cl_abap_char_utilities=>horizontal_tab 09 TAB符
cl_abap_char_utilities=>CR_LF 0D0A 回车换行
cl_abap_char_utilities=>VERTICAL_TAB 0B 垂直制表符
cl_abap_char_utilities=>NEWLINE 0A 换行
cl_abap_char_utilities=>FORM_FEED 0C 换页
cl_abap_char_utilities=>BACKSPACE 08 退格符