SQL異常：java.sql.SQLException中：參數指標超出範圍（1>參數的數量，這是0）

Question

try { 
    Class.forName("com.mysql.jdbc.Driver"); 
    String connectionUrl = "jdbc:mysql://Localhost/basic_credit? autoReconnect=true&useSSL=false" ; 

    Connection con = DriverManager.getConnection(connectionUrl,"root","superchan009"); 
    String sql="INSERT INTO new_table(date, time, customer_name, address, contact#1, contact#2, item_name, final_price, downpayment, remaining_balance, length_ofinstallment, payment_permonth, first_due, last_due)VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"; 
    PreparedStatement ps=con.prepareStatement(sql); 

    ps.setString(1,jLabel16.getText()); 
    ps.setString(2,jLabel17.getText()); 
    ps.setString(3,tf1.getText()); 
    ps.setString(4,tf2.getText()); 
    ps.setString(5,tf3.getText()); 
    ps.setString(6,tf4.getText()); 
    ps.setString(7,tf6.getText()); 
    ps.setString(8,tf7.getText()); 
    ps.setString(9,tf8.getText()); 
    ps.setString(10,tf9.getText()); 
    ps.setString(11,tf10.getText()); 
    ps.setString(12,tf11.getText()); 
    ps.setString(13,tf12.getText()); 
    ps.setString(14,tf13.getText()); 

    ps.executeUpdate(); 
    JOptionPane.showMessageDialog(null,"DATA SAVED! THANK YOU!"); 

} catch (SQLException e) { 
    System.out.println("SQL Exception: "+ e.toString()); 
} catch (ClassNotFoundException cE) { 
    System.out.println("Class Not Found Exception: "+ cE.toString()); 
} 

Answer 1

您在列名中使用#創造問題......你應該從刪除#標籤列名稱並將其更正到數據庫中。

Answer 2

try { 
    Class.forName("com.mysql.jdbc.Driver"); 
    String connectionUrl = "jdbc:mysql://Localhost/basic_credit? autoReconnect=true&useSSL=false" ; 

    Connection con = DriverManager.getConnection(connectionUrl,"root","superchan009"); 
    String sql="INSERT INTO new_table(date, time, client_name, address, contact1, contact2, item_name, final_price, downpayment, remaining_balance, length_ofinstallment, payment_permonth, first_due, last_due) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"; 
    PreparedStatement ps=con.prepareStatement(sql); 

    ps.setString(1,jLabel16.getText()); 
    ps.setString(2,jLabel17.getText()); 
    ps.setString(3,tf1.getText()); 
    ps.setString(4,tf2.getText()); 
    ps.setString(5,tf3.getText()); 
    ps.setString(6,tf4.getText()); 
    ps.setString(7,tf6.getText()); 
    ps.setString(8,tf7.getText()); 
    ps.setString(9,tf8.getText()); 
    ps.setString(10,tf9.getText()); 
    ps.setString(11,tf10.getText()); 
    ps.setString(12,tf11.getText()); 
    ps.setString(13,tf12.getText()); 
    ps.setString(14,tf13.getText()); 

    ps.executeUpdate(); 
    JOptionPane.showMessageDialog(null,"DATA SAVED! THANK YOU!"); 

} catch (SQLException e) { 
    System.out.println("SQL Exception: "+ e.toString()); 
} catch (ClassNotFoundException cE) { 
    System.out.println("Class Not Found Exception: "+ cE.toString()); 
} 

如果您打算爲列名使用特殊字符「＃」，則SQL與JAVA連接區分大小寫。