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我计划使用雅虎财务csv api生成网址,以获得股票实时价格和时间.该网址如下http://download.finance.yahoo.com/d/quotes.csvs=%40%5YHOO,GOOG,MSFT,BAC&f=nsl1o&e=.csv,它返回一个包含4列的表格.

我使用jdbc将数据存储到Mysql,但始终存在错误:"没有为参数5指定值".代码如下:public class Quote_Saver {private void connection(){try {Class.forName("com.mysql.jdbc.Driver"); } catch(ClassNotFoundException e){e.printStackTrace(); }}

private String retrieveQuote() {
    StringBuffer buf = new StringBuffer();
    try {
        URL page = new URL("http://download.finance.yahoo.com/d/quotes.csv?s=%40%5YHOO,GOOG,MSFT,BAC&f=nsl1o&e=.csv");
        String line;
        URLConnection conn = page.openConnection();
        conn.connect();
        InputStreamReader in = new InputStreamReader(conn.getInputStream());
        BufferedReader data = new BufferedReader(in);
        while ((line = data.readLine()) != null) {
            buf.append(line + "\n");
        }
    } catch (MalformedURLException mue) {
        System.out.println("Bad URL: " + mue.getMessage());
    } catch (IOException ioe) {
        System.out.println("IO Error:" + ioe.getMessage());
    }
    return …