尝试与正则表达式匹配时出现 java.util.regex.PatternSyntaxException

Question

当我尝试执行以下代码时

text.matches("[a-zA-Z0-9 !\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~]");

我遇到异常

Exception in thread "main" java.util.regex.PatternSyntaxException: Unclosed character class near index 43
[a-zA-Z0-9 !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~]
                                           ^
    at java.util.regex.Pattern.error(Unknown Source)
    at java.util.regex.Pattern.clazz(Unknown Source)
    at java.util.regex.Pattern.sequence(Unknown Source)
    at java.util.regex.Pattern.expr(Unknown Source)
    at java.util.regex.Pattern.compile(Unknown Source)
    at java.util.regex.Pattern.<init>(Unknown Source)
    at java.util.regex.Pattern.compile(Unknown Source)
    at java.util.regex.Pattern.matches(Unknown Source)
    at java.lang.String.matches(Unknown Source)
    at test.G3Utils.checkIsAttribANS(G3Utils.java:47)
    at test.G3Utils.main(G3Utils.java:6)

请帮我解决这个问题

Answer 1

您需要转义 [ 字符，就像转义 ] 字符一样。

所以你的正则表达式的固定版本是:

[a-zA-Z0-9 !\"#$%&'()*+,-./:;<=>?@\\[\\]^_`{|}~]