Serialize a Long as a String

　　今天在写接口的时候，用postman测试，返回数据与数据库一一对应，但是给前端返回的结果，除了主键id以外，其他都一样，如下

postman：

{
                "unitPrice": null,
                "shoppingId": 898341460864172032,
                "userId": 255,
                "leadTime": null,
                "buyNumber": 2,
                "materialId": 106000001,
                "materialCode": "0106000001",
                "materialName": "油墨",
                "brandId": 456,
                "brandCode": "000246",
                "brandName": "得力",
                "materialPropertyFixed": "7521||40ml||号码机专用",
                "unitId": 55,
                "unitCode": "dascm055",
                "unitName": "瓶",
                "packageUnitId": null,
                "packageUnitCode": null,
                "packageUnitName": null,
                "packageNumber": null,
                "materialSetId": 10602010001,
                "materialSetCode": "010602010001",
                "materialSetName": "油墨",
                "materialPhoteFile": "/dms/image/010602010001/XL_001.jpg",
                "memo": null
            }

前端结果：

{
                "unitPrice": null,
                "shoppingId": 898341460864172000,
                "userId": 255,
                "leadTime": null,
                "buyNumber": 2,
                "materialId": 106000001,
                "materialCode": "0106000001",
                "materialName": "油墨",
                "brandId": 456,
                "brandCode": "000246",
                "brandName": "得力",
                "materialPropertyFixed": "7521||40ml||号码机专用",
                "unitId": 55,
                "unitCode": "dascm055",
                "unitName": "瓶",
                "packageUnitId": null,
                "packageUnitCode": null,
                "packageUnitName": null,
                "packageNumber": null,
                "materialSetId": 10602010001,
                "materialSetCode": "010602010001",
                "materialSetName": "油墨",
                "materialPhoteFile": "/dms/image/010602010001/XL_001.jpg",
                "memo": null
            }

　　

　　postman的shoppingId是  898341460864172032，前端的shoppingId是898341460864172000。

　　解决方案是：

    @JsonSerialize(using = ToStringSerializer.class)
    private Long shoppingId;

serialize a long as a string: