Java正则表达式高效处理多行文本技巧详解

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

public class MultiLineRegexExample {
    public static void main(String[] args) {
        String text = "This is the first line.\nThis is the second line.\nThis is the third line.";

        // 使用(?s)标志让.匹配任何字符，包括换行符
        String regex = "(?s)line";

        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(text);

        while (matcher.find()) {
            System.out.println("Found: " + matcher.group());
        }
    }
}

Found: This is the first line.
Found: This is the second line.
Found: This is the third line.