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本程序演示ABAP内表数据如何转为JSON格式，以及JSON数据如何放入内表。

注：json字符串格式如：jsonstr = '[ {flag: "0",message: "abc"},{flag: "1",message: "abcdddd"}]'.

另注意转换key value双引号问题

*&---------------------------------------------------------------------*
*& Report  Z_YHY_TEST_JSON
*&
*&---------------------------------------------------------------------*
*&
*&
*&---------------------------------------------------------------------*

REPORT Z_YHY_TEST_JSON.
DATA: json_ser TYPE REF TO CL_TREX_JSON_SERIALIZER,
      json_des TYPE REF TO CL_TREX_JSON_DESERIALIZER.
DATA: jsonstr TYPE string.
DATA: BEGIN OF itab OCCURS 0,
  matnr LIKE makt-matnr,
  maktx LIKE makt-maktx,
  END OF itab.

START-OF-SELECTION.
  SELECT * INTO CORRESPONDING FIELDS OF TABLE itab
    FROM makt UP TO 10 ROWS.


***内表->JSON
  CREATE OBJECT json_ser
    EXPORTING
      data = itab[].
  CALL METHOD json_ser->SERIALIZE.
  CALL METHOD json_ser->GET_DATA
    RECEIVING
      rval = jsonstr.

WRITE: jsonstr.

***JSON->内表
  CREATE OBJECT json_des.
  CALL METHOD json_des->DESERIALIZE
    EXPORTING
      json = jsonstr
    IMPORTING
      abap = itab[].