ResultSet rsOrders = stmt2.executeQuery(ordersquery);
stmt2是您的SQL查询，然后为什么要传递ordersquery将代码更改为以下代码
ResultSet rsOrders = stmt2.executeQuery();解决方法
我正在使用Java和建立库存系统JDBC。查询表时出现此错误。
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：SQL语法有错误；检查与您的MariaDB服务器版本相对应的手册，以获取在’？’附近使用的正确语法。在第1行
下面是代码
public static void SearchUser() throws SQLException{ String ordersquery = 'SELECT * FROM orders WHERE submittedBy = ?'; User userDetails = UserController.getUserDetails(username);//gets the details from user tables if (userDetails != null){ System.out.println('----Menu----');System.out.println();System.out.println('1. View Orders Made By This User');System.out.println('2. View Most Expensive Parts Currently Taken Out By This User');System.out.println();System.out.println('9. Go Back To Main Menu');choice = input.nextLine(); if (choice.equals('1')){ try ( PreparedStatement stmt2 = conn.prepareStatement(ordersquery); ){ stmt2.setInt(1,userDetails.getUserId());ResultSet rsOrders = stmt2.executeQuery(ordersquery); if (rsOrders != null){ while (rsOrders.next()){Order orderDetails = new Order(rsOrders.getInt('orderId'),userDetails.getUserId(),rsOrders.getInt('totalItems'),rsOrders.getInt('totalPrice'));System.out.println('-------------------------------------');Order.print(orderDetails); }} }catch (SQLException e){System.err.println(e); }}else if (choice.equals('2')){ } }}
