背景：

类拷贝或属性拷贝，采用BeanUtil会用反射，性能不佳

BeanUtil.copyProperties(eventsInputDto, satisfyRiskDTO)

常见转换场景：

1、通过字段的值，条件判断赋值

三目运算判断赋值：

expression = "java(saveInfo.getXxxFlag() == null ? 0 : saveInfo.getXxxFlag())", target = "xxxFlagFlag"

@Mapping(expression = "java(saveInfo.getXxxFlag() == null ? 0 : saveInfo.getXxxFlag())", target = "xxxFlagFlag")
RespDTO toCareActivityApprovalDTO(saveInfo saveInfo);

 其他场景使用场景：

	//不同字段映射@Mapping(target = "memberNo", source = "memberVo.memberNoXxx")//来自其他参数赋值(多个参数实体，赋值到同一对象)@Mapping(target = "authMode", source = "wayEnum.code")//调用外部方法赋值@Mapping(target = "authUid", expression = "java(com.petrochina.gsms.membersync.batch.common.utils.MemberConverUtils.findAuid(memberVo,wayEnum))")//java自带的系统类@Mapping(target = "accountStartTime", expression = "java(java.time.LocalDateTime.now())")//日期转换@Mapping(target = "accountEndTime", expression = "java(cn.hutool.core.date.LocalDateTimeUtil.parse(\"9999-12-12 00:00:00\", cn.hutool.core.date.DatePattern.NORM_DATETIME_FORMATTER))")PersAccountEntity toEntity(MemberVo memberVo, IndividualAcctCertificationWayEnum wayEnum);