BeanUtils.copyProperties无法拷贝问题

说明

项目中我们经常会调用第三方接口，对于第三方的返回数据DTO 需要使用到原型模式 转换为前端所需要的VO，对于数据结构不变化的我们经常使用的 BeanUtils.copyProperties来实现转换。

问题： ADto 中包含BDto 拷贝数据给 AVo 中包含BVo 会出现BDto无法拷贝 BVo现象

• 调用第三方数据结构Json对象

{
    "success": true,
    "result": {
        "totalExp": 337,
        "pagingData": {
            "total": 170,
            "data": [
                {
                    "tenantId": null,
                    "extra": null,
                    "exp": 1,
                    "groupName": "其他",
                    "groupCode": "OTHER",
                    "eventCode": "SIGN_IN登录标识",
                    "eventName": "每日登入",
                    "type": "INCREASE",
                    "value": "",
                    "createTime": 1611020815000
                },
                {
                    "tenantId": null,
                    "extra": null,
                    "exp": 1,
                    "groupName": "其他",
                    "groupCode": "OTHER",
                    "eventCode": "SIGN_IN登录标识",
                    "eventName": "每日登入",
                    "type": "INCREASE",
                    "value": "",
                    "createTime": 1610009109000
                },
            ],
            "empty": false
        }
    }
}

• 接收实体Dto定义

@Data
public class ExpDetailRespDto {
    private Integer totalExp;
    private ExpPageDataRespDto  pagingData;
    private Boolean empty;
}

@Data
public class ExpPageDataRespDto {
    private Integer  total;
    private List<ExpDetailDto> data;
}

@Data
public class ExpDetailDto {
    private Integer exp;
    private String groupName;
    private String groupCode;
    private String eventCode;
    private String eventName;
    private String type;
    private String value;
    @JsonFormat(pattern = "yyyy.MM.dd",timezone = "GMT+8")
    private Date createTime;
    private String tenantId;
    private String extra;
}

@Data
//@JsonIgnoreProperties({"hibernateLazyInitializer","handler"})
public class ExpDetailResp {

    @ApiModelProperty(value = "总exp值")
    private Integer totalExp;

    @ApiModelProperty(value = "分页内容")
    private ExpPageDataResp  pagingData;

}

@Data
public class ExpPageDataResp {

    @ApiModelProperty(value = "总数")
    private Integer  total;

    @ApiModelProperty(value = "详细列表")
    private List<ExpDetailVo> data;
}

@Data
public class ExpDetailVo {

    @ApiModelProperty(value = "exp值")
    private Integer exp;

    @ApiModelProperty(value = "分组名称")
    private String groupName;

    @ApiModelProperty(value = "分组code")
    private String groupCode;

    @ApiModelProperty(value = "事件code")
    private String eventCode;

    @ApiModelProperty(value = "事件名称")
    private String eventName;

    @ApiModelProperty(value = "所属类型")
    private String type;

    @ApiModelProperty(value = "事件值")
    private String value;

    @ApiModelProperty(value = "创建时间")
    private Date createTime;
}

原因： BeanUtils.copyProperties 是通过类型和 名称 进行拷贝查找的，当BDto 与 BVo数据类型不一致时候是无法拷贝的。