今天有个兄弟问如何实现以XML的方式输出内表的内容，这个问题我以前好像没有写过。倒不是不会写，而是写的方法太多了，有极其简单的，也有很复杂的，而且网上资料也很多。
找到以前写的一个程序，稍微修改了一下，能实现一般的功能。
*&---------------------------------------------------------------------*
*& Report Z_BARRY_TEST_XML
*&
*&---------------------------------------------------------------------*
*& 46C - ECC6 通用
*&---------------------------------------------------------------------*
REPORT z_barry_test_xml.
DATA: BEGIN OF itab_matnr OCCURS 0 ,
matnr LIKE mara-matnr ,
maktx LIKE makt-maktx ,
END OF itab_matnr .
DATA: BEGIN OF itab_class OCCURS 0 ,
class LIKE m_wwgha-class,"部门
kschl LIKE m_wwgha-kschl,"DESC
END OF itab_class .
DATA: l_ixml TYPE REF TO if_ixml,
l_encoding TYPE REF TO if_ixml_encoding,
l_comment TYPE REF TO if_ixml_comment,
l_doc TYPE REF TO if_ixml_document,
l_root TYPE REF TO if_ixml_element,
l_item TYPE REF TO if_ixml_element,
l_element TYPE REF TO if_ixml_element,
l_attribute TYPE REF TO if_ixml_attribute,
l_ostream TYPE REF TO if_ixml_ostream,
l_factory TYPE REF TO if_ixml_stream_factory.
TYPES: BEGIN OF xml_line,
data(256) TYPE x,
END OF xml_line.
DATA: xml_table TYPE TABLE OF xml_line,
xml_size TYPE i.
DATA: l_rval TYPE i.
START-OF-SELECTION.
PERFORM getdata.
PERFORM create_xml.
PERFORM download.
*---------------------------------------------------------------------*
* FORM getdata *
*---------------------------------------------------------------------*
FORM getdata.
SELECT matnr maktx FROM makt
INTO TABLE itab_matnr
UP TO 4 ROWS
WHERE spras = '1' .
SELECT class kschl FROM m_wwgha
INTO TABLE itab_class
UP TO 4 ROWS
WHERE spras IN ('1','E') .
DELETE itab_class WHERE class = '0'.
APPEND itab_class. "演示空数据
ENDFORM.
*---------------------------------------------------------------------*
* FORM create_xml *
*---------------------------------------------------------------------*
FORM create_xml.
CLASS cl_ixml DEFINITION LOAD.
l_ixml = cl_ixml=>create( ).
CALL METHOD l_ixml->create_encoding
EXPORTING
byte_order = 0
character_set = 'gb2312'
RECEIVING
rval = l_encoding .
CALL METHOD l_ixml->create_document
RECEIVING
rval = l_doc .
CALL METHOD l_doc->set_encoding
EXPORTING
encoding = l_encoding .
CALL METHOD l_doc->create_simple_element
EXPORTING
name = 'Root'
parent = l_doc
RECEIVING
rval = l_root .
CALL METHOD l_root->set_attribute
EXPORTING
name = 'ATTRIBUTE'
value = 'sample'
RECEIVING
rval = l_rval .
CALL METHOD l_doc->create_comment
EXPORTING
comment = '''上面ATTRIBUTE为属性示例'''
RECEIVING
rval = l_comment .
CALL METHOD l_root->append_child
EXPORTING
new_child = l_comment
RECEIVING
rval = l_rval.
PERFORM fill_itab2xml TABLES itab_matnr
USING 'Products'
'Product'
l_root.
PERFORM fill_itab2xml TABLES itab_class
USING 'Categories'
'Categorie'
l_root.
CALL METHOD l_ixml->create_stream_factory
RECEIVING
rval = l_factory .
CALL METHOD l_factory->create_ostream_itable
EXPORTING
table = xml_table
RECEIVING
rval = l_ostream .
CALL METHOD l_doc->render
EXPORTING
ostream = l_ostream
recursive = 'X' .
CALL METHOD l_ostream->get_num_written_raw
RECEIVING
rval = xml_size .
ENDFORM.
*---------------------------------------------------------------------*
* FORM download *
*---------------------------------------------------------------------*
FORM download.
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
bin_filesize = xml_size
filename = 'C:\ECC6.XML'
filetype = 'BIN'
TABLES
data_tab = xml_table.
ENDFORM.
*---------------------------------------------------------------------*
* FORM fill_itab *
*---------------------------------------------------------------------*
FORM fill_itab2xml TABLES intab
USING node1name TYPE string
node2name TYPE string
l_parent TYPE REF TO if_ixml_element.
DATA: BEGIN OF headtab OCCURS 0 ,
length TYPE i ,
decimals TYPE i,
type_kind TYPE c,
name(30) TYPE c,
END OF headtab.
DATA descr_ref TYPE REF TO cl_abap_structdescr.
FIELD-SYMBOLS: TYPE abap_compdescr ,
,
TYPE ANY .
DATA: n TYPE i ,
str TYPE string ,
itemname TYPE string ,
text1 TYPE c ,
l_node TYPE REF TO if_ixml_element ,
l_item TYPE REF TO if_ixml_element .
descr_ref ?= cl_abap_typedescr=>describe_by_data( intab ).
LOOP AT descr_ref->components ASSIGNING .
MOVE-CORRESPONDING TO headtab.
APPEND headtab.
ENDLOOP.
CALL METHOD l_doc->create_simple_element
EXPORTING
name = node1name
parent = l_parent
RECEIVING
rval = l_node .
DESCRIBE TABLE headtab LINES n.
LOOP AT intab ASSIGNING .
CALL METHOD l_doc->create_simple_element
EXPORTING
name = node2name
parent = l_node
RECEIVING
rval = l_item .
DO n TIMES.
ASSIGN COMPONENT sy-index OF STRUCTURE TO .
str = .
READ TABLE headtab INDEX sy-index.
IF headtab-type_kind = 'I' OR headtab-type_kind = 'P'
OR headtab-type_kind = 'F'.
SEARCH str FOR '-'.
IF sy-subrc = 0 AND sy-fdpos <> 0.
SPLIT str AT '-' INTO str text1.
CONDENSE str.
CONCATENATE '-' str INTO str.
ELSE.
CONDENSE str.
ENDIF.
ELSE.
* SHIFT str LEFT DELETING LEADING '0' .
ENDIF.
itemname = headtab-name .
CALL METHOD l_doc->create_simple_element
EXPORTING
name = itemname
parent = l_item
value = str
RECEIVING
rval = l_element .
ENDDO.
ENDLOOP.
ENDFORM.
如果是ECC 5.0或者以后的系统，推荐使用Simple Transformations:
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