如何在Java或Clojure中用正则表达式替换字符串

Question

我有一些像这样的字符串：

"this is a string like #{aa} and#{bb}. "
"#{cc}this is another str#{dd}ing..."

我想像这样更改这些字符串：

"this is a string like ? and?." "aa" "bb"
"?this is another str?ing..." "cc" "dd"

我尝试使用正则表达式来拆分这些字符串并失败。

我该怎么办？

Answer 1

您可以使用如下正则表达式替换字符串：

#\{(.*?)\}

<强> Working demo

然后你必须从捕获组中获取内容并将其连接到你的字符串。我为你留下了逻辑：）

Answer 2

您可以尝试这样：

final String regex = "#\\{(.*?)\\}";
final String string = "ere is some string #{sx} and #{sy}.";
final String subst = "?";

final Pattern pattern = Pattern.compile(regex);
final Matcher matcher = pattern.matcher(string);

while (matcher.find()) {
    System.out.print(matcher.group(1) + " ");
}

final String result = matcher.replaceAll(subst);
System.out.println(result);