docs: public void setPage(int totalCount) {
  
          //
          // 缓存中的数据
          //
          page.put(FrontEndInterfaceConstant.PAGE_NO, ThreadContext.getContext(FrontEndInterfaceConstant.PAGE_NO));
          page.put(FrontEndInterfaceConstant.PAGE_SIZE, ThreadContext.getContext(FrontEndInterfaceConstant.PAGE_SIZE));
          page.put(FrontEndInterfaceConstant.PAGE_ORDER_BY,
                      ThreadContext.getContext(FrontEndInterfaceConstant.PAGE_ORDER_BY));
          page.put(FrontEndInterfaceConstant.PAGE_ORDER, ThreadContext.getContext(FrontEndInterfaceConstant.PAGE_ORDER));
  
          // 业务总数
          page.put(FrontEndInterfaceConstant.TOTAL_COUNT, totalCount);
      }