MySQL结果集 - 没有为参数1指定值

Question

我无法弄清楚这个错误意味着什么或如何解决它.我正在尝试从我的一个数据库中检索一些数据但是仍然遇到以下错误消息.

preparedStatement = connect
            .prepareStatement("SELECT * FROM mydatabase "
                        + " WHERE TickerID=?");
            resultSet = preparedStatement.executeQuery(); //where it says the error is, line 132
            while(resultSet.next())
            {
                aIDTA = resultSet.getInt("AccountID");
                nameTA = resultSet.getString("Name");
                CashBalance = resultSet.getDouble("CashBalance");
                TradeFeeBuy = resultSet.getDouble("TradeFeeBuy");
                TradeFeeSell = resultSet.getDouble("TradeFeeSell");
                AssetsBalance = resultSet.getDouble("AssetsBalance");
            }



Exception in thread "main" java.sql.SQLException: No value specified for parameter 1
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:996)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:935)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:924)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:870)
    at com.mysql.jdbc.PreparedStatement.checkAllParametersSet(PreparedStatement.java:2281)
    at com.mysql.jdbc.PreparedStatement.fillSendPacket(PreparedStatement.java:2261)
    at com.mysql.jdbc.PreparedStatement.fillSendPacket(PreparedStatement.java:2191)
    at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2004)
    at BuyAndSell.BuyAndSell(BuyAndSell.java:132)
    at Main.main(Main.java:21)

Answer 1

你需要填写参数 PreparedStatement

preparedStatement.setLong(1, someIdentifier)