XStream使用起来非常简单，不需要预先生成相关的辅助类，不需要映射文件。当然，使用简单也注定了它只能处理简单结构的 XML 文件。-XStream is a simple library to serialize objects to XML and back again. If using the enhanced mode, XStream can re-instantiate classes that do not have a default constructor. Howev