java - 正则表达式:如何删除由某些字符限制的子字符串？

Question

我不确定合适的正则表达式是什么:

String s = "[Don't remove] Don't remove [Remove | Don't remove]";

我想删除 [ 和 | 之间的所有内容但不是[和]。所以输出是:

"[Don't remove] Don't remove Don't remove]"

我尝试这样做，

s = s.replaceAll("\\[.*?\\|", "");

但我最终得到了这样的东西。

"Don't remove]"

现在我迷路了。我对正则表达式仍然很陌生，任何帮助将不胜感激。谢谢!

Answer 1

使用 ngated 字符类 [^\[|]*不允许匹配任何其他 [和|之间[和| :

String s = "[Don't remove] Don't remove [Remove | Don't remove]";
s = s.replaceAll("\\[[^\\[|]*\\|", "");
System.out.println(s); // => [Don't remove] Don't remove  Don't remove]

查看regex demo和一个online Java demo .

详细信息

• \\[ - 字面量 [
• [^\\[|]* -一个negated character class匹配除 [ 之外的任何 0+ 个字符和|
• \\| - 字面量 |符号。