在java中逐行读取文件并从List<List<String>>访问以下规范的值

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public List<List<String>> readFromFile(String filePath) {
    List<List<String>> data = new ArrayList<>();

    try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
        String line;
        while ((line = br.readLine()) != null) {
            List<String> row = new ArrayList<>();
            String[] values = line.split(",");
            for (String value : values) {
                row.add(value);
            }
            data.add(row);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

    return data;
}

String filePath = "path/to/your/file.txt";
List<List<String>> data = readFromFile(filePath);

// 访问特定行和列的值
String value = data.get(row).get(column);