如何将文件传递到Java Matcher中？

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class FileMatcherExample {
    public static void main(String[] args) {
        // 正则表达式模式
        String regex = "your_regex_pattern_here";
        Pattern pattern = Pattern.compile(regex);

        // 文件路径
        String filePath = "path_to_your_file.txt";

        try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
            StringBuilder fileContent = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                fileContent.append(line).append("\n");
            }

            // 创建Matcher对象
            Matcher matcher = pattern.matcher(fileContent.toString());

            // 使用Matcher进行匹配操作
            while (matcher.find()) {
                System.out.println("找到匹配项: " + matcher.group());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}