如何在DataProvider中利用List<map>对象中的excel数据？

import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import java.util.List;
import java.util.Map;

public class ExcelDataProviderTest {

    @DataProvider(name = "excelData")
    public Object[][] provideExcelData() {
        // 将Excel数据读取到List<Map>对象中
        List<Map<String, String>> excelData = ExcelReader.readExcelData("path/to/excel");

        // 将List<Map>对象转换为Object[][]数组
        Object[][] data = new Object[excelData.size()][1];
        for (int i = 0; i < excelData.size(); i++) {
            data[i][0] = excelData.get(i);
        }

        return data;
    }

    @Test(dataProvider = "excelData")
    public void testExcelData(Map<String, String> rowData) {
        // 从接收到的数据中提取所需字段值
        String username = rowData.get("username");
        String password = rowData.get("password");

        // 进行相应的测试操作
        // ...
    }
}