无法使用executeQuery（）发出数据操作语句[重复]

Connection connection = null;
PreparedStatement preparedStatement = null;
ResultSet generatedKeys = null;

    try {        connection = m_Connection;        preparedStatement = (PreparedStatement) connection.prepareStatement(qString, Statement.RETURN_GENERATED_KEYS);        // ...        int affectedRows = preparedStatement.executeUpdate();        if (affectedRows == 0) { throw new SQLException("Creating user failed, no rows affected.");        }        generatedKeys = preparedStatement.getGeneratedKeys();        int id = -1;        if (generatedKeys.next()) { id = generatedKeys.getInt(1); id = -1;        } else { throw new SQLException("Creating user failed, no generated key obtained.");        }    } finally {    }