Question

class runner extends TimerTask {
   public void run() {
        getQuantityStatus();
        //checkProdExpiry();
        //checkRawExpiry();
        //getCountNotify();

   }
}

public dashboard() {
  Timer t1 = new Timer();
  t1.schedule(new runner(), 5,10000);
}


public void getQuantityStatus() {

    int countAll = 0;
    int countRead = 0;

    query1 = "select * from stockProduct";
    query5 = " select count(*) from notify_prod where prodID = '"+ID+"' AND location = '"+location+"' AND type is NULL";
    query6 = " select count(*) from notify_prod where prodID = '"+ID+"' AND location = '"+location+"' AND status = 'read' AND type is NULL";

    try {

        stmt1 = conn.createStatement();
        rs1 = stmt1.executeQuery(query1);
        while(rs1.next()) {
            ID = rs1.getString("prodID");
            location = rs1.getString("location");
            qty = rs1.getString("avl_qty");



                        stmt5 = conn.createStatement();
                        rs5 = stmt5 .executeQuery(query5);
                        while(rs5.next()) {
                            countAll = rs5.getInt("count(*)");
                        }

                        stmt6 = conn.createStatement();
                        rs6 = stmt6.executeQuery(query6);
                        while(rs6.next()) {
                            countRead = rs6.getInt("count(*)");
                        }

                        if(countAll == countRead) {
                            stmt3 = conn.createStatement();
                            if(stmt3.executeUpdate(query3) == 1) {

                                //JOptionPane.showMessageDialog(null, "Stock for Product ID " + ID + " at Location - " + location.toUpperCase() + " is currently getting low.", "Warning", JOptionPane.WARNING_MESSAGE);
                                JOptionPane.showMessageDialog(null, countAll , "Warning", JOptionPane.WARNING_MESSAGE);
                                JOptionPane.showMessageDialog(null, countRead , "Warning", JOptionPane.WARNING_MESSAGE);
                            }
                        }

            //if(Integer.parseInt(qty) <= 20) {





            //}


        }


    }
    catch (SQLException ex) {
        JOptionPane.showMessageDialog(null, "Something went wrong", "Error", JOptionPane.ERROR_MESSAGE);
        ex.printStackTrace();
    } 

    catch (Exception ex) {
        ex.printStackTrace();
    } 
}
   }

在我的数据库中，我有2个表，分别称为“ notifyProd”表和“ stockProd”。因此，我要做的是从stockProd表中检查所有内容，并在获取“ prodID”和“ location”的同时，在“ notifyProd”内部检查表中是否存在“ ID”和“位置”。

getQuantityStatus函数在计时器内部运行，该计时器计划每5秒执行一次。目前，根据给定的ID和位置，notifyProd表中还存在2条记录。所以我的问题是，当我执行代码时，在第一次尝试中，它为变量“ countAll”和“ countRead”提供了0和0，然后在5秒钟后为变量'2和0提供了正确的值。 countAll”和“ countRead”。我不知道为什么。 “ Query5”获取特定ID和位置的所有记录中的No，“ Query6”获取对给定ID和位置的所有读取记录。构造函数是dashboard（），并在其中调用了计时器。

总是在第一时间给出值0

0 个答案: