首先看FB01前台操作，前台成功了才能测试BAPI
一般而言FB01 对应的BAPI是用 BAPI_ACC_DOCUMENT_POST
另外还可以用 FI_DOCUMENT_GENERATE_AND_CLEAR
主要参数
注意
CALL FUNCTION 'CONVERT_TO_LOCAL_CURRENCY'
EXPORTING
* CLIENT = SY-MANDT
date = gs_info-checkdate
foreign_amount = l_price
foreign_currency = ls_info-currency
local_currency = l_local_currency
rate = 0
type_of_rate = 'M'
read_tcurr = 'X'
IMPORTING
* EXCHANGE_RATE =
* FOREIGN_FACTOR =
local_amount = l_local_amount
* LOCAL_FACTOR =
* EXCHANGE_RATEX =
* FIXED_RATE =
* DERIVED_RATE_TYPE =
EXCEPTIONS
no_rate_found = 1
overflow = 2
no_factors_found = 3
no_spread_found = 4
derived_2_times = 5
OTHERS = 6.
IF sy-subrc <> 0.
* Implement suitable error handling here
ENDIF.
"输入币种信息，00为转换的币种
CLEAR lwa_acccr.
lwa_acccr-posnr = l_posnr.
lwa_acccr-curtp = '00'.
lwa_acccr-waers = l_local_currency.
lwa_acccr-wrbtr = l_local_amount.
APPEND lwa_acccr TO lt_acccr.
CLEAR lwa_acccr.
lwa_acccr-posnr = l_posnr.
lwa_acccr-curtp = '10'.
lwa_acccr-waers = l_local_currency.
lwa_acccr-wrbtr = l_local_amount.
APPEND lwa_acccr TO lt_acccr.
CALL FUNCTION 'FI_DOCUMENT_GENERATE_AND_CLEAR'
EXPORTING
i_clr_trans = 'AUSGZAHL'
it_open_item_tab = lt_postab
i_simulation = g_simulate
CHANGING
cs_acchd = lwa_acchd
ct_accit = lt_accit
ct_acccr = lt_acccr.
最简单的demo代码
CLEAR cs_acchd.
CLEAR ls_accit.
CLEAR ls_accir.
CLEAR ct_accit[].
CLEAR ct_acccr[].
cs_acchd-usnam = sy-uname.
cs_acchd-tcode = 'FB01'.
cs_acchd-cpudt = sy-datum.
cs_acchd-cputm = sy-uzeit.
cs_acchd-bktxt = ‘’
ls_accit-posnr = 1.
ls_accit-bukrs =
ls_accit-gjahr =
ls_accit-bldat =
ls_accit-budat =
ls_accit-monat =
ls_accit-blart = 'SA'.
ls_accit-bschl = '40'.
ls_accit-sgtxt =
ls_accit-hkont =
APPEND ls_accit TO ct_accit.
ls_accit-posnr = 2.
ls_accit-bschl = '50'.
ls_accit-hkont =
APPEND ls_accit TO ct_accit.
ls_accir-posnr = 1.
ls_accir-curtp = '00'.
ls_accir-waers = gs_t001-waers.
ls_accir-wrbtr =
APPEND ls_accir TO ct_acccr.
ls_accir-posnr = 1.
ls_accir-curtp = 10.
ls_accir-waers = gs_t001-waers.
ls_accir-wrbtr =
APPEND ls_accir TO ct_acccr.
ls_accir-posnr = 2.
ls_accir-curtp = '00'.
ls_accir-waers = gs_t001-waers.
ls_accir-wrbtr =
APPEND ls_accir TO ct_acccr.
ls_accir-posnr = 2.
ls_accir-curtp = 20.
ls_accir-waers = gs_t001-waers.
ls_accir-wrbtr =
APPEND ls_accir TO ct_acccr.
CALL FUNCTION 'FI_DOCUMENT_GENERATE_AND_CLEAR'
EXPORTING
i_clr_trans = 'AUSGZAHL'
it_open_item_tab = it_open_item_tab
* I_SIMULATION = ' '
CHANGING
cs_acchd = cs_acchd
ct_accit = ct_accit
ct_acccr = ct_acccr.
这个BAPI的好处是，参数比较多，具体参数可以自己查看。
但是这个bapi没有return参数，出错的时候麻烦，
而如果成功，会直接弹出一个对话框，需要用点一下才能继续，批导不能用，
对话框显示是代码写死的，判断条件是 simulation 非空，所以去不掉。
如果BAPI_ACC_DOCUMENT_POST参数不满足的时候，可以考虑这个BAPI
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