使用Java regexp进行字符串操作

public static boolean matches(String regex, String input) {
    return Pattern.matches(regex, input);
}

public static String replaceAll(String regex, String input, String replacement) {
    return input.replaceAll(regex, replacement);
}

public static String replaceFirst(String regex, String input, String replacement) {
    return input.replaceFirst(regex, replacement);
}

public static String[] split(String regex, String input) {
    return input.split(regex);
}

public static List<String> findAll(String regex, String input) {
    List<String> result = new ArrayList<>();
    Pattern pattern = Pattern.compile(regex);
    Matcher matcher = pattern.matcher(input);
    while (matcher.find()) {
        result.add(matcher.group());
    }
    return result;
}

public static String findFirst(String regex, String input) {
    Pattern pattern = Pattern.compile(regex);
    Matcher matcher = pattern.matcher(input);
    if (matcher.find()) {
        return matcher.group();
    } else {
        return null;
    }
}