ABAP正则表达式的使用

纵横四海

在一个论坛上面看到有人在问正则表达式的问题，特举例简单说明一下。
另外，REPLACE也支持REGEX关键字。
最后：只能是ECC6或者更高版本才可以(ABAP supports POSIX regular expressions as of Release 7.00)

REPORT  z_barry_test.

DATA: str TYPE string ,
      result_tab TYPE match_result_tab ,
      wa LIKE LINE OF result_tab.

*找出STRING里面的双字节字符
str = 'abc我啊adfsf们'.
FIND ALL OCCURRENCES OF REGEX '[^\x00-\xff]*' IN str RESULTS result_tab.
LOOP AT result_tab INTO wa.
  WRITE / str+wa-offset(wa-length).
ENDLOOP.

*找出STRING里面的单字节字符
str = 'abc我啊adfsf们'.
FIND ALL OCCURRENCES OF REGEX '[\x00-\xff]*' IN str RESULTS result_tab.
WRITE / '-----'.
LOOP AT result_tab INTO wa.
  WRITE / str+wa-offset(wa-length).
ENDLOOP.

*找出STRING里面的IP地址
str = 'IP1:172.16.32.12  IP2:192.168.1.1 '.
FIND ALL OCCURRENCES OF REGEX '\d+\.\d+\.\d+\.\d+' IN str RESULTS result_tab.
WRITE / '-----'.
LOOP AT result_tab INTO wa.
  WRITE / str+wa-offset(wa-length).
ENDLOOP.

*找出STRING里面的***-********格式的电话号码
str = 'IP1:172.16.32.12  021-12345678 '.
FIND ALL OCCURRENCES OF REGEX '\d{3}-\d{8}|\d{4}-\d{7}' IN str RESULTS result_tab.
WRITE / '-----'.
LOOP AT result_tab INTO wa.
  WRITE / str+wa-offset(wa-length).
ENDLOOP.

*找出STRING里面的15/18位身份证号码
str = 'IP1:172.16.32.12 3722198003041234 '.
FIND ALL OCCURRENCES OF REGEX '\d{15}|\d{18}' IN str RESULTS result_tab.
WRITE / '-----'.
LOOP AT result_tab INTO wa.
  WRITE / str+wa-offset(wa-length).
ENDLOOP.

***使用CLASS的例子：

REPORT  z_barry_test.

PARAMETERS: p_input TYPE string DEFAULT 'IP1:172.16.32.12  IP2:192.168.1.1 ' OBLIGATORY.

DATA: regex   TYPE REF TO cl_abap_regex,
      matcher TYPE REF TO cl_abap_matcher,
      match   TYPE c .

DATA: result_tab TYPE match_result_tab ,
      wa LIKE LINE OF result_tab.

CREATE OBJECT regex
  EXPORTING
    pattern     = '\d+\.\d+\.\d+\.\d+'
    ignore_case = 'X'.

TRY.
    CALL METHOD regex->create_matcher
      EXPORTING
        text    = p_input
*       table   =
      RECEIVING
        matcher = matcher .
  CATCH cx_sy_matcher .
ENDTRY.

TRY.
    CALL METHOD matcher->match "是否完全匹配
      RECEIVING
        success = match.
  CATCH cx_sy_matcher .
ENDTRY.

CALL METHOD matcher->find_all
  RECEIVING
    matches = result_tab.
LOOP AT result_tab INTO wa.
  WRITE / p_input+wa-offset(wa-length).
ENDLOOP.

***SAP给的判断Email地址的例子***

PARAMETERS email TYPE c LENGTH 30 LOWER CASE DEFAULT 'sap@sap.com'.

DATA matcher TYPE REF TO cl_abap_matcher.
matcher = cl_abap_matcher=>create( pattern = '\w+(\.\w+)*@(\w+\.)+(\w{2,4})'
                                   ignore_case = 'X'
                                   text = email ).
IF matcher->match( ) IS INITIAL.
  MESSAGE 'Wrong Format' TYPE 'I'.
ELSE.
  MESSAGE 'Format OK' TYPE 'I'.
ENDIF.

注：ECC6下有个专门测试正则表达式的工具程序：DEMO_REGEX_TOY