带参数的方法（导入更改导出）

类实施：

CLASS lcl_abap_class DEFINITION.
  PRIVATE SECTION.
    METHODS method1 IMPORTING iv_string TYPE string
                     CHANGING cv_string TYPE string
                    EXPORTING ev_string TYPE string.
ENDCLASS.

CLASS lcl_abap_class IMPLEMENTATION.
    METHOD method1.
        cv_string = iv_string.
        ev_string = 'example'.
    ENDMETHOD.
ENDCLASS.

方法调用示例：

method1 (
  EXPORTING iv_string = lv_string
  IMPORTING ev_string = lv_string2
   CHANGING cv_string = lv_string3
).