如何在SAP ECC中调用外部系统提供的REST接口地址？

Postman中使用Body中参数情况，使用链接的情况

x-www-form-urlencoded

POST成功调用样例如下：

SAP中实现如下：

1. 事务码STRUST,导入对方系统证书

2. 事务码SM59配置destination

外部系统提供的接口地址：

https://dev-api.jushuitan.com/open/jushuitan/otherinout/upload

测试连接

返回200表示成功

3. 代码实现：

*&---------------------------------------------------------------------*
*& Report  ZTEST_JST
*&
*&---------------------------------------------------------------------*
*&
*&
*&---------------------------------------------------------------------*

REPORT ztest_jst.

"发送
DATA: lo_http_client  TYPE REF TO if_http_client.
DATA: lv_respon TYPE string.
DATA: lv_ssl_id   TYPE ssfapplssl VALUE 'ANONYM'.
DATA: lv_string TYPE string.
DATA: lv_timestamp TYPE string.
DATA: lv_sign TYPE string.
DATA: lv_biz TYPE string.
DATA: lv_jason TYPE string.
DATA: lv_hashstring TYPE string.
DATA: message TYPE string.
DATA: msgtyp TYPE char1.

"请求时间，时间戳格式(Unix 纪元到当前时间的秒数),API服务端允许客户端请求最大时间误差为10分钟。
DATA: lv_sydatum TYPE sy-datum,
      lv_syuzeit TYPE sy-uzeit.

"创建客户端请求
CALL METHOD cl_http_client=>create_by_destination
  EXPORTING
    destination              = 'JST'
  IMPORTING
    client                   = lo_http_client
  EXCEPTIONS
    argument_not_found       = 1
    destination_not_found    = 2
    destination_no_authority = 3
    plugin_not_active        = 4
    internal_error           = 5
    OTHERS                   = 6.
IF sy-subrc <> 0.
  MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno WITH
             sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  EXIT.
ENDIF.

"设定传输请求内容格式以及编码格式
lo_http_client->request->set_content_type( content_type = 'application/x-www-form-urlencoded;charset=UTF-8' ).

"设定调用服务
lo_http_client->request->set_method( if_http_request=>co_request_method_post ).

lo_http_client->propertytype_accept_cookie = lo_http_client->co_enabled.

lv_sydatum = sy-datum.
lv_syuzeit = sy-uzeit.
cl_pco_utility=>convert_abap_timestamp_to_java(
EXPORTING
  iv_date      = lv_sydatum  "sy-datum
  iv_time      = lv_syuzeit  "sy-uzeit
IMPORTING
  ev_timestamp = lv_timestamp ).

lv_timestamp = lv_timestamp(10) - 8 * 60 * 60.
CONDENSE lv_timestamp.

lv_biz = '{"external_id": "2023111311287","type": "in","is_confirm": true,"items": [{"batch_id": "","qty": 120,"sku_id": "YC.01.0001","remark": "测试","expiration_date": "","sale_price": 0,"produced_date": ""}]}'.
CONDENSE lv_biz.

lv_string = '99c4cef262f34ca882975a7064de0b87' && 'access_token' && 'b7e3b1e24e174593af8ca5c397e53dad'
            && 'app_key' && 'b0b7d1db226d4216a3d58df9ffa2dde5' && 'biz' && lv_biz
            && 'charset' && 'utf-8' && 'timestamp' && lv_timestamp && 'version' && '2'.
CONDENSE lv_string.

CALL FUNCTION 'CALCULATE_HASH_FOR_CHAR'
  EXPORTING
    alg            = 'MD5'
    data           = lv_string
  IMPORTING
    hashstring     = lv_hashstring
  EXCEPTIONS
    unknown_alg    = 1
    param_error    = 2
    internal_error = 3
    OTHERS         = 4.
lv_sign = lv_hashstring.
TRANSLATE lv_sign TO LOWER CASE.

lv_jason = 'app_key=' && 'b0b7d1db226d4216a3d58df9ffa2dde5' && '&access_token=' &&
            'b7e3b1e24e174593af8ca5c397e53dad' && '&timestamp=' && lv_timestamp
            && '&charset=' && 'utf-8' && '&version=' && '2' && '&sign=' && lv_sign
            && '&biz=' && lv_biz.

*在POSTMAN中，调用时自动将参数进行urlencode转换，调用如果需要，可以如上使用方法转换
*lv_time_64 = cl_http_utility=>escape_url( timestamp ).  "escape_url

"设置待传输内容
lo_http_client->request->set_data( cl_abap_codepage=>convert_to( source = lv_jason ) ).

"发送请求
lo_http_client->send(  EXCEPTIONS http_communication_failure = 1
                                  http_invalid_state         = 2 ).

IF sy-subrc <> 0.
  "操作失败，获取失败原因
  lo_http_client->get_last_error( IMPORTING message = message ).
  msgtyp = 'E'.
ENDIF.

"读取远程服务返回的处理过结果。
lo_http_client->receive( EXCEPTIONS http_communication_failure = 1
                                    http_invalid_state         = 2
                                    http_processing_failed     = 3 ).
IF sy-subrc <> 0 .
  "lv_subrc = sy-subrc.
  lo_http_client->get_last_error( IMPORTING message = message ).
  msgtyp = 'E'.
ELSE.
  "读取返回返回内容
  CLEAR lv_respon.
  lv_respon = lo_http_client->response->get_cdata( ).

*  DATA: lv_xmldata TYPE xstring .
*  DATA: lt_result_xml TYPE STANDARD TABLE OF smum_xmltb,
*        ls_result_xml TYPE smum_xmltb.
*  DATA: lt_return TYPE STANDARD TABLE OF bapiret2 .

*  CALL FUNCTION 'SCMS_STRING_TO_XSTRING'
*    EXPORTING
*      text   = lv_respon
*    IMPORTING
*      buffer = lv_xmldata.
*
*  CALL FUNCTION 'SMUM_XML_PARSE'
*    EXPORTING
*      xml_input = lv_xmldata
*    TABLES
*      xml_table = lt_result_xml
*      return    = lt_return.
  "解析JSON串
  TYPES: BEGIN OF lty_recdata,
          msg TYPE string,
          code TYPE i,
         END OF lty_recdata.
  DATA:  ls_recdata TYPE lty_recdata.

  CLEAR:ls_recdata.
  /ui2/cl_json=>deserialize( EXPORTING json = lv_respon
                                       pretty_name = 'X'
                             CHANGING data = ls_recdata ).

ENDIF.
"关闭接口
CALL METHOD lo_http_client->close.