파일 upload - upload 파일 종류 file filter

  DATA: lv_file TYPE string,
        lv_filter type string,
        lt_file_table TYPE filetable WITH HEADER LINE ,
        lv_rc TYPE i.

  lv_file = p_file.
  lv_filter =
'Excel Files (*.xls)|*.xls|Excel 2007 Files (*.xlsx)|*.xlsx|All Files (*.*)|*.*|'.

  CALL METHOD cl_gui_frontend_services=>file_open_dialog
    EXPORTING
      window_title            = 'Window Title'
      default_filename        = lv_file
      file_filter             = lv_filter
    CHANGING
      file_table              = lt_file_table[]
      rc                      = lv_rc
    EXCEPTIONS
      file_open_dialog_failed = 1
      cntl_error              = 2
      error_no_gui            = 3
      not_supported_by_gui    = 4
      OTHERS                  = 5.
  IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*            WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  ENDIF.