如何在Java中使用BufferedReader在.txt文件中查找特定字符串

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class FileSearch {
    public static void main(String[] args) {
        String filePath = "path/to/your/file.txt";
        String searchString = "your search string";

        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
            String line;
            int lineNumber = 1;
            while ((line = br.readLine()) != null) {
                if (line.contains(searchString)) {
                    System.out.println("Found at line " + lineNumber + ": " + line);
                }
                lineNumber++;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}