java 解析 soap xml 获取 节点 值 解析 json

String aa = "<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd="http://www.w3.org/2001/XMLSchema\">soap:Body<DoCallResponse xmlns="http://tempuri.org/\"><DoCallResult>{\"IsSuccess\":true,\"JsonStr\":\"{\ "SerNo\ ":\ "50439513\ ",\ "ModelId\ ":\ "1\ ",\ "BtnState\ ":\ "Call\ ",\ "RoomId\ ":\ "124\ ",\ "DoctorId\ ":\ "2007213\ "}","Msg":"呼叫成功！"}</soap:Body></soap:Envelope>";
org.dom4j.D