1.1版本现象：乱序

 {
            "userId": 27,
            "attribute": "{\"at\":32,\"cr\":20,\"ar\":14,\"hu\":16,\"do\":20,\"li\":1941,\"po\":11,\"sh\":18,\"sp\":118}"
        }

1.2版本以后现象：默认按字母排序

  {
            "userId": 27,
            "attribute": "{\"ar\":14,\"at\":32,\"cr\":20,\"do\":20,\"hu\":16,\"li\":1941,\"po\":11,\"sh\":18,\"sp\":118}"
        }

自定义后：在序列化实体类中手动指定顺序

@JSONType(orders={"at","cr","do","sp","ar","po","sh","hu","li"})
public class Attribute implements Serializable {}

 {
            "userId": 36,
            "attribute": "{\"at\":27,\"cr\":18,\"do\":19,\"sp\":117,\"ar\":13,\"po\":18,\"sh\":5,\"hu\":20,\"li\":1953}"
        },