mybatis or查询

public  List<EtStuWarning> getList( EtStuWarning o){


        LambdaQueryWrapper<EtStuWarning> lambdaQueryWrapper = Wrappers.lambdaQuery();

        if (Objects.nonNull(o.getStuname()) && o.getStuname().trim().length()>0 ) {
            lambdaQueryWrapper.like(EtStuWarning ::getStuname, o.getStuname());
        }
        if (Objects.nonNull(o.getStuno()) && o.getStuno().trim().length()>0 ) {
            lambdaQueryWrapper.like(EtStuWarning ::getStuno, o.getStuno());
        }

        if (Objects.nonNull(o.getMajor()) && o.getMajor().trim().length()>0 ) {
            lambdaQueryWrapper.like(EtStuWarning ::getMajor, o.getMajor());
        }

        if ( o.getTid()!=null ) {
            lambdaQueryWrapper.eq(EtStuWarning ::getTid, o.getTid());
        }
        if ( o.getCid()!=null ) {
            lambdaQueryWrapper.eq(EtStuWarning::getCid, o.getCid());
        }

        if ( o.getSelType()!=null && o.getSelType().equals("s") ) {

            lambdaQueryWrapper .and(wq -> wq
                    .gt(EtStuWarning::getNotSignNum, 2)
                    .or()
                    .gt(EtStuWarning::getNotTestNum,0));


        }

        List<EtStuWarning> li = stuWarningDao.selectList(lambdaQueryWrapper);

        return li;
    }