InputStream is = new FileInputStream("D://dom4j.xml")
;SAXReader reader = new SAXReader()
;Document doc = reader.read(is);doc.normalize()
;Node node = doc.selectSingleNode("/datas/*")
;//查找datas下的第一个子结点的内空node.getParent().remove(node)
;OutputFormat outformat = OutputFormat.createPrettyPrint()
;// xml自身的编码outformat.setEncoding(doc.getXMLEncoding())
;outformat.setIndent(true)
;File targetFile = new File("D:/dom4j3.xml")
;// 将xmlStr输出到目标路径，使用xml文件的头文件编码OutputStream out = new FileOutputStream(targetFile)
;XMLWriter writer = new XMLWriter(out, outformat)
;// 是否转义特殊字符，默认true转义，false表示不转义writer.setEscapeText(false)
;writer.write(doc)
;writer.flush();
