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从sflight数据库表中检索航班信息，并将这些信息转换成HTML格式，然后下载或显示在前端

开发步骤

① 自定义一个数据类型 ty_sflight 来存储航班信息

② 声明内表和工作区变量，用于存储表头、字段、HTML内容和航班详细信息以及创建字段目录lt_fcat

③ 从sflight数据库表中选择数据并存储在lt_sflight内表中

④ 填充字段目录lt_fcat，并为每个字段设置描述

⑤ 循环遍历字段目录lt_fcat，为每个字段设置HTML表头和属性

提示Tips

WWW_ITAB_TO_HTML_HEADERS函数用于填充列标题

WWW_ITAB_TO_HTML_LAYOUT函数用于填充列单元格属性

⑥ 设置HTML显示的标题，并准备HTML内容，调用WWW_ITAB_TO_HTML函数，将内部表转换为HTML格式

提示Tips

WWW_ITAB_TO_HTML函数用于将内表数据转换为HTML

⑦ 将生成的HTML保存为文件，并尝试下载或在前端显示

激活并运行程序，效果如下图所示：

完整代码如下所示：

REPORT z437_test_2024.* 自定义数据类型
TYPES:BEGIN OF ty_sflight,carrid TYPE s_carr_id,         " 航线代码connid TYPE s_conn_id,         " 航班连接编号fldate TYPE s_date,            " 航班日期price  TYPE s_price,           " 航空运费currency TYPE s_currcode,      " 航班的本地货币
END OF ty_sflight.DATA: t_header TYPE STANDARD TABLE OF w3head WITH HEADER LINE,   " Header表头t_fields TYPE STANDARD TABLE OF w3fields WITH HEADER LINE, " Fields字段t_html TYPE STANDARD TABLE OF w3html,                      " Html内容wa_header TYPE w3head,w_head TYPE w3head.DATA: lt_sflight TYPE TABLE OF ty_sflight,      " Flights Details航班详细信息lt_fcat TYPE lvc_t_fcat WITH HEADER LINE. " Fieldcatalog字段目录*----------------------------------------------------------------------*
*  DESC: START-OF-SELECTION 事件
*----------------------------------------------------------------------*
START-OF-SELECTION." 从sflight表中选择最多10条数据记录SELECT * FROM sflightINTO CORRESPONDING FIELDS OF TABLE lt_sflightUP TO 10 ROWS.*----------------------------------------------------------------------*
*  DESC: END-OF-SELECTION 事件
*----------------------------------------------------------------------*
END-OF-SELECTION." 填充字段目录" 创建字段目录的循环，为每个字段设置描述lt_fcat-coltext = 'Airline Code'.APPEND lt_fcat.lt_fcat-coltext = 'Connection Number'.APPEND lt_fcat.lt_fcat-coltext = 'Flight date'.APPEND lt_fcat.lt_fcat-coltext = 'Airfare'.APPEND lt_fcat.lt_fcat-coltext = 'Currency'.APPEND lt_fcat." 填充表头和属性" 循环遍历字段目录，为每个字段设置表头和属性LOOP AT lt_fcat.w_head-text = lt_fcat-coltext." 调用函数，将内部表转换为HTML表头CALL FUNCTION 'WWW_ITAB_TO_HTML_HEADERS'EXPORTINGfield_nr          = sy-tabixtext              = w_head-textfgcolor           = 'black'bgcolor           = 'green'TABLESheader            = t_header." 调用函数，将内部表转换为HTML布局CALL FUNCTION 'WWW_ITAB_TO_HTML_LAYOUT'EXPORTINGfield_nr        = sy-tabixsize            = '3'fgcolor         = 'black'TABLESfields          = t_fields.ENDLOOP." 设置显示的标题wa_header-text = 'Flights Details'.wa_header-font = 'Arial'.wa_header-size = '2'." 准备HTML内容" 清空HTML表，然后调用函数将内部表转换为HTMLREFRESH t_html.CALL FUNCTION 'WWW_ITAB_TO_HTML'EXPORTINGtable_header           = wa_headerTABLEShtml                   = t_htmlfields                 = t_fieldsrow_header             = t_headeritable                 = lt_sflight." 下载HTML到前端" 调用函数，将生成的HTML保存为文件并下载CALL FUNCTION 'GUI_DOWNLOAD'EXPORTINGfilename                        = 'C:\Users\HP\Desktop\Flights.html'TABLESdata_tab                        = t_htmlEXCEPTIONSfile_write_error                = 1no_batch                        = 2gui_refuse_filetransfer         = 3invalid_type                    = 4no_authority                    = 5unknown_error                   = 6header_not_allowed              = 7separator_not_allowed           = 8filesize_not_allowed            = 9header_too_long                 = 10dp_error_create                 = 11dp_error_send                   = 12dp_error_write                  = 13unknown_dp_error                = 14access_denied                   = 15dp_out_of_memory                = 16disk_full                       = 17dp_timeout                      = 18file_not_found                  = 19dataprovider_exception          = 20control_flush_error             = 21OTHERS                          = 22.IF sy-subrc <> 0.MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgnoWITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.ENDIF." 在前端显示HTML文件" 调用方法，打开HTML文件CALL METHOD cl_gui_frontend_services=>executeEXPORTINGdocument               = 'C:\Users\HP\Desktop\Flights.html'operation              = 'OPEN'EXCEPTIONScntl_error             = 1error_no_gui           = 2bad_parameter          = 3file_not_found         = 4path_not_found         = 5file_extension_unknown = 6error_execute_failed   = 7synchronous_failed     = 8not_supported_by_gui   = 9others                 = 10.IF sy-subrc <> 0.MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgnoWITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.ENDIF.