使用dom4j读写XML

    /**
     * 获取Dom4j的Document对象, 默认字符集UTF-8
     * @param data
     * @return
     * @throws ParseException
     */
    public static Document getDocument(String data) throws ParseException{

        return getDocument(data, "UTF-8");

    }

    /**
     * 获取Dom4j的Document对象
      * @param data
     * @param charset
     * @return
     */
    public static Document getDocument(String data, String charset) throws ParseException{

        SAXReader reader = new SAXReader();
        Document document = null;
        InputStreamReader utfreader = null;
        InputStream in = null;

        try {
            in = new ByteArrayInputStream(data.getBytes());
            utfreader = new InputStreamReader(in, charset);
            document = reader.read(utfreader);
        }
        catch (DocumentException e) {
            throw new ParseException(e.getMessage(), e);
        } 
        catch(UnsupportedEncodingException e){
            throw new ParseException(e.getMessage(), e);
        } 
        finally {
            try {
                in.close();
            }
            catch (IOException e) {
            }
        }
        return document;  
    }

        /**
         * 将XML数据流备份成文件
          * @param data
         * @param saveFilePath
         * @param saveFileName
         * @return
         */
        public boolean saveFile(String data, String saveFilePath, String saveFileName){

            File file = new File(saveFilePath);
            if(!file.exists()){
                file.mkdirs();
            }

            String filePath = saveFilePath + File.separator + saveFileName;

            boolean success = false;

            Writer writer = null;
            XMLWriter xmlWriter = null;
            SAXReader reader = new SAXReader();
            Document document = null;
            InputStreamReader utfreader = null;
            InputStream in = null;        

            try {
                in = new ByteArrayInputStream(data.getBytes());
                utfreader = new InputStreamReader(in, "UTF-8");
                document = reader.read(utfreader);

                writer = new OutputStreamWriter(new FileOutputStream(filePath), "UTF-8");
                OutputFormat format = OutputFormat.createPrettyPrint();
                format.setEncoding("UTF-8");
                xmlWriter = new XMLWriter(writer, format);
                xmlWriter.write(document);
                xmlWriter.flush();
                success = true;
            }
            catch (UnsupportedEncodingException e) {
                e.printStackTrace();
                log.error(e);
            }
            catch (FileNotFoundException e) {
                e.printStackTrace();
                log.error(e);
            }
            catch (DocumentException e) {
                e.printStackTrace();
                log.error(e);
            }
            catch (IOException e) {
                e.printStackTrace();
                log.error(e);
            }
            finally{
                try {
                    utfreader.close();
                    writer.close();
                }catch (IOException e) {}
            }
            return success;
        }