
     tf.transform(new DOMSource(document), new StreamResult(new File("lib/books1.xml")));
     
    } catch (TransformerConfigurationException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    } catch (TransformerException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
   
   public DocumentBuilder getDocumentBuilder(){
    DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
    DocumentBuilder db = null;
    try {
     db=dbf.newDocumentBuilder();
    } catch (ParserConfigurationException e) {
     e.printStackTrace();
    }
    return db;
   }
   
   public Element getChildNode(Document doc,String id,String name,String author,String price){
    Element childNode=doc.createElement("book");
    childNode.setAttribute("id", id);
    childNode.appendChild(getChildNodeElement(doc,"name",name));
    childNode.appendChild(getChildNodeElement(doc,"author",author));
    childNode.appendChild(getChildNodeElement(doc,"price",price));
    return childNode;
   }

   public Element getChildNodeElement(Document doc,String name,String text){
    Element element=doc.createElement(name);
    element.setTextContent(text);
    return element;
   }

  4