利用dom4j读写XML

public static  HashMap<String, String> ReadConfig() {  
        HashMap<String, String> map=new HashMap<>();
        try {
            SAXReader reader = new SAXReader();  
            Document document= reader.read(new File("config.xml"));
            Element node = document.getRootElement();
             @SuppressWarnings("unchecked")
            List<Element> listElement = node.elements();
            for (final Element e : listElement) {
                map.put(e.getName(), e.getText());
            } 
        } catch (Exception e) {
            e.printStackTrace();
            logger.info("读取配置文件错误"+e.getMessage());
        }  
        return map;
    }
    
    public static void WriterConfig(HashMap<String, String> map) {  
        try {
            SAXReader reader = new SAXReader();  
            Document document= reader.read(new File("config.xml"));
            Element node = document.getRootElement(); 
            for (Entry<String, String> entry : map.entrySet()) {
                node.addElement(entry.getKey()).setText(entry.getValue());
            }
            OutputFormat format = OutputFormat.createPrettyPrint();  
            format.setEncoding("UTF-8");  
            XMLWriter writer = new XMLWriter(new OutputStreamWriter(new FileOutputStream(new File("config.xml")), "UTF-8"), format);
            writer.write(document);  
            writer.flush();  
            writer.close();  
        } catch (Exception e) {
            logger.info("写入配置文件出错"+e.getMessage());
            e.printStackTrace();
        } 
    }