1、直接调用方法 cl_exithandler=>get_instance（老方法）

CLASS: cl_exithandler DEFINITION LOAD.  DATA: l_badi_instance TYPE REF TO zif_ex__get_matnrdata.  CALL METHOD cl_exithandler=>get_instance    EXPORTING      exit_name              = 'Z_GET_MATNRDATA'      null_instance_accepted = 'X'    CHANGING      instance               = l_badi_instance.  IF l_badi_instance IS NOT INITIAL.    CALL METHOD l_badi_instance->get_materials      EXPORTING        matnr = p_matnr      CHANGING        mara  = mara.  ENDIF.

2、使用GET BADI语句（新方法）

DATA: handle TYPE REF TO z_badi_calc_vat.  GET BADI handle FILTERS country = ctry.  CALL BADI handle->get_vat    EXPORTING      im_amount      = sum    CHANGING      ex_amount_vat  = vat      ex_percent_vat = percent.