java dom4j中生成xml文件

首先要下载对应的jar包，其中dom4j.jar,jaxen.jar

如创建例子

:Document document =? DocumentHelper.createDocument();
?Element root = document.addElement("tree");?
??? root .addAttribute("id", "0");
???
??? root.addComment("this is a newspaper xml");?? //注释文件
??? root.addProcessingInstruction("MsgHeader", "text");?

??
??? Element item=root.addElement("item");
??? item.addAttribute("text", "工作台");
??? item.addAttribute("id", "1");
???
??? Element subelement=item.addElement("item");
??? subelement.addAttribute("text", "代办事项");
??? subelement.addAttribute("id", "2");
???
??? subelement=item.addElement("item");
??? subelement.addAttribute("text", "代办事项2");
??? subelement.addAttribute("id", "3");
???
??? Element litelement=subelement.addElement("item");
??? litelement.addAttribute("text","代办事项2-1" );
??? litelement.addAttribute("id", "301");
???
???
??? String content=document.asXML();
??? System.out.println(content);