mybatis 中 or 的使用

NoticeCoreExample noticeCoreExample = new NoticeCoreExample();
NoticeCoreExample.Criteria criteria = noticeCoreExample.createCriteria();
NoticeCoreExample.Criteria criteriaMemberName = noticeCoreExample.createCriteria();
noticeCoreExample.setOrderByClause("create_at DESC");
noticeCoreExample.setPage(page);
criteria.andIsDeleteEqualTo(false);
criteriaMemberName.andIsDeleteEqualTo(false);
if(noticeCoreDTO != null){
    if(!StringUtil.isEmpty(noticeCoreDTO.getTitleOrMemberName())){
        criteria.andTitleLike(SQLUtil.toLink(noticeCoreDTO.getTitleOrMemberName()));
        criteria.andMemberNameLike(SQLUtil.toLink(noticeCoreDTO.getTitleOrMemberName()));
        noticeCoreExample.or(criteriaMemberName);
    }
    List<NoticeCore> noticeCores = noticeCoreMapper.selectByExample(noticeCoreExample);
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