框起来的地方为啥报错？

框起来的地方为啥报错？

完整代码：

public class PSCURDPart extends BaseDao{

    @Test
    public void testInsert() throws ClassNotFoundException, SQLException {
        String sql = "insert into employee(id, salary) values(?, ?);";

        int rows = executeUpdate(sql, 1, 111);
    }
}

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.List;
import java.util.Objects;

public class BaseDao {
    public int executeUpdate(String sql, Objects... params) throws Exception {//可变参数必须存在于形参列表的最后一位
        Connection connection = JdbcUtilsV2.getConnection();

        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        for (int i = 1; i <= params.length; i++) {
            preparedStatement.setObject(i, params[i]);
        }

        int rows = preparedStatement.executeUpdate();

        preparedStatement.close();
        if (connection.getAutoCommit()) {
            JdbcUtilsV2.freeConnection();
        }

        return rows;
    }
}