我有这样的json：

{
    "Cell No": "",
    "Landline No": "",
    "FFCD": "243594",
    "Utility Code": "NSCH00000000022820",
    "Email ID": "",
    "Change Reason": "AC1-Default Ack Reason",
    "Category Code": "GH99"
}

我想使用gson将上面的json转换成下面的pojo。

class SponsorMandate{
    private String cellNo;
    private String landlineNo;
    private String ffcd;
    private String utilityCode;
    private String emailId;
    private String changeReason;
    private String categoryCode;
}

我的以下代码不起作用：

Gson gson = new Gson();
String jsonElement = gson.toJson(rowData);
System.out.println("print json" + jsonElement);

SponsorMandate sponsorMandateFileRow =
        gson.fromJson(jsonElement,SponsorMandate.class);