如何将这个JavaScript正则表达式翻译成Java？

如何将这个JavaScript正则表达式翻译成Java

它从字符串中删除标点符号：

strippedStr = str.replace(/[\.,-\/#!$%\^&\*;:{}=\-_`~()]/g,"");

不是爪哇人，而是：

public static final String expression = "[\\s\\p{Punct}]";

---

来源：

regexp末尾的

g

表示它是全局的；等效的Java

String

方法是（它接受一个搜索regexp和一个替换字符串）。您需要对regexp本身做的唯一一件事就是转义

\

s，因为当您试图转义

时，Java解析器将解释类似

\.

的内容：

String strippedStr = str.replaceAll("[\\.,-\\/#!$%\\^&\\*;:{}=\\-_`~()]", "");

---

这里不需要

s//

内容，只需传递正则表达式，这里是一个字符类

public static void main(String [] args)
{
    String s = ".,/#!$%^&*;:{}=-_`~()./#hello#&%---#(($";
    String n = s.replaceAll("[-.,/#!$%^&*;:{}=_`~()]", "");
    System.out.println(n); // should print "hello"

    // using POSIX character class which matches any of:
    // !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
    String p = s.replaceAll("\\p{Punct}", "");
    System.out.println(p);
}

publicstaticvoidmain（字符串[]args）
{
字符串s=“，/#！$%^&*；：{}=-`~（）。/#你好#&%-#（$”；
字符串n=s.replaceAll（“[-，/#！$%^&*；：{}=”，“）；
System.out.println（n）；//应该打印“hello”
//使用与以下任一项匹配的POSIX字符类：
// !"#$%&'()*+,-./:;?@[\]^_`{|}~
字符串p=s.replaceAll（\\p{Punct}，“”）；
系统输出println（p）；
}

此处为Java正则表达式的语法：

上面使用的POSIX字符类比您拥有的稍多，因此我不确定它是否适合您的需要

• 已编辑，因为不需要在字符类中转义
  。
• 编辑以将

  -

  移动到字符类的开头，因此它没有特殊意义

---

这个角色类不会以更简洁的方式完成任务吗

str.replaceAll("[\\W_]", "");

---

如果您希望使用所有标点符号而不是ASCII，则需要使用：

String new_string = old_string.replaceAll("[\\pS\\pP]", "");

这是因为你称之为标点符号的一些东西实际上是符号，如下所示：

---

@Joey-这就是Java文档对它们的称呼，所以我使用了它们的术语。@Joey:不，这是错误的。Java这个流口水的白痴将POSIX类映射为类似Unicode属性的东西，而不是。所以

\p{punct}

仅为ASCII，甚至不是当前区域设置。您需要使用

\fP

访问Unicode

\p{标点符号}

General Category。是的，我认为它真的很愚蠢。@Birryee:那不行。看看原因。@Birryee:你把它称为POSIX字符类是相当准确的，因为那就像是一个ASCII类型的函数。不幸的是，它没有人们想要的那么好。这不起作用，因为我同意正确的方法是使用

\pP

，但是对于

\s

，您必须将其通过my，这将更正任何

\s

以读取

[\u000A\u000B\u000C\u000D\u0020\u0085\u00A0\u1680\u180E\u20001\u2002\u2003\u2004\u2006\u2007a\u20028\u20029\u2005f]

'Fraid不是。除了反斜杠这个和那个元字符，您可以使用Java在模式编译期间处理的

\Q

元引用转换转义。这样您就可以简单地使用

“[\\Q，-/\\\！$%^&*：{}=-\\\\\\\\\\\E]“

作为函数的第一个参数。此外，除了方括号字符类中的

-

或初始

^

之外，不需要转义任何内容。

$ uniprops - \\ . , / '#' ! '$' % ^ '&' '*' ';' : { } = _ '`' '~' '(' ')'
   U+002D ‹-› \N{ HYPHEN-MINUS }:
    \pP \p{Pd}
    All Any ASCII Assigned Common Zyyy Dash Dash_Punctuation Pd P Gr_Base Grapheme_Base Graph GrBase Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+005C ‹\› \N{ REVERSE SOLIDUS }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+002E ‹.› \N{ FULL STOP }:
    \pP \p{Po}
    All Any ASCII Assigned Case_Ignorable CI Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation STerm Term Terminal_Punctuation XPosixGraph XPosixPrint XPosixPunct
U+002C ‹,› \N{ COMMA }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation Term Terminal_Punctuation XPosixGraph XPosixPrint XPosixPunct
U+002F ‹/› \N{ SOLIDUS }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+0023 ‹#› \N{ NUMBER SIGN }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+0021 ‹!› \N{ EXCLAMATION MARK }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation STerm Term Terminal_Punctuation XPosixGraph XPosixPrint XPosixPunct
U+0024 ‹$› \N{ DOLLAR SIGN }:
    \pS \p{Sc}
    All Any ASCII Assigned Common Zyyy Currency_Symbol Sc S Gr_Base Grapheme_Base Graph GrBase Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Symbol XPosixGraph XPosixPrint XPosixPunct
U+0025 ‹%› \N{ PERCENT SIGN }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+005E ‹^› \N{ CIRCUMFLEX ACCENT }:
    \pS \p{Sk}
    All Any ASCII Assigned Case_Ignorable CI Common Zyyy Dia Diacritic Sk S Gr_Base Grapheme_Base Graph GrBase Math Modifier_Symbol Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Symbol XPosixGraph XPosixPrint XPosixPunct
U+0026 ‹&› \N{ AMPERSAND }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+002A ‹*› \N{ ASTERISK }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+003B ‹;› \N{ SEMICOLON }:
    \pP \p{Po}
    All Any ASCII Assigned Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation Term Terminal_Punctuation XPosixGraph XPosixPrint XPosixPunct
U+003A ‹:› \N{ COLON }:
    \pP \p{Po}
    All Any ASCII Assigned Case_Ignorable CI Common Zyyy Po P Gr_Base Grapheme_Base Graph GrBase Other_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation Term Terminal_Punctuation XPosixGraph XPosixPrint XPosixPunct
U+007B ‹{› \N{ LEFT CURLY BRACKET }:
    \pP \p{Ps}
    All Any ASCII Assigned Bidi_M Bidi_Mirrored BidiM Common Zyyy Ps P Gr_Base Grapheme_Base Graph GrBase Open_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+007D ‹}› \N{ RIGHT CURLY BRACKET }:
    \pP \p{Pe}
    All Any ASCII Assigned Bidi_M Bidi_Mirrored BidiM Close_Punctuation Pe Common Zyyy P Gr_Base Grapheme_Base Graph GrBase Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+003D ‹=› \N{ EQUALS SIGN }:
    \pS \p{Sm}
    All Any ASCII Assigned Common Zyyy Sm S Gr_Base Grapheme_Base Graph GrBase Math Math_Symbol Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Symbol XPosixGraph XPosixPrint XPosixPunct
U+005F ‹_› \N{ LOW LINE }:
    \w \pP \p{Pc}
    All Any ASCII Assigned Common Zyyy Connector_Punctuation Pc P Gr_Base Grapheme_Base Graph GrBase ID_Continue IDC Punct PerlWord PosixGraph PosixPrint PosixPunct PosixWord Print Punctuation Word XID_Continue XIDC XPosixGraph XPosixPrint XPosixPunct XPosixWord
U+0060 ‹`› \N{ GRAVE ACCENT }:
    \pS \p{Sk}
    All Any ASCII Assigned Case_Ignorable CI Common Zyyy Dia Diacritic Sk S Gr_Base Grapheme_Base Graph GrBase Modifier_Symbol Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Symbol XPosixGraph XPosixPrint XPosixPunct
U+007E ‹~› \N{ TILDE }:
    \pS \p{Sm}
    All Any ASCII Assigned Common Zyyy Sm S Gr_Base Grapheme_Base Graph GrBase Math Math_Symbol Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Symbol XPosixGraph XPosixPrint XPosixPunct
U+0028 ‹(› \N{ LEFT PARENTHESIS }:
    \pP \p{Ps}
    All Any ASCII Assigned Bidi_M Bidi_Mirrored BidiM Common Zyyy Ps P Gr_Base Grapheme_Base Graph GrBase Open_Punctuation Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct
U+0029 ‹)› \N{ RIGHT PARENTHESIS }:
    \pP \p{Pe}
    All Any ASCII Assigned Bidi_M Bidi_Mirrored BidiM Close_Punctuation Pe Common Zyyy P Gr_Base Grapheme_Base Graph GrBase Punct Pat_Syn Pattern_Syntax PatSyn PosixGraph PosixPrint PosixPunct Print Punctuation XPosixGraph XPosixPrint XPosixPunct