如何进行各种码制数据之间转换

1 系统内部转换命令(一般建议不直接使用)
SYSTEM-CALLCONVERT ID id DATA data
ENCODING encoding
ENDIAN endian
IGNORE_CERR ignore_cerr N n
POSITION position
REPLACEMENT replacement
LEN len
BUFFER buffer
ERR err.
Text and lines are converted between different formats.

2 使用SAP系统封装的类CL_ABAP_CONV_IN_CE and CL_ABAP_CONV_OUT_CE
样例
data STR TYPE C.

DATA: S TYPE STRING,
LEN TYPE I.
DATA: CVTI_UTF8 TYPE REF TO CL_ABAP_CONV_IN_CE.
FIELD-SYMBOLS : <X> TYPE X.

ASSIGN STR TO <X> CASTING.

CVTI_UTF8 = CL_ABAP_CONV_IN_CE=>CREATE( ENCODING = 'UTF-8' INPUT = <X> ).

CALL METHOD CVTI_UTF8->READ
IMPORTING
DATA = S
LEN = LEN
EXCEPTIONS OTHERS = 1.

STR = S.

3 使用sap封装的Form
要包含以下单元:RSCPICINC
封装的form
CONV_TO_ASCII
CONV_TO_EBCDIC
CONV_TO_UTF8
CONV_FROM_ASCII
CONV_FROM_ASCII
CONV_FROM_EBCDIC

4使用sap封装的函数(外部->系统默认代码,系统默认代码->外部)
function translate_codepage_in.
*" IMPORTING
*" VALUE(CODEPAGE_FROM) TYPE ABAP_ENCOD
*" TABLES
*" T_DATA
*" EXCEPTIONS
*" ERROR_TRANSLATE
function translate_codepage_out.
*" IMPORTING
*" VALUE(CODEPAGE_FROM) TYPE ABAP_ENCOD
*" TABLES
*" T_DATA
*" EXCEPTIONS
*" ERROR_TRANSLATE

5使用TRANSLATE命令
TRANSLATE c ...FROM CODE PAGE g1... TO CODE PAGE g2.

6常见代码编号
EBCDIC = '0100'
ASCII = '1100'
UTF8 = 'UTF-8'

7 相关的元素
ABAP_ENCOD
TCP00(表)