I have a java program, and in one part of my code I have to read a string like this, ^s(group1) ^s(group2) and then return the strings "group1" and "group2" so I used this regexp \^s\(.*\) but it returns the whole string.
我有一个java程序，在我的代码的一部分我必须读取这样的字符串，^ s（group1）^ s（group2）然后返回字符串“group1”和“group2”所以我使用这个正则表达式\ ^ s \（。* \）但它返回整个字符串。
What's wrong?
怎么了？
2 个解决方案
#1
1
.* matches ) so the match doesn't stop at the close parenthesis. Try [^\)]* instead, or [^\(\)]* if you want a bit of extra insurance against nested parenthetical groups.
。*匹配）所以匹配不会在闭括号处停止。如果你想对嵌套的括号组进行一些额外保险，请尝试[^ \]] *或[^ \（\）] *。
You could also look into using a non-greedy modifier, .*?, which would also solve the problem. Some find that more readable than a negated charset match.
您还可以考虑使用非贪婪的修饰符。* ?,这也可以解决问题。有些人发现它比可否定的charset匹配更具可读性。
#2
0
You can extract those words with groups.
您可以使用组提取这些单词。
\^s\((.*?)\)
\ 2 -S \（（。*？）\）
This says to capture anything in between ^s() and can be used like this.
这表示捕获^ s（）之间的任何内容，并且可以像这样使用。
String str = "^s(group1) ^s(group2)";
Matcher m = Pattern.compile("\\^s\\((.*?)\\)").matcher(str);
while (m.find()) {
System.out.println(m.group(1));
}
Output
产量
group1
group2
#1
1
.* matches ) so the match doesn't stop at the close parenthesis. Try [^\)]* instead, or [^\(\)]* if you want a bit of extra insurance against nested parenthetical groups.
。*匹配）所以匹配不会在闭括号处停止。如果你想对嵌套的括号组进行一些额外保险，请尝试[^ \]] *或[^ \（\）] *。
You could also look into using a non-greedy modifier, .*?, which would also solve the problem. Some find that more readable than a negated charset match.
您还可以考虑使用非贪婪的修饰符。* ?,这也可以解决问题。有些人发现它比可否定的charset匹配更具可读性。
#2
0
You can extract those words with groups.
您可以使用组提取这些单词。
\^s\((.*?)\)
\ 2 -S \（（。*？）\）
This says to capture anything in between ^s() and can be used like this.
这表示捕获^ s（）之间的任何内容，并且可以像这样使用。
String str = "^s(group1) ^s(group2)";
Matcher m = Pattern.compile("\\^s\\((.*?)\\)").matcher(str);
while (m.find()) {
System.out.println(m.group(1));
}
Output
产量
group1
group2