abap 读取文件的FM

TEXT_CONVERT_CSV_TO_SAP                    "CVS
TEXT_CONVERT_TEX_TO_SAP                    "tex
TEXT_CONVERT_TXT_TO_SAP                    "txt
TEXT_CONVERT_XLS_TO_SAP                    "xls
TEXT_CONVERT_XML_TO_SAP                    "xml
ALSM_EXCEL_TO_INTERNAL_TABLE  "可上传Excel和CSV，最大列50