java.util.ArrayList cannot be cast to com.github.pagehelper.Page

源代码：

 public FormListResult querySendPageList(PageListIO io) {
        PageHelper.startPage(io.currentPage(), io.pageSize());

        WorkOrderSendIO workOrderSendIO = (WorkOrderSendIO) io.getFormData();
        
        Integer resutl = settingControlConfigMapper.findOverTimeByControlType(2);
        workOrderSendIO.setOutTimeS(resutl);
        //...其他代码
        Page page = (Page<WorkOrderSendResult>) workOrderMapper.queryWorkOrderSendPageList(io.buildSQLMap());
        return new FormListResult<WorkOrderSendResult>(page);
    }

说明：
PageHelper只会对靠近的第一个select查询语句进行分页，在这里对findOverTimeByControlType进行分页了，没有对queryWorkOrderSendPageList分页

解决方案：
将PageHelper移动一下位置就可以了

 public FormListResult querySendPageList(PageListIO io) {

        WorkOrderSendIO workOrderSendIO = (WorkOrderSendIO) io.getFormData();
        
        Integer resutl = settingControlConfigMapper.findOverTimeByControlType(2);
        workOrderSendIO.setOutTimeS(resutl);
        //...其他代码
        PageHelper.startPage(io.currentPage(), io.pageSize());
        Page page = (Page<WorkOrderSendResult>) workOrderMapper.queryWorkOrderSendPageList(io.buildSQLMap());
        return new FormListResult<WorkOrderSendResult>(page);
    }