二维码在线生成网站：
http://www.makepic.com/qrcode.php
在网页上输入要生成的二维码数据源，校验级别和图片大小，点生成即可看到生成的二维码图片：
下面是用ABAP code 利用上述service生成二维码的代码：
DATA:ls_form type zcl_http_tool=>ty_name_pair,
lt_header type zcl_http_tool=>tt_name_pair,
lt_form type zcl_http_tool=>tt_name_pair,
lv_code type xstring.
ls_form = value #( name = 'data' value = 'testforQRCode' ).
APPEND ls_form TO lt_form.
ls_form = value #( name = 'level' value = 'M' ).
APPEND ls_form TO lt_form.
ls_form = value #( name = 'size' value = '6' ).
APPEND ls_form TO lt_form.
zcl_http_tool=>send_request( iv_url = 'http://www.makepic.com/qrcode.php'
iv_req_type = if_http_request=>co_request_method_post
it_form = lt_form ).
ls_form = value #( name = 'Referer' value = 'http://www.makepic.com/qrcode.php' ).
APPEND ls_form TO lt_header.
zcl_http_tool=>send_request( EXPORTING iv_url = 'http://www.makepic.com/mkqr.php?data=testforQRCode&level=M&size=6'
iv_req_type = if_http_request=>co_request_method_get
it_header = lt_header
IMPORTING ev_response = lv_code ).
testforQRCode对应生成的二维码：
用手机上的二维码扫描应用能够成功扫描出来：
zcl_http_tool的代码在我的github上（因为用于demo用途，没有加对应的出错处理）
