dom4j 的使用

（一）准备的包

dom4j-1.6.1.jar

（二）读取配置文件的关键代码如下

    private synchronized static void loadUiMap() {
        try {
            String path = XmlUtil.class.getClassLoader().getResource("").toURI()
                    .getPath()
                    + orderXmlName;
            File file = new File(path);
            SAXReader saxReader = new SAXReader();
            Document document = saxReader.read(file);
            Element root1 = document.getRootElement();
            Element root = root1.element("ui");
            CLIPBOARD_START_TIME = root.elementText("CLIPBOARD_START_TIME");

（三）写配置文件的关键代码如下：

    String toConfigText = jTextArea.getText();
                        // 先保存起来
                        try {
                            Document document = DocumentHelper
                                    .parseText(toConfigText);
                            XMLWriter writer = new XMLWriter(
                                    new FileOutputStream(path));
                            writer.write(document);
                            writer.close();

（四）一个修改版本号将版本号加一的代码

// 将xml客户端文件的版本号加0.1
    public synchronized void alertClentXmlVersion() {
        try {
            String path = getClass().getClassLoader().getResource("").toURI().getPath()
                    + XmlUtil.orderXmlName;
            File file = new File(path);
            SAXReader saxReader = new SAXReader();
            Document document = saxReader.read(file);
            Element root = document.getRootElement();
            Element element = root.element("clent");
            Element element2 = element.element("CLENTVERSION");
            float version = Float.parseFloat(element2.getTextTrim()) + 0.1F;
            DecimalFormat fnum = new DecimalFormat("##0.0");
            String versionStr = fnum.format(version);
            element2.setText(versionStr);
            XMLWriter writer = new XMLWriter(new FileOutputStream(path));
            writer.write(document);
            writer.close();
        } catch (Exception e) {
            log.info(e);
        }
    }