code: public static String getNodeAttrText(Node node, String attrName) {
          Node fieldNode = node.selectSingleNode(attrName);
          return XmlNodeHelper.getNodeText(fieldNode);
      }
docs: 获取节点文本.
  @param node dom4j节点
  @param attrName 节点属性
  @return 返回节点文本值