Question

因此，这是一个实现搜索功能的程序。它运行得非常好。没有问题。我的要求是使搜索结果显示在同一页面下方。在这段代码中，我将结果显示在一个新的Jframe中，打开一个新窗口。我基本上不想要这个。我想让搜索结果出现在同一页面中。那么，我应该修改代码吗？任何形式的帮助表示赞赏。：）谢谢！

这是我的代码： -

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.sql.*;
import java.util.Vector;

import javax.swing.*;
import javax.swing.table.DefaultTableModel;

public class r_search_1 extends JFrame implements ActionListener {

    JFrame frame1;
    JLabel l0, l1, l2;
    JComboBox c1;
    JButton b1;
    Connection con;
    ResultSet rs, rs1;
    Statement st, st1;
    PreparedStatement pst;
    String ids;
    static JTable table;
    String[] columnNames = {"SECTION NAME", "REPORT NAME", "CONTACT", "LINK"};
    String from;
    Vector v = new Vector();

    r_search_1() 
    {
        l0 = new JLabel("Fetching Search Results...");
        l0.setForeground(Color.blue);
        l0.setFont(new Font("Serif", Font.BOLD, 20));
        l1 = new JLabel("Search");
        b1 = new JButton("submit");

        l0.setBounds(100, 50, 350, 40);
        l1.setBounds(75, 110, 75, 20);
        b1.setBounds(150, 150, 150, 20);
        b1.addActionListener(this);

        setTitle("Search Executive Reports  ");
        setLayout(null);
        //setVisible(true);
        setSize(500, 500);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        add(l0);
        add(l1);
        add(b1);

        try 
        {

            File dbFile = new File("executive_db.accdb");
            String path = dbFile.getAbsolutePath();
            con = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)}; DBQ= " + path);
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            st = con.createStatement();
            rs = st.executeQuery("select index_name from Index1");
           while (rs.next())
           {
                ids = rs.getString(1);
                v.add(ids);

            }
            c1 = new JComboBox(v);
            c1.setEditable(true);c1.setSelectedItem("");
            c1.setBounds(150, 110, 150, 20);

            add(c1);
            st.close();
            rs.close();
        } catch (Exception e) {
        }
        setVisible(true);
    }

    public void actionPerformed(ActionEvent ae) {
        if (ae.getSource() == b1) {
            showTableData();
        }
     }

    public void showTableData()
    {
        frame1 = new JFrame("Database Search Result");
        frame1.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame1.setLayout(new BorderLayout());
        DefaultTableModel model = new DefaultTableModel();
        model.setColumnIdentifiers(columnNames);
        table = new JTable();
        table.setModel(model);
        table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
        table.setFillsViewportHeight(true);
        JScrollPane scroll = new JScrollPane(table);
        scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        scroll.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
        from = (String) c1.getSelectedItem();

        String section_name = "";
        String report_name = "";
        String contact_name = "";
        String link = "";


        try
        {

        pst = con.prepareStatement("select distinct Section.Section_Name,Report.Report_Name,Report.Link,Contact.Contact_Name "
                        + "FROM (( Section INNER JOIN Report ON Report.Section_ID=Section.Section_ID ) INNER JOIN Contact ON Contact.Contact_ID=Report.Contact_ID )  LEFT JOIN Metrics ON Metrics.Report_ID=Report.Report_ID  "
                        + " WHERE Section.Section_Name LIKE '%"+from+"%' OR Report.Report_Name LIKE '%"+from+"%' OR Metrics.Metric_Name LIKE '%"+from+"%' OR Contact.Contact_Name LIKE '%"+from+"%' ");
            ResultSet rs = pst.executeQuery();
            int i = 0;
            while (rs.next()) {
                section_name = rs.getString("Section_Name");
                report_name = rs.getString("Report_Name");
                contact_name = rs.getString("Contact_Name");
                link = rs.getString("Link");
                model.addRow(new Object[]{section_name, report_name, contact_name, link});
                i++;
            }
            if (i < 1) {
                JOptionPane.showMessageDialog(null, "No Record Found", "Error", JOptionPane.ERROR_MESSAGE);
            }
            if (i == 1) {
                System.out.println(i + " Record Found");
            } else {
                System.out.println(i + " Records Found");
            }
        } catch (Exception ex) {
            JOptionPane.showMessageDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
        }
        frame1.add(scroll);
        frame1.setVisible(true);
        frame1.setSize(1000, 400);
    }

    public static void main(String args[]) {
        new r_search_1();
    }
}

Answer 1

不要使用Null布局 。使用 BorderLayout 。

您的所有搜索功能都应位于中心面板中。

add(mySearchPanel, BorderLayout.CENTER);

您的结果应该在南面板中。这样就不会缩小中心面板。

add(myResultsPanel, BorderLayout.SOUTH);

如果南面板上没有任何东西，那么它会缩小，看起来好像不在那里。

因此，更详细一点，您的 l0 ， l1 和 b1 组件应该进入一个面板（比如myTopPanel），并被添加到中心。您的滚动组件应添加到底部面板。

setTitle("Search Executive Reports  ");
setLayout(new BorderLayout());

myTopPanel.add(l0);
myTopPanel.add(l1);
myTopPanel.add(b1);


add(myTopPanel, BorderLayout.CENTER)

add(scroll, BorderLayout.CENTER)

使搜索结果出现在同一页面中（Swing程序）

这是我的代码： -

1 个答案: