springBoot1.5.9+pagehelper5.0每页显示数量居然等于总记录数？！

springBoot1.5.9+mybatis+oracle+pagehelper5.0

每页显示数量居然等于总记录数？！ 下面这个是我的方法：

public ServiceResponse queryPageByParams(String groupName,String userName, int currentPage, int pageSize) throws Exception{
    PageHelper.startPage(currentPage, pageSize);//如1,5
    List<CheckGroupVo> checkGroupVoList = checkGroupUserDao.queryPageByParams(groupName,userName);//查出来的结果是13条
    if(checkGroupVoList == null){
        return ServiceResponse.createByResponseCode(ResponseCode.NOT_EXIST);
    }
    PageInfo info = new PageInfo(checkGroupVoList);
    System.out.println(info.getList());//经过上面PageInfo后，pageSize居然等于总记录数13！！！
    return ServiceResponse.createByResponseCodeData(ResponseCode.GET_SUCCESS, new PageInfo(checkGroupVoList));
}

然后调试进入new PageInfo时，居然进入下面的 else if (list instanceof Collection)条件，把查询出来的总记录数赋值给每页显示数量 this.pageSize = list.size();！！！！什么情况？

public PageInfo(List<T> list, int navigatePages) {
        super(list);
        if (list instanceof Page) {
            Page page = (Page) list;
            this.pageNum = page.getPageNum();
            this.pageSize = page.getPageSize();

            this.pages = page.getPages();
            this.size = page.size();
            //由于结果是>startRow的，所以实际的需要+1
            if (this.size == 0) {
                this.startRow = 0;
                this.endRow = 0;
            } else {
                this.startRow = page.getStartRow() + 1;
                //计算实际的endRow（最后一页的时候特殊）
                this.endRow = this.startRow - 1 + this.size;
            }
        }else if (list instanceof Collection) {
            this.pageNum = 1;
            this.pageSize = list.size();

            this.pages = this.pageSize > 0 ? 1 : 0;
            this.size = list.size();
            this.startRow = 0;
            this.endRow = list.size() > 0 ? list.size() - 1 : 0;
        }
        if (list instanceof Collection) {
            this.navigatePages = navigatePages;
            //计算导航页
            calcNavigatepageNums();
            //计算前后页，第一页，最后一页
            calcPage();
            //判断页面边界
            judgePageBoudary();
        }
    }

abel533 / Mybatis-Spring

springBoot1.5.9+pagehelper5.0每页显示数量居然等于总记录数？！ #34