Java 使用来自JTable的输入更新MySQL无效

这是在phpmyadmin中运行并更新我的数据库的代码：

 for (int i=0; i<rowno; i++){
            Object obj1 = orders.getModel().getValueAt(i,0);
            String itm = obj1.toString();
            System.out.println(itm);
            Object obj2 = orders.getModel().getValueAt(i, 1);
            String qty = obj2.toString();
            System.out.println(qty);
            Object obj3 = orders.getModel().getValueAt(i, 2);
            String rt = obj3.toString();
            System.out.println(rt);
            Object obj4 = orders.getModel().getValueAt(i, 3);
            String total = obj4.toString();
            System.out.println(total);
            Query("INSERT INTO Detail (OrderNumber, Items, Quantity, Rate, Total) VALUES ("+orderno.getText()+",'Item',"+qty+","+rt+","+total+")");
     }

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for（int i=0；i这个页面实际上帮助我解决了这个问题：

问题在于，与我在表中插入的其他数据不同，Item是惟一的VARCHAR。
因此，表示单引号的字符串顺序如下：

查询（“插入详细信息（订单号、项目、数量、费率、总计）值（“+orderno.getText（）+”、“+itm+”、“+qty+”、“+rt+”、“+Total+”））

for (int i=0; i<rowno; i++){
            Object obj1 = orders.getModel().getValueAt(i,0);
            String itm = obj1.toString();
            System.out.println(itm);
            Object obj2 = orders.getModel().getValueAt(i, 1);
            String qty = obj2.toString();
            System.out.println(qty);
            Object obj3 = orders.getModel().getValueAt(i, 2);
            String rt = obj3.toString();
            System.out.println(rt);
            Object obj4 = orders.getModel().getValueAt(i, 3);
            String total = obj4.toString();
            System.out.println(total);
            Query("INSERT INTO Detail (OrderNumber, Items, Quantity, Rate, Total) VALUES ("+orderno.getText()+","+itm+","+qty+","+rt+","+total+")");

     }