MySQL结果集 - 没有为参数1指定值

时间:2015-01-06 21:46:01

标签: java jdbc

我无法弄清楚此错误的含义或解决方法。我试图从我的一个数据库中检索一些数据,但仍然遇到以下错误信息。

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)

2 个答案:

答案 0 :(得分:7)

您需要填写PreparedStatement

中的参数
preparedStatement.setLong(1, someIdentifier)

答案 1 :(得分:2)

可能是因为您没有为您的请求设置参数:

SELECT * FROM mydatabase WHERE TickerID= ?

你必须添加:

preparedStatement.setString(1, "youUserIdValue");

在执行查询之前。

您还可以使用命名参数:

preparedStatement = connect
        .prepareStatement("SELECT * FROM mydatabase "
                    + " WHERE TickerID=:userID");
preparedStatement.setString("userID", "youUserIdValue");