将数据从resultSet检索到文本字段中

时间:2016-12-15 18:18:52

标签: java sql database user-interface rmi

所以我有一个带字符串参数的字符串方法。我试图通过文本字段(简单部分)将字符串传递给方法,并对该传递的参数执行SQL查询。它是一个RMI应用程序,这个方法的工作是检索有关项目的详细信息。

public String SearchItem(String item) throws RemoteException {

    String olo1 = "Select * from StockTB where ItemName ='" + item + "';";
    ArrayList<String> a = new ArrayList<String>();

    try{
        Statement statement = link.createStatement();
        ResultSet results = statement.executeQuery(olo1);

        while(results.next()){
            System.out.println("Item_ID:" + results.getInt(1));
            System.out.println("Item Name:" + results.getString(2));
            System.out.println("Description:" + results.getString(3));
            System.out.println("Price:" + results.getString(4));
            System.out.println("Stock Amount:" + results.getString(5));
            System.out.println("Item found!");
            return("Item found!");
        }
    }
    catch(Exception e){
        System.out.println("Error: Error retrieving data!");
        e.printStackTrace();
        System.exit(1);
    }
    try {
        link.close();
    }
    catch(SQLException e1){
        System.out.print("Error: Unable to disconnect!");
        e1.printStackTrace();
    }
    System.out.println("Item not found!");
    return("Not found");
}

这是我在另一个班级的按钮代码。

JButton btnSearch = new JButton("Search");
btnSearch.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        try{
            Registry reg = LocateRegistry.getRegistry("192.168.0.10",1099);
            db123 = (DBService)Naming.lookup("rmi://localhost/DBService");
            String tt2 = db123.SearchItem(textField1.getText());

            if(tt2 != null){
                //tt2.
            }
            else{
                JOptionPane.showMessageDialog(null,textField1.getText() +  " Item not found! Please search for another item.");
            }   
        }
        catch(Exception e1){
            JOptionPane.showMessageDialog(null, e1);
        }
    }
});

我要做的是通过GUI中的第一个文本字段输入项目,并将结果返回到后续的文本字段中。我很难过。我一直在看resultSet对象,但无法搞清楚。只是想获得想法。

GUI

0 个答案:

没有答案