dom4j操作xml文件整理

创建xml文档
Document document = DocumentHelper.createDocument();
Element root = document.addElement("rootname");
//格式化xml
StringWriter writer = new StringWriter();OutputFormat format = OutputFormat.createPrettyPrint();format.setEncoding("utf-8");XMLWriter xmlwriter = new XMLWriter(writer, format);xmlwriter.write(document);xmlwriter.flush();
//写入文件
BufferedWriter bw = new BufferedWriter( new FileWriter("d:/sss.xml", true));bw.write(writer.toString);bw.flush();
bw.close();

//读取xml文件SAXReader reader = new SAXReader();File file = new File("d:/text.xml");Document document = reader.read(file);//xml文档
Element root = document.getRootElement();//root节点