mybatis重复查询导致内存地址相同bug

bug记录

        DeathMedicalProve deathMedicalProve = deathMedicalProveMapper.selectById(dMPCA.getReda());
                    //新增签照
                    DeathMedicalProve prove = iDeathMedicalProveService.selectById(dMPCA.getReda());
                    prove.setId(null);
                    prove.setOldDeathBh(prove.getBh());
                    prove.setBh(null);
                    prove.setQfjgmc(null);
                    prove.setQfjgdm(null);
                    prove.setCreateTime(new Date());
                    prove.setJmswyxzmzjzt(CertificateStatusEnum.EFFECTIVE.getType());
                    prove.setQflx(MedicalIssueTypeEnum.FIRST_ISSUANCE.getType());
                    prove.setAuditStatus(MedicalIssueStatusEnum.ISSUING.getType());
                    prove.setDeleteRemark(null);
                    prove.setRemake(null);
                    prove.setPrintCount(0);
                    prove.setPrintDate(null);
                    prove.setDataTrans(null);
                    deathMedicalProveMapper.insert(prove);

为什么会导致deathMedicalProveid被重新赋值

都是指向的同一个内存地址导致后续修改一致

解决方法：

org.springframework.beans.BeanUtils.copyProperties(originalProve, newProve);