public static String getParameter(String name) {
		String xpath = "/webapp-configs/param[@name='" + name + "']/@value";
		Node node = instance.configDocument.selectSingleNode(xpath);
		if (node == null) {
			instance.logger.error("配置参数[" + name + "]不存在");
			return "";
		}
		return node.getText();
	}