在javascript中:

mydata.match(/'([^']+)'/)[1]

实际的regexp是:/'([^']+)'/

如果你使用非贪婪修饰符(另一篇文章)，它是这样的:

mydata.match(/'(.*?)'/)[1]

它更干净。

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Test {
    public static void main(String[] args) {
        Pattern pattern = Pattern.compile(".*'([^']*)'.*");
        String mydata = "some string with 'the data i want' inside";

        Matcher matcher = pattern.matcher(mydata);
        if(matcher.matches()) {
            System.out.println(matcher.group(1));
        }

    }
}

假设你想要单引号之间的部分，使用一个Matcher正则表达式:

"'(.*?)'"

例子:

String mydata = "some string with 'the data i want' inside";
Pattern pattern = Pattern.compile("'(.*?)'");
Matcher matcher = pattern.matcher(mydata);
if (matcher.find())
{
    System.out.println(matcher.group(1));
}

结果:

the data i want

在pom.xml中添加apache.commons依赖项

<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-io</artifactId>
    <version>1.3.2</version>
</dependency>

下面的代码可以工作。

StringUtils.substringBetween(String mydata, String "'", String "'")

在Scala中,

val ticks = "'([^']*)'".r

ticks findFirstIn mydata match {
    case Some(ticks(inside)) => println(inside)
    case _ => println("nothing")
}

for (ticks(inside) <- ticks findAllIn mydata) println(inside) // multiple matches

val Some(ticks(inside)) = ticks findFirstIn mydata // may throw exception

val ticks = ".*'([^']*)'.*".r    
val ticks(inside) = mydata // safe, shorter, only gets the first set of ticks

这群人对我不起作用。我使用group(0)来查找url版本。

Pattern urlVersionPattern = Pattern.compile("\\/v[0-9][a-z]{0,1}\\/");
Matcher m = urlVersionPattern.matcher(url);
if (m.find()) { 
    return StringUtils.substringBetween(m.group(0), "/", "/");
}
return "v0";