指定Java 实体字段序列化类型

 使用注解：

 @JsonSerialize(using = ToStringSerializer.class)

@Data
@ApiModel("跟进实体")
public class FollowVo {

    @ApiModelProperty(value = "跟进id")
    @JsonSerialize(using = ToStringSerializer.class)
    private Long id;

    @ApiModelProperty(value = "跟进方式")
    private Long promWay;
}