如何在Android Studio中使用regex从给定的url中提取子字符串

implementation 'org.apache.commons:commons-lang3:3.12.0'

import org.apache.commons.lang3.StringUtils;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public String extractSubstringFromURL(String url, String regexPattern) {
    Pattern pattern = Pattern.compile(regexPattern);
    Matcher matcher = pattern.matcher(url);
    if (matcher.find()) {
        return StringUtils.substring(matcher.group(), 1);
    }
    return null;
}

String url = "https://www.example.com/subpage";
String regexPattern = "(?<=://)(.*?)(?=/)";
String extractedString = extractSubstringFromURL(url, regexPattern);