Spring控制器@ResponseBody不返回预期值

Question

我有一个Spring控制器类，它返回带有@ResponseBody的JSON。但奇怪的是，它返回双字段的整数。我使用JacksonMapper作为JSON库。这是课程。

Phone
public class Phone implements Serializable {

    @JsonProperty(value="phoneid")
    private long phoneId;

    private Plan plan;
    private String sim;
    private String imei;

    @JsonProperty(value="phonetype")
    private String phoneType;

    @JsonProperty(value="phonenumber")
    private String phoneNumber;
    private String label;
    @JsonProperty(value="connecteddate")
    private String connectedDate;
        //getters and setters
} 

Plan
public class Plan implements Serializable {
        @JsonProperty(value="planid")
    private long planId;

    @JsonProperty(value="planname")
    private String planName;

    private double billingIncrement;

    private double owiStdUnitCost;

    private double owiFlagFall;

    private double stdCap;

    private double dataCap;

    private double smsCap;

    private double owiDataUnitCost;

    private double owiSms;
        //getters and setters
}

PhoneResult
public class PhoneResult implements Serializable {
private boolean ok;
    private String message;
    private Phone result;

//getters and setters
}

当我返回PhoneResult对象时，它会返回如下：

{
   "ok": true,
   "message": "",
   "result":
   {
       "phoneid": 600003,
       "phonenumber": "12343423",
       "phonetype": "Samsung Galaxy S2",
       "imei": "343242",
       "sim": "1234324",
       "label": "Mr Bean",
       "connecteddate": "2012-09-19 00:00:00.0",
       "plan":
       {
           "planid": 34,
           "planname": "$59 Jeenee Plan",
           "billingIncrement": 30,
           "owiStdUnitCost": 81.8181818181818,
           "owiFlagFall": 0,
           "stdCap": 636.3636,
           "dataCap": 227.2665,
           "smsCap": 1363.638,
           "owiDataUnitCost": 0.022194,
           "owiSms": 22.7272727272727
       }
   }
}

billingIncrement和owiFlagFall具有整数类型，即使这些字段在类和数据库中是双精度类型。我不想关心这个，但是当我使用Spring resttemplate将return JSON转换为object时，我会导致错误。如果这些字段具有30.0和0.0等双重类型，则不会导致任何错误。这看起来很奇怪，但确实如此。 你能给我任何建议吗？您的回答将不胜感激。