@Override
    public String toMessage() {
       return "<xml><return_code><![CDATA[" + code + "]]></return_code><return_msg><![CDATA[" + content
                + "]]></return_msg></xml>";
    }
@author egan
<pre>
    email egzosn@gmail.com
    date 2016-6-1 13:53:3
 </pre>
pay-java-common/src/main/java/com/egzosn/pay/common/bean/outbuilder/PayXmlOutMessage.java