输入列号得到excel对应的字母列

zexcel_cell_column 类型是INT4

FUNCTION ZGET_EXCEL_COL.
*"----------------------------------------------------------------------
*"*"本地接口：
*"  IMPORTING
*"     REFERENCE(I_COL) TYPE  I
*"  EXPORTING
*"     REFERENCE(E_COL) TYPE  C
*"----------------------------------------------------------------------

  DATA:       LV_UCCPI                        TYPE I,
              LV_TEXT                         TYPE SYCHAR02,
              LV_MODULE                       TYPE INT4,
              LV_COLUMN                       TYPE ZEXCEL_CELL_COLUMN.

  LV_COLUMN = I_COL .
*--------------------------------------------------------------------*
* Check whether column is in allowed range for EXCEL to handle ( 1-16384 )
*--------------------------------------------------------------------*
*  IF   lv_column > 16384
*    OR lv_column < 1.
*    RAISE EXCEPTION TYPE zcx_excel
*      EXPORTING
*        error = 'Index out of bounds'.
*  ENDIF.

*--------------------------------------------------------------------*
* Build alpha representation of column
*--------------------------------------------------------------------*
  WHILE LV_COLUMN GT .

    LV_MODULE = ( LV_COLUMN -  ) MOD .
    LV_UCCPI  =  + LV_MODULE.

    LV_COLUMN = ( LV_COLUMN - LV_MODULE ) / .

    LV_TEXT   = CL_ABAP_CONV_IN_CE=>UCCPI( LV_UCCPI ).
    CONCATENATE LV_TEXT E_COL INTO E_COL.
  ENDWHILE.
ENDFUNCTION.