dom4j的xml操作

 1.输出xml文件

Document document = DocumentHelper.createDocument();

//根节点

Element root = document.addElement("rootName");

//子节点

Element element = root.addElement("nodeName");

//子节点属性

element.addAttribute("attributeName","attributeValue");

//设置输出格式

OutputFormat format = OutputFormat.createPrettyPrint();

//写入xml文件

XMLWriter writer = new XMLWriter(new FileWriter(file),format);

writer.write(document);

writer.close();