若伊框架分页问题

分页失效的两种情况

主查询语句返回的集合进行二次处理并重新封装（遍历操作不影响）

public Map<String, Object> list(YourEntityClass entities,
                                @RequestParam(value = "pageNum",required = false) String pageNum,
                                @RequestParam(value = "pageSize",required = false) String pageSize)
{
    Map<String, Object> map = new HashMap<>();
    Integer pageNumInt = 1;
    if (pageNum != null) {
        pageNumInt = Integer.parseInt(pageNum);
    }
    Integer pageSizeInt = 10;
    if (pageSize != null) {
        pageSizeInt = Integer.parseInt(pageSize);
    }

    paperInfo.setIsdown("0");
    List<YourEntityClass> list = entityService.selectYourEntityClassList(entities);
    List<YourEntityClass> listSort = new ArrayList<>();
    int size = list.size();
    int pageStart = pageNumInt == 1 ? 0 : (pageNumInt - 1) * pageSizeInt;//截取的开始位置
    int pageEnd = size < pageNumInt * pageSizeInt ? size : pageNumInt * pageSizeInt;//截取的结束位置
    if (size > pageStart) {
        listSort = list.subList(pageStart, pageEnd);
    }
    if (list == null || list.size() == 0) {
        map.put("total", 0);
        map.put("rows", null);
        map.put("code", 200);
        map.put("msg","查询成功");
        return map;
    }
    map.put("total", size);
    map.put("rows", listSort);
    map.put("code", 200);
    map.put("msg","查询成功");
    return map;
}

主查询在mybatis中的resultMap映射关系中添加了collection

public TableDataInfo list(YourEntityClass entities)
{
    List<YourEntityClass> list = entityService.selectYourEntityClassList(entities);
    TableDataInfo rspData = new TableDataInfo();
    rspData.setCode(HttpStatus.SUCCESS);
    rspData.setMsg("查询成功");
    rspData.setRows(list);
    rspData.setTotal(list.size());
    return rspData;
}