[Java] Dom4j 產生xml格式

Document document = DocumentHelper.createDocument();
Element root = document.addElement("action");
root.addElement("AAA").addText("abc");
root.addElement("BBB").addText("def");
xmlRequest = document.asXML();

若要在ccc下面在加一個node
Element ccc = root.addElement("ccc");
ccc.addElement("ddd").addText("xyz");

xmlRequest輸出為以下字串
<action>
<AAA>abc<AAA>
<BBB>def<BBB>
<ccc>
  <ddd>xyz</ddd>
</ccc>
</action>