about_Regular_Expressions
Letzte Aktualisierung: Mai 2014
Betrifft: Windows PowerShell 2.0, Windows PowerShell 3.0, Windows PowerShell 4.0, Windows PowerShell 5.0
Einführung hier einfügen.
THEMA
about_Regular_Expressions
KURZE BESCHREIBUNG
Beschreibt reguläre Ausdrücke in Windows PowerShell®.
LANGE BESCHREIBUNG
Windows PowerShell unterstützt die folgenden Zeichen für reguläre Ausdrücke.
Format Logic Example
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value Matches exact characters "book" -match "oo"
anywhere in the original value.
. Matches any single character. "copy" -match "c..y"
[value] Matches at least one of the "big" -match "b[iou]g"
characters in the brackets.
[range] Matches at least one of the "and" -match "[a-e]nd"
characters within the range.
The use of a hyphen (–) allows
you to specify an adjacent
character.
[^] Matches any characters except "and" -match "[^brt]nd"
those in brackets.
^ Matches the beginning "book" -match "^bo"
characters.
$ Matches the end characters. "book" -match "ok$"
* Matches any instances "baggy" -match "g*"
of the preceding character.
? Matches zero or one instance "baggy" -match "g?"
of the preceding character.
\ Matches the character that "Try$" -match "Try\$"
follows as an escaped character.
Windows PowerShell unterstützt die Zeichenklassen, die in regulären Ausdrücken in Microsoft .NET Framework verfügbar sind.
Format Logic Example
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\p{name} Matches any character in the "abcd defg" -match "\p{Ll}+"
named character class specified
by {name}. Supported names are
Unicode groups and block
ranges such as Ll, Nd,
Z, IsGreek, and IsBoxDrawing.
\P{name} Matches text not included in 1234 -match "\P{Ll}+"
the groups and block ranges
specified in {name}.
\w Matches any word character. "abcd defg" -match "\w+"
Equivalent to the Unicode (this matches abcd)
character categories [\p{Ll}
\p{Lu}\p{Lt}\p{Lo}\p{Nd}\p{Pc}].
If ECMAScript-compliant behavior
is specified with the ECMAScript
option, \w is equivalent to
[a-zA-Z_0-9].
\W Matches any nonword character. "abcd defg" -match "\W+"
Equivalent to the Unicode (This matches the space)
categories [^\p{Ll}\p{Lu}\p{Lt}
\p{Lo}\p{Nd}\p{Pc}].
\s Matches any white-space "abcd defg" -match "\s+"
character. Equivalent to the
Unicode character categories
[\f\n\r\t\v\x85\p{Z}].
\S Matches any non-white-space "abcd defg" -match "\S+"
character. Equivalent to the
Unicode character categories
[^\f\n\r\t\v\x85\p{Z}].
\d Matches any decimal digit. 12345 -match "\d+"
Equivalent to \p{Nd} for
Unicode and [0-9] for non-
Unicode behavior.
\D Matches any nondigit. "abcd" -match "\D+"
Equivalent to \P{Nd} for
Unicode and [^0-9] for non-
Unicode behavior.
Windows PowerShell unterstützt die Quantifizierer, die in regulären Ausdrücken in .NET Framework verfügbar sind. Es folgen einige Beispiele für Quantifizierer.
Format Logic Example
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* Specifies zero or more matches; "abc" -match "\w*"
for example, \w* or (abc)*.
Equivalent to {0,}.
+ Matches repeating instances of "xyxyxy" -match "xy+"
the preceding characters.
? Specifies zero or one matches; "abc" -match "\w?"
for example, \w? or (abc)?.
Equivalent to {0,1}.
{n} Specifies exactly n matches; "abc" -match "\w{2}"
for example, (pizza){2}.
{n,} Specifies at least n matches; "abc" -match "\w{2,}"
for example, (abc){2,}.
{n,m} Specifies at least n, but no "abc" -match "\w{2,3}"
more than m, matches.
Alle Vergleiche in der obigen Tabelle ergeben „True“.
Beachten Sie, dass das Escapezeichen für reguläre Ausdrücke, ein umgekehrter Schrägstrich (\), sich vom Escapezeichen für Windows PowerShell unterscheidet. Das Escapezeichen für Windows PowerShell ist das Hochkommazeichen (`) (96 ASCII).
Weitere Informationen finden Sie unter dem Thema „Sprachelemente für reguläre Ausdrücke“ in der Microsoft Developer Network (MSDN)-Bibliothek unter https://go.microsoft.com/fwlink/?LinkId=133231.
SIEHE AUCH
about_Comparison_Operators
about_Operators