Question

问题：如何根据表格中选定的原始付款记录获取最新的付款状态

情景：我目前关注的计划部分是关于客户付款余额的管理。

当我选择原始付款信息的特定记录时，我正在处理的程序正在挂起，并且所选记录通过特定MySQL表installation_sales中的外键引导一系列记录。 ref_isales_id（引用同一表isales_id中主键installation_sales的外键。

因此，这是一个包含客户付款的表格，其中特定客户的原始付款记录是与同一客户即将付款（即余额付款）的模式的第一部分。

注意：所有变量都已分配，无论是否在代码块中。

守则：

private void manageBalancesTableMouseClicked(java.awt.event.MouseEvent evt) {                                                 
    payBtn.setEnabled(true);
    historyBtn.setEnabled(true);
    try{
        int row = manageBalancesTable.getSelectedRow();
        clickedTable = (manageBalancesTable.getModel().getValueAt(row, 0).toString());
        conn = MySQLConnect.ConnectDB();
        st = conn.createStatement();
        rs = st.executeQuery("select isales_id,rce,total_payment,pay_status,pay_amount,remaining_bal,it_id,client_id,ic_id,ref_isales_id from installation_sales where (isales_id='"+clickedTable+"' or ref_isales_id='"+clickedTable+"') and pay_status!='full payment' order by isales_id desc limit 1");

        if(rs.next()) {
            isales_id=rs.getString("isales_id");
            rce=rs.getString("rce");
            total_payment=rs.getDouble("total_payment");
            pay_status=rs.getString("pay_status");
            pay_amount1=rs.getDouble("pay_amount");
            remaining_bal=rs.getDouble("remaining_bal");
            it_id=rs.getInt("it_id");
            client_id=rs.getString("client_id");
            ic_id=rs.getString("ic_id");
            ref_isales_id=rs.getString("ref_isales_id");
        }
        /* When I insert this while looping part in the code, the program lags when I run it. */
        while (!"0".equals(ref_isales_id)) {
            st2 = conn.createStatement();
            rs2 = st2.executeQuery("select isales_id,rce,total_payment,pay_status,pay_amount,remaining_bal,it_id,client_id,ic_id,ref_isales_id from installation_sales where ref_isales_id='"+isales_id+"' and pay_status!='full payment'  order by isales_id desc limit 1");
            if(rs2.next()) {
                isales_id=rs.getString("isales_id");
                rce=rs.getString("rce");
                total_payment=rs.getDouble("total_payment");
                pay_status=rs.getString("pay_status");
                pay_amount1=rs.getDouble("pay_amount");
                remaining_bal=rs.getDouble("remaining_bal");
                it_id=rs.getInt("it_id");
                client_id=rs.getString("client_id");
                ic_id=rs.getString("ic_id");
                ref_isales_id=rs.getString("ref_isales_id");
            }
        }
    } catch (Exception e) {
    } finally {
        try {
            conn.close();
        } catch (SQLException ex) {
            Logger.getLogger(ManageBalancesPanel.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
    if(null!=pay_status) switch (pay_status) {
        case "reservation fee":
            paymentStatusComboBox.removeAllItems();
            paymentStatusComboBox.addItem("select payment status...");
            paymentStatusComboBox.addItem("down payment");
            paymentAmountTextField.setText("");
            break;
        case "down payment":
            paymentStatusComboBox.removeAllItems();
            paymentStatusComboBox.addItem("select payment status...");
            paymentStatusComboBox.addItem("installment");
            paymentStatusComboBox.addItem("full payment");
            paymentAmountTextField.setText("");
            break;
        case "installment":
            paymentStatusComboBox.removeAllItems();
            paymentStatusComboBox.addItem("select payment status...");
            paymentStatusComboBox.addItem("installment");
            paymentStatusComboBox.addItem("full payment");
            paymentAmountTextField.setText("");
            break;
        default:
            break;
    }
}

这是我第一次来到这里，任何帮助都将受到高度赞赏！

Answer 1

我的猜测是

rs2 = st2.executeQuery(...)

在你的while循环中，你总是得到相同的响应，只查看返回的第一个条目。所以你总是这样说：给我[1,2,3,4]，看[1]，再询问[1,2,3,4]然后再看[1]，因为无穷大因为ref_isales_id = [1] .ref_isales_id并且永远不会满足你的while循环的条件。

Answer 2

我已经解决了！

private void manageBalancesTableMouseClicked(java.awt.event.MouseEvent evt) {                                                 
    payBtn.setEnabled(true);
    historyBtn.setEnabled(true);
    try{
        int row = manageBalancesTable.getSelectedRow();
        clickedTable = (manageBalancesTable.getModel().getValueAt(row, 0).toString());
        conn = MySQLConnect.ConnectDB();
        st = conn.createStatement();
        rs = st.executeQuery("select isales_id,rce,total_payment,pay_status,pay_amount,remaining_bal,it_id,client_id,ic_id,ref_isales_id from installation_sales where (isales_id='"+clickedTable+"' or ref_isales_id='"+clickedTable+"') and pay_status!='full payment' order by isales_id desc limit 1");

        if(rs.next()) {
            isales_id=rs.getString("isales_id");
            rce=rs.getString("rce");
            total_payment=rs.getDouble("total_payment");
            pay_status=rs.getString("pay_status");
            pay_amount1=rs.getDouble("pay_amount");
            remaining_bal=rs.getDouble("remaining_bal");
            it_id=rs.getInt("it_id");
            client_id=rs.getString("client_id");
            ic_id=rs.getString("ic_id");
            ref_isales_id=rs.getString("ref_isales_id");
        }

        while (!"0".equals(ref_isales_id)) {
            st2 = conn.createStatement();
            rs2 = st2.executeQuery("select isales_id,rce,total_payment,pay_status,pay_amount,remaining_bal,it_id,client_id,ic_id,ref_isales_id from installation_sales where ref_isales_id='"+isales_id+"' and pay_status!='full payment'  order by isales_id desc limit 1");
            if(rs2.next()) {
                isales_id=rs2.getString("isales_id");
                rce=rs2.getString("rce");
                total_payment=rs2.getDouble("total_payment");
                pay_status=rs2.getString("pay_status");
                pay_amount1=rs2.getDouble("pay_amount");
                remaining_bal=rs2.getDouble("remaining_bal");
                it_id=rs2.getInt("it_id");
                client_id=rs2.getString("client_id");
                ic_id=rs2.getString("ic_id");
                ref_isales_id=rs2.getString("ref_isales_id");
            } else {
                break;
            }
        }
    } catch (Exception e) {
    } finally {
        try {
            conn.close();
        } catch (SQLException ex) {
            Logger.getLogger(ManageBalancesPanel.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    if(null!=pay_status) switch (pay_status) {
        case "reservation fee":
            paymentStatusComboBox.removeAllItems();
            paymentStatusComboBox.addItem("select payment status...");
            paymentStatusComboBox.addItem("down payment");
            paymentAmountTextField.setText("");
            break;
        case "down payment":
            paymentStatusComboBox.removeAllItems();
            paymentStatusComboBox.addItem("select payment status...");
            paymentStatusComboBox.addItem("installment");
            paymentStatusComboBox.addItem("full payment");
            paymentAmountTextField.setText("");
            break;
        case "installment":
            paymentStatusComboBox.removeAllItems();
            paymentStatusComboBox.addItem("select payment status...");
            paymentStatusComboBox.addItem("installment");
            paymentStatusComboBox.addItem("full payment");
            paymentAmountTextField.setText("");
            break;
        default:
            break;
    }
}

如何根据表格中选定的原始付款记录获取最新的付款状态

2 个答案: