ABAP 正则表达式(第一部分)

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该博客主要介绍ABAP正则表达式相关内容。通过代码示例展示了不同类型的匹配，包括邮箱格式匹配、普通字符匹配、转义字符匹配和通配字符匹配等，每个示例都给出了字符模板、要匹配的字符及匹配结果。

*&---------------------------------------------------------------------*
*& Report YN_REGEX_DEMO_01
*&---------------------------------------------------------------------*
*& Author              :  NathanSun
*& Program Type        :  DEMO
*& Description         :  ABAP 正则表达式(第一部分)
*&---------------------------------------------------------------------*
REPORT YN_REGEX_DEMO_01.

DATA: MATCHER TYPE REF TO CL_ABAP_MATCHER,
      MATCH   TYPE C LENGTH 1.
*PATTERN参数代表字符模板，TEXT参数代表要匹配的字符，MATCH参数代表匹配结果，’X’表示匹配，SPACE表示不匹配。
MATCHER = CL_ABAP_MATCHER=>CREATE( PATTERN     = '\w+@\w+(\.\w+)+'
                                   TEXT        = '197498xxxx@qq.com' ).
MATCH = MATCHER->MATCH( ).

*---------------------------------------------------------------------------------------------------
*---------------------------------------------------------------------------------------------------
DATA: MATCHER_A TYPE REF TO CL_ABAP_MATCHER,
      MATCH_A   TYPE C LENGTH 1.
*普通字符的匹配，要求字符模板与匹配字符严格一一对应，否则匹配失败
MATCHER_A = CL_ABAP_MATCHER=>CREATE( PATTERN     = 'AB'
                                   TEXT        = 'AB' ).
MATCH_A = MATCHER_A->MATCH( ).

*---------------------------------------------------------------------------------------------------
*---------------------------------------------------------------------------------------------------
DATA: MATCHER_B TYPE REF TO CL_ABAP_MATCHER,
      MATCH_B   TYPE C LENGTH 1.
DATA: MATCHER_C TYPE REF TO CL_ABAP_MATCHER,
      MATCH_C   TYPE C LENGTH 1.
DATA: MATCHER_D TYPE REF TO CL_ABAP_MATCHER,
      MATCH_D   TYPE C LENGTH 1.
*转义字符:一些不便书写的字符，采用在前面加 "\" 的方法。例如

*\.匹配小数点（.）本身
MATCHER_B = CL_ABAP_MATCHER=>CREATE( PATTERN     = '.\.'
                                   TEXT        = 'a.' ).
MATCH_B = MATCHER_B->MATCH( ).

*\\代表 "\" 本身
MATCHER_C = CL_ABAP_MATCHER=>CREATE( PATTERN     = '\\w\\d'
                                   TEXT        = '\w\d' ).
MATCH_C = MATCHER_C->MATCH( ).

*\Q...\E中间的字符作为普通字符
MATCHER_D = CL_ABAP_MATCHER=>CREATE( PATTERN     = '\Q\a\d\E'
                                   TEXT        = '\a\d' ).
MATCH_D = MATCHER_D->MATCH( ).

*---------------------------------------------------------------------------------------------------
*---------------------------------------------------------------------------------------------------
DATA: MATCHER_E TYPE REF TO CL_ABAP_MATCHER,
      MATCH_E   TYPE C LENGTH 1.
DATA: MATCHER_F TYPE REF TO CL_ABAP_MATCHER,
      MATCH_F   TYPE C LENGTH 1.
DATA: MATCHER_G TYPE REF TO CL_ABAP_MATCHER,
      MATCH_G   TYPE C LENGTH 1.
*通配字符

*\d代表任意一个数字，0~9 中的任意一个
MATCHER_E = CL_ABAP_MATCHER=>CREATE( PATTERN     = '\d'
                                   TEXT        = '9' ).
MATCH_E = MATCHER_E->MATCH( ).

*\w代表任意一个字母或数字或下划线，也就是 A~Z,a~z,0~9,_ 中任意一个
MATCHER_F = CL_ABAP_MATCHER=>CREATE( PATTERN     = '\w\w'
                                   TEXT        = 'A_' ).
MATCH_F = MATCHER_F->MATCH( ).

*.代表小数点可以匹配除了换行符（\n）以外的任意一个字符
MATCHER_G = CL_ABAP_MATCHER=>CREATE( PATTERN     = '...'
                                   TEXT        = 'Ab3' ).
MATCH_G = MATCHER_G->MATCH( ).

WRITE:/ 'ABAP 正则表达式:' ,
      / MATCH ,
      / '普通字符:',
      / MATCH_A ,
      / '转义字符:',
      / MATCH_B ,
      / MATCH_C ,
      / MATCH_D ,
      / '通配字符:',
      / MATCH_E ,
      / MATCH_F ,
      / MATCH_G .