20.3.     FTP

FTP_CONNECT

FTP_COMMAND

FTP_DISCONNECT

20.4.     文件读写

DATA: file TYPE string VALUE `jzjflights.dat`,
      wa   TYPE spfli.
OPEN DATASET file FOR OUTPUT IN BINARY MODE.
SELECT *
       FROM spfli
       INTO wa.
  TRANSFER wa TO file. "写
ENDSELECT.
CLOSE DATASET file.

DATA: file TYPE string VALUE `jzjflights.dat`,
      wa   TYPE spfli.
OPEN DATASET file FOR INPUT IN BINARY MODE.
DO.
  "由于没有使用MAXIMUM LENGTH选项，所以每次读取的最大字节数由wa所占字节数决定
  READ DATASET file INTO wa. "读
  IF sy-subrc = 0.
    WRITE: / wa-carrid,
             wa-connid,
             wa-countryfr,
             wa-cityfrom,
             wa-cityto,
             wa-fltime,
             wa-distance.
  ELSE.
    EXIT.
  ENDIF.
ENDDO.
CLOSE DATASET file.