BO、VO层应用实例

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BO、VO层应用实例

BO（Business Object）层是一种用于处理业务逻辑的组件层。BO层主要负责封装和处理与业务相关的逻辑和数据操作，它通常位于应用程序的中间层，处于数据访问层（DAO层）和表示层（UI层）之间

需求分析：前端传递的时间类型为String类型，而我需要编写自定义sql进行联表查询，需要对时间类型进行转换为Timestamp类型和数据库匹配

• Controller

    @GetMapping("list")
    @ApiOperation("拒付查询")
    public Result<PageResult<ResChargebackList>> list(ChargebackListQuery query) {
        return Result.succ(chargebackService.list(query));
    }

• ChargebackListQuery（VO：request）：接收前端参数并在不同层之间传递数据（前端请求参数）

@Data
public class ChargebackListQuery extends PageQuery {

    @ApiModelProperty("XXX")
    private String merchantNo;
    @ApiModelProperty("XXX")
    private String uniqueId;
    @ApiModelProperty("XXX")
    private String transactionId;
    @ApiModelProperty("XXX")
    private String transactionCardBrand;
    @ApiModelProperty("XXX")
    private Integer chargebackType;
    @ApiModelProperty("XXX")
    private String chargebackArn;
    @ApiModelProperty("XXX")
    private Integer warnFromState;
    @ApiModelProperty("XXX")
    private String channelName;
    @ApiModelProperty("交易开始时间")
    private String transactionAtStartTime;
    @ApiModelProperty("交易结束时间")
    private String transactionAtEndTime;
    @ApiModelProperty("拒付开始时间")
    private String chargeBackAtStartTime;
    @ApiModelProperty("拒付结束时间")
    private String chargeBackAtEndTime;
    @ApiModelProperty("导入开始时间")
    private String createAtStartTime;
    @ApiModelProperty("导入结束时间")
    private String createAtEndTime;
    @ApiModelProperty("XXX")
    private Integer settleStatus;

}

• ResChargebackList（VO：response）：接收前端参数并在不同层之间传递数据（后端响应参数）

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class ResChargebackList {

    protected Long id;
    @ApiModelProperty("XXX")
    protected String merchantNo;
    @ApiModelProperty("XXX")
    private Date transactionAt;
    @ApiModelProperty("XXX")
    protected String uniqueId;
    @ApiModelProperty("XXX")
    private String transactionCardBrand;
    @ApiModelProperty("XXX")
    private String transactionAmount;
    @ApiModelProperty("XXX")
    protected Date chargebackAt;
    @ApiModelProperty("XXX")
    protected String chargebackAmount;
    @ApiModelProperty("XXX")
    protected String chargebackCode;
    @ApiModelProperty("XXX")
    protected Integer chargebackType;
    @ApiModelProperty("XXX")
    protected String chargebackTypeValue;
    @ApiModelProperty("XXX")
    protected String chargebackArn;
    @ApiModelProperty("XXX")
    private String warnFromState;
    @ApiModelProperty("XXX")
    protected String channelRemark;
    @ApiModelProperty("XXX")
    protected String channelName;
    @ApiModelProperty("XXX")
    protected Date createAt;
    @ApiModelProperty("XXX")
    private String operator;
    @ApiModelProperty("XXX")
    private Integer settleStatus;

}

• Service

public PageResult<ResChargebackList> list(ChargebackListQuery query) {
    // 将ChargebackListQuery对象转换为ChargebackListQueryBO对象
    ChargebackListQueryBO convert = ChargebackListQueryBO.convert(query);
    // 查询交易退款列表
    List<ResChargebackResponse> page = transactionChargebackRepo.queryList(convert);
    // 获取卡品牌列表
    List<SystemCardBrandNmae> cardBrandNameList = systemCardBrandRepo.getCardList();
    // 将查询结果进行转换和处理
    List<ResChargebackList> collect = page.stream().map(bean -> new ResChargebackList(
        bean.getId(),
        bean.getMerchantNo(),
        bean.getTransactionAt(),
        bean.getUniqueId(),
        convertChargebackType(cardBrandNameList, bean.getTransactionCardBrand()),
        Amount.getInstance(bean.getTransactionCurrency(), bean.getTransactionAmount()).show(),
        bean.getChargebackAt(),
        Amount.getInstance(bean.getChargebackCurrency(), bean.getChargebackAmount()).show(),
        bean.getChargebackCode(),
        bean.getChargebackType(), 
        ChargebackType.typeOf(bean.getChargebackType()).name,
        bean.getChargebackArn(),
        bean.getWarnFrom() == null ? EWarnFromStatus.NO.getValue() : EWarnFromStatus.YES.getValue(),
        bean.getChargebackRemark(),
        ManageTools.showChannel(bean.getCompanyCode(), bean.getChannelName()),
        bean.getCreateAt(),
        bean.getOperator(),
        bean.getSettleStatus()
    )).collect(Collectors.toList());
    // 构建分页结果对象
    return PageResult
        .<ResChargebackList>builder()
        .pageNo(Integer.parseInt(query.getPageNo()))
        .pageSize(Integer.parseInt(query.getPageSize()))
        .total(transactionChargebackRepo.chargebackCount(convert))
        .items(collect)
        .build();
}

• BO（将前端传递的String时间，进行BO层转换为Timestamp类型，再传递给数据库处理）

@Data
public class ChargebackListQueryBO {

    @ApiModelProperty("XXX")
    private String merchantNo;
    @ApiModelProperty("XXX")
    private String uniqueId;
    @ApiModelProperty("XXX")
    private String transactionId;
    @ApiModelProperty("XXX")
    private String transactionCardBrand;
    @ApiModelProperty("XXX")
    private Integer chargebackType;
    @ApiModelProperty("XXX")
    private String chargebackArn;
    @ApiModelProperty("XXX")
    private Integer warnFromState;
    @ApiModelProperty("XXX")
    private String channelName;
    @ApiModelProperty("交易开始时间")
    private Timestamp transactionAtStartTime;
    @ApiModelProperty("交易结束时间")
    private Timestamp transactionAtEndTime;
    @ApiModelProperty("拒付开始时间")
    private Timestamp chargeBackAtStartTime;
    @ApiModelProperty("拒付结束时间")
    private Timestamp chargeBackAtEndTime;
    @ApiModelProperty("导入开始时间")
    private Timestamp createAtStartTime;
    @ApiModelProperty("导入结束时间")
    private Timestamp createAtEndTime;
    @ApiModelProperty("XXX")
    private Integer settleStatus;

    private Integer offset;
    private Integer limit;

    public void setOffset(String pageNo, String pageSize) {
        this.offset = (Integer.parseInt(pageNo) - 1) * Integer.parseInt(pageSize);
    }

    public void setLimit(String pageSize) {
        this.limit = Integer.parseInt(pageSize);
    }

    public static ChargebackListQueryBO convert(ChargebackListQuery chargebackListQuery) {
        ChargebackListQueryBO chargebackListQueryBO = new ChargebackListQueryBO();
        chargebackListQueryBO.setMerchantNo(chargebackListQuery.getMerchantNo());
        chargebackListQueryBO.setUniqueId(chargebackListQuery.getUniqueId());
        chargebackListQueryBO.setTransactionId(chargebackListQuery.getTransactionId());
        chargebackListQueryBO.setTransactionCardBrand(chargebackListQuery.getTransactionCardBrand());
        chargebackListQueryBO.setChargebackType(chargebackListQuery.getChargebackType());
        chargebackListQueryBO.setChargebackArn(chargebackListQuery.getChargebackArn());
        chargebackListQueryBO.setWarnFromState(chargebackListQuery.getWarnFromState());
        chargebackListQueryBO.setChannelName(chargebackListQuery.getChannelName());

        chargebackListQueryBO.setTransactionAtStartTime(
                chargebackListQuery.getTransactionAtStartTime() == null ? null : 		       Timestamp.valueOf(chargebackListQuery.getTransactionAtStartTime().replace("+", " "))
        );
        chargebackListQueryBO.setTransactionAtEndTime(
                chargebackListQuery.getTransactionAtEndTime() == null ? null : Timestamp.valueOf(chargebackListQuery.getTransactionAtEndTime().replace("+", " "))
        );
        chargebackListQueryBO.setChargeBackAtStartTime(
                chargebackListQuery.getChargeBackAtStartTime() == null ? null : Timestamp.valueOf(chargebackListQuery.getChargeBackAtStartTime().replace("+", " "))
        );
        chargebackListQueryBO.setChargeBackAtEndTime(
                chargebackListQuery.getChargeBackAtEndTime() == null ? null : Timestamp.valueOf(chargebackListQuery.getChargeBackAtEndTime().replace("+", " "))
        );
        chargebackListQueryBO.setCreateAtStartTime(
                chargebackListQuery.getCreateAtStartTime() == null ? null : Timestamp.valueOf(chargebackListQuery.getCreateAtStartTime().replace("+", " "))
        );
        chargebackListQueryBO.setCreateAtEndTime(
                chargebackListQuery.getCreateAtEndTime() == null ? null : Timestamp.valueOf(chargebackListQuery.getCreateAtEndTime().replace("+", " "))
        );
        chargebackListQueryBO.setSettleStatus(chargebackListQuery.getSettleStatus());
        chargebackListQueryBO.setOffset(chargebackListQuery.getPageNo(), chargebackListQuery.getPageSize());
        chargebackListQueryBO.setLimit(chargebackListQuery.getPageSize());

        return chargebackListQueryBO;
    }
}

此案例：DAO/PO/REPO、Impl不做展示，代码太多了~

• DAO：Mapper
• PO：数据库中的实体或表的映射
• REPO、Impl：接口实现类

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