java.sql.SQLException：参数索引超出范围（1>参数数量，为0）。在使用PreparedStatement时

正如评论中提到的，您应该删除？中的引号。

另外，在中

rs.getString(i)

i

总结一下：

public ArrayList<String> findPath(String roomName) throws SQLException, IOException, InstantiationException, IllegalAccessException, ClassNotFoundException{    ArrayList<String> path = new ArrayList<String>();     connection = getConnection();    String queryPattern = "SELECt Livello_1, Livello_2, Livello_3, Livello_4 FROM Camera WHERe Camera.Nome = ?";    PreparedStatement queryStatement = connection.prepareStatement(queryPattern);    queryStatement.setString(1, roomName);    ResultSet rs = queryStatement.executeQuery();    if(rs.next())    {        for(int i = 1; i < 4; i++)        { path.add(rs.getString(i));        }    }    return path;}