spring-boot单表f复杂分页查询

public Page findPageBySearch(Map search, Integer page, Integer pageSize) {

        PageHelper.startPage(page,pageSize);

        //创建查询条件封装对象
        Example example = new Example(Brand.class);
        //创建where条件
        Example.Criteria criteria = example.createCriteria();

        if (search != null){
            //名称不为null,则根据名称模糊查询
            if(!StringUtils.isEmpty(search.get("name"))){

                criteria.andLike("name","%"+search.get("name")+"%");
            }
            //andEqualTo等于letter
            if (StringUtils.isEmpty(search.get("letter"))){
                criteria.andEqualTo("letter",search.get("letter"));
            }
        }
        Page brands = (Page)brandMapper.selectByExample(example);

        return brands;

    @GetMapping("/search/{page}/{pageSize}")
    public PageResult findPageBySearch(@RequestParam Map search,
                                              @PathVariable("page") Integer page,
                                              @PathVariable("pageSize") Integer pageSize){

        Page pageBySearch = brandService.findPageBySearch(search, page, pageSize);
        System.out.println("+++++++++"+pageBySearch);
        PageResult pageResult = new PageResult<>(pageBySearch.getTotal(),pageBySearch.getResult());
        return pageResult;



    }