在Soap服务的响应中获取空值

最后，我在我的应用程序中发现我的错误，即我的请求和响应pojo不正确。
我的回应是这样的

@XmlAccessorType(XmlAccessType.FIELD)@XmlRootElement(name = "CardUpdateResponse",namespace="http://www.corecard.com/Prepaid")public class FVCardUpdateResponse {    @XmlElement(name="CARDUPDATE_RET", namespace="http://www.corecard.com/Prepaid")    private CARDUPDATE_RET response;    //Getters and setters    public static class CARDUPDATE_RET{        @XmlElement(name = "ACCOUNTNUMBER", namespace="http://www.corecard.com/Prepaid")        private String AccountNumber;        @XmlElement(name = "ResCode", namespace="http://www.corecard.com/Prepaid")        private String ResCode;        @XmlElement(name = "ResErrorCode", namespace="http://www.corecard.com/Prepaid")        private String ResErrorCode;        @XmlElement(name = "ResErrorMsg", namespace="http://www.corecard.com/Prepaid")        private String ResErrorMsg;        //Getters and Setters    }}