ABAP学习之路 - Global Class

时间：2022-07-30 15:37:03

程序功能：根据航空公司编号（scarr-carrid）查找航空公司（scarr表）信息

学习点：Global Class, Static Method, Exception Handling, Structure

源代码：

1. Global Class（公用类）提供静态方法 GET_CARRIER, 以根据传入参数 IV-CARRID（航空公司编号）来查询航空公司信息

 1 class ZHRX_CLS_FLIGHTINFO definition
 2   public
 3   final
 4   create public .
 5 
 6 public section.
 7 
 8   class-methods GET_CARRIER
 9     importing
10       value(IV_CARRID) type SCARR-CARRID
11     exporting
12       !EV_CARRIER type SCARR
13     exceptions
14       EX_INVALID_INPUT
15       EX_ENTRY_NOT_FOUND .
16 protected section.
17 private section.
18 ENDCLASS.
19 
20 
21 
22 CLASS ZHRX_CLS_FLIGHTINFO IMPLEMENTATION.
23 
24 
25 * <SIGNATURE>---------------------------------------------------------------------------------------+
26 * | Static Public Method ZHRX_CLS_FLIGHTINFO=>GET_CARRIER
27 * +-------------------------------------------------------------------------------------------------+
28 * | [--->] IV_CARRID                      TYPE        SCARR-CARRID
29 * | [<---] EV_CARRIER                     TYPE        SCARR
30 * | [EXC!] EX_INVALID_INPUT
31 * | [EXC!] EX_ENTRY_NOT_FOUND
32 * +--------------------------------------------------------------------------------------</SIGNATURE>
33 method GET_CARRIER.
34   if ( iv_carrid is INITIAL ).
35     raise ex_invalid_input.
36   ELSE.
37     select single * from scarr
38       into ev_carrier
39       where carrid = iv_carrid.
40     if ( sy-subrc <> 0 ).
41       raise ex_entry_not_found.
42     endif.
43   endif.
44 endmethod.
45 ENDCLASS.

 

2. 提供用户输入和展示查询结果的可执行 Program

 1 *&---------------------------------------------------------------------*
 2 *& Report  ZHRX_PROG_CALL_CLS_METHOD
 3 *&
 4 *&---------------------------------------------------------------------*
 5 *& Get airline info by airline code, use global class static method
 6 *& by Rixin Hu
 7 *& 2014-12-04
 8 *&---------------------------------------------------------------------*
 9 
10 REPORT  ZHRX_PROG_CALL_CLS_METHOD.
11 
12 PARAMETERS pa_carr TYPE scarr-carrid.
13 
14 DATA: gs_carrier type scarr.
15 
16 CALL METHOD ZHRX_CLS_FLIGHTINFO=>GET_CARRIER
17   EXPORTING
18     IV_CARRID          = pa_carr
19   IMPORTING
20     EV_CARRIER         = gs_carrier
21   EXCEPTIONS
22     EX_INVALID_INPUT   = 1
23     EX_ENTRY_NOT_FOUND = 2
24 *    others             = 3
25         .
26 *IF SY-SUBRC <> 0.
27 * Implement suitable error handling here
28 case sy-subrc.
29   WHEN 0.
30     write: / gs_carrier-mandt,
31            / gs_carrier-carrid,
32            / gs_carrier-carrname,
33            / gs_carrier-currcode,
34            / gs_carrier-url.
35   when 1.
36     write: / 'Please enter valid airline code'.
37   when 2.
38     write: / 'Entry not found'.
39   ENDCASE.
40 *ENDIF.

 

标签：

相关文章