DOM4J生成xml文件

DOM4J生成xml文件主要步骤：

1. 创建document对象，代表整个XML
2. 创建根节点
3. 向跟节点中添加属性
4. 生成子节点及其内容
5. 设置生成xml的格式
6. 生成xml文件

例子：

DOM4JTest {
    private static List NewItemList = new ArrayList();
    private void createXML(){
        //1、创建document对象，代表整个XML
        Document document = DocumentHelper.createDocument();
        //2、创建根节点rss
        Element  rss= document.addElement("rss");
        //3、向rss节点中添加version属性
        rss.addAttribute("version", "2.0");
        //4、生成子节点及其内容
        Element channel = rss.addElement("channel");
        Element title = channel.addElement("title");
        title.setText("");
        Element image = channel.addElement("image");
        Element imageTitle = image.addElement("title");
        imageTitle.setText("");
        Element imageLink = image.addElement("link");
        imageLink.setText("http://politics.people.cn");
        Element imageUrl = image.addElement("url");
        imageUrl.setText("http://www.people.cn/img/2014peoplelogo/rmw_logo.gif");
        Element description = channel.addElement("description");
        description.setText(");
        Element link = channel.addElement("link");
        link.setText("http://politics.people.cn");
        Element language = channel.addElement("language");
        language.setText("zh-cn");
        Element generator = channel.addElement("generator");
        generator.setText("www.people.cn");
        Element copyright = channel.addElement("copyright");
        copyright.setText("");
        Element pubDate = channel.addElement("pubDate");
        pubDate.setText("2016-07-07 22:03:00");
        for (NewItem itemNew : NewItemList) {
            Element item = channel.addElement("item");
            Element itemTitle = item.addElement("title");
            itemTitle.setText(itemNew.getTitle());
            Element itemLink = item.addElement("link");
            itemLink.setText(itemNew.getLink());
            Element itemPubDate = item.addElement("pubDate");
            itemPubDate.setText(itemNew.getPubDate());
            Element itemAuthor = item.addElement("author");
            itemAuthor.setText(itemNew.getAuthor());
            Element itemGuid = item.addElement("guid");
            itemGuid.setText(itemNew.getGuid());
            Element itemDescription = item.addElement("description");
            itemDescription.setText(itemNew.getDescription());
        }
        //5、设置生成xml的格式
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");
        //6、生成xml文件
        File file = new File("rssnews.xml");
        XMLWriter writer;
        try {
            writer = new XMLWriter(new FileOutputStream(file),format);
            //设置是否转义，默认为true，代表 
            writer.setEscapeText(false);
            writer.write(document);
            writer.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    private void createNewsItem() {
        NewItem item = new NewItem();
        item.setTitle("");
        item.setLink("http://politics.people.com.cn/n1/2016/0707/c1001-28534758.html");
        item.setPubDate("2016-07-07");
        item.setAuthor("人民网");
        item.setGuid("http://politics.people.com.cn/n1/2016/0707/c1001-28534758.html");
        item.setDescription("");
        NewItemList.add(item);

        NewItem item2 = new NewItem();
        item2.setTitle("");
        item2.setLink("http://politics.people.com.cn/n1/2016/0707/c1001-28531678.html");
        item2.setPubDate("2016-07-07");
        item2.setAuthor("赵鹏");
        item2.setGuid("http://politics.people.com.cn/n1/2016/0707/c1001-28531678.html");
        item2.setDescription("");
        NewItemList.add(item2);
    }
    public static void main(String[] args) {
        new DOM4JTest().createNewsItem();
        new DOM4JTest().createXML();
    }

ps：需要先创建一个NewItem实体类，其属性有：title、 link、pubDate、author;、guid、description。

生成的XML文件：

<rss version="2.0">
  <channel>
    <title>title>
    <image>
      <title>title>
      <link>http://politics.people.cnlink>
      <url>http://www.people.cn/img/2014peoplelogo/rmw_logo.gifurl>
    image>
    <description>
    http://politics.people.cn
    zh-cn
    www.people.cn
    copyright>
    <pubDate>2016-07-07 22:03:00pubDate>
    <item>
      <title>title>
      <link>http://politics.people.com.cn/n1/2016/0707/c1001-28534758.htmllink>
      <pubDate>2016-07-07pubDate>
      <author>人民网author>
      <guid>http://politics.people.com.cn/n1/2016/0707/c1001-28534758.htmlguid>
      <description>description>
    item>
    <item>
      <title>title>
      <link>http://politics.people.com.cn/n1/2016/0707/c1001-28531678.htmllink>
      <pubDate>2016-07-07pubDate>
      <author>赵鹏author>
      <guid>http://politics.people.com.cn/n1/2016/0707/c1001-28531678.htmlguid>
      <description>description>
    item>
  channel>
rss>