MybatisPlus查询小例子

@Override
public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId) {
    QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<>();
    if(catelogId != 0) {
        queryWrapper.eq("catelog_id", catelogId);
    }
    String key = (String) params.get("key");
    if(!StringUtils.isEmpty(key)) {
        queryWrapper.and((wrapper) -> {
            wrapper.eq("attr_id", key).or().like("attr_name", key);
        });
    }
    IPage<AttrEntity> page = this.page(
            new Query<AttrEntity>().getPage(params),
            queryWrapper
    );
    return new PageUtils(page);
}