获取传输回来的xml转换出现问题

 in = conn.getInputStream();
            Document document=(Document) new SAXBuilder().build(in);
            这里出现 jdom 转dom4j 报错
            org.jdom.Document cannot be cast to org.dom4j.Document

 org.jdom.Document respJdom =  (org.jdom.Document) new SAXBuilder().build(in);
            DOMOutputter outputter = new DOMOutputter();
            org.w3c.dom.Document respW3c=outputter.output(respJdom);
            org.dom4j.io.DOMReader xmlReader=new org.dom4j.io.DOMReader(); 
            Document resp= xmlReader.read(respW3c);