如何在没有多个cfg.xml文件的情况下通过hibernate处理多个数据库(How to handle multiple database by hibernate without multiple cfg.xml files)

 这里有一些代码可以帮助您入门。 我把它全部放在一个类中，但你应该为大型JPanel和小型JPanels制作单独的类。 这使您可以为小型JPanels添加拖放逻辑。 
 
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Toolkit;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.Border;

public class TVGrid implements Runnable {

    protected static final Insets noInsets    = new Insets(0, 0, 0, 0);

    protected Dimension screenSize;

    protected JFrame frame;

    protected JPanel largePanel;
    protected JPanel mainPanel;

    protected JPanel[] smallPanels;

    protected Point[] smallPanelOrigins;

    public TVGrid() {
        this.smallPanels = new JPanel[7];
        setSmallPanelOrigins();
        this.screenSize = Toolkit.getDefaultToolkit().getScreenSize();      
    }

    protected void setSmallPanelOrigins() {
        this.smallPanelOrigins = new Point[7];
        this.smallPanelOrigins[0] = new Point(3, 0);
        this.smallPanelOrigins[1] = new Point(3, 1);
        this.smallPanelOrigins[2] = new Point(3, 2);
        this.smallPanelOrigins[3] = new Point(0, 3);
        this.smallPanelOrigins[4] = new Point(1, 3);
        this.smallPanelOrigins[5] = new Point(2, 3);
        this.smallPanelOrigins[6] = new Point(3, 3);
    }

    @Override
    public void run() {
        Border border = BorderFactory.createLineBorder(Color.BLACK, 3);

        frame = new JFrame();
        frame.setTitle("TV Frame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        mainPanel = new JPanel();
        mainPanel.setLayout(new GridBagLayout());

        largePanel = new JPanel();
        largePanel.setPreferredSize(getLargePanelPreferredSize());
        largePanel.setBackground(Color.GREEN);
        largePanel.setBorder(border);

        addComponent(mainPanel, largePanel, 0, 0, 3, 3, noInsets,
                GridBagConstraints.LINE_START, GridBagConstraints.BOTH);

        for (int i = 0; i < 7; i++) {
            smallPanels[i] = new JPanel();
            smallPanels[i].setPreferredSize(getSmallPanelPreferredSize());
            smallPanels[i].setBackground(Color.YELLOW);
            smallPanels[i].setBorder(border);

            int x = smallPanelOrigins[i].x;
            int y = smallPanelOrigins[i].y;

            addComponent(mainPanel, smallPanels[i], x, y, 1, 1, noInsets,
                    GridBagConstraints.LINE_START, GridBagConstraints.BOTH);
        }

        frame.add(mainPanel);
        frame.pack();
        frame.setVisible(true);
    }

    protected Dimension getLargePanelPreferredSize() {
        Dimension d = new Dimension();
        d.width = ((screenSize.width - 30) * 3) / 4;
        d.height = ((screenSize.height - 90) * 3) / 4;
        return d;
    }

    protected Dimension getSmallPanelPreferredSize() {
        Dimension d = new Dimension();
        d.width = (screenSize.width - 30) / 4;
        d.height = (screenSize.height - 90) / 4;
        return d;
    }

    protected void addComponent(Container container, Component component,
            int gridx, int gridy, int gridwidth, int gridheight, 
            Insets insets, int anchor, int fill) {
        GridBagConstraints gbc = new GridBagConstraints(gridx, gridy,
                gridwidth, gridheight, 1.0D, 1.0D, anchor, fill, insets, 0, 0);
        container.add(component, gbc);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new TVGrid());
    }


}

Here's some code to get you started. I put it all in one class, but you should make separate classes for the large JPanel and the small JPanels. This enables you to add the drag and drop logic for the small JPanels.
 
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Toolkit;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.Border;

public class TVGrid implements Runnable {

    protected static final Insets noInsets    = new Insets(0, 0, 0, 0);

    protected Dimension screenSize;

    protected JFrame frame;

    protected JPanel largePanel;
    protected JPanel mainPanel;

    protected JPanel[] smallPanels;

    protected Point[] smallPanelOrigins;

    public TVGrid() {
        this.smallPanels = new JPanel[7];
        setSmallPanelOrigins();
        this.screenSize = Toolkit.getDefaultToolkit().getScreenSize();      
    }

    protected void setSmallPanelOrigins() {
        this.smallPanelOrigins = new Point[7];
        this.smallPanelOrigins[0] = new Point(3, 0);
        this.smallPanelOrigins[1] = new Point(3, 1);
        this.smallPanelOrigins[2] = new Point(3, 2);
        this.smallPanelOrigins[3] = new Point(0, 3);
        this.smallPanelOrigins[4] = new Point(1, 3);
        this.smallPanelOrigins[5] = new Point(2, 3);
        this.smallPanelOrigins[6] = new Point(3, 3);
    }

    @Override
    public void run() {
        Border border = BorderFactory.createLineBorder(Color.BLACK, 3);

        frame = new JFrame();
        frame.setTitle("TV Frame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        mainPanel = new JPanel();
        mainPanel.setLayout(new GridBagLayout());

        largePanel = new JPanel();
        largePanel.setPreferredSize(getLargePanelPreferredSize());
        largePanel.setBackground(Color.GREEN);
        largePanel.setBorder(border);

        addComponent(mainPanel, largePanel, 0, 0, 3, 3, noInsets,
                GridBagConstraints.LINE_START, GridBagConstraints.BOTH);

        for (int i = 0; i < 7; i++) {
            smallPanels[i] = new JPanel();
            smallPanels[i].setPreferredSize(getSmallPanelPreferredSize());
            smallPanels[i].setBackground(Color.YELLOW);
            smallPanels[i].setBorder(border);

            int x = smallPanelOrigins[i].x;
            int y = smallPanelOrigins[i].y;

            addComponent(mainPanel, smallPanels[i], x, y, 1, 1, noInsets,
                    GridBagConstraints.LINE_START, GridBagConstraints.BOTH);
        }

        frame.add(mainPanel);
        frame.pack();
        frame.setVisible(true);
    }

    protected Dimension getLargePanelPreferredSize() {
        Dimension d = new Dimension();
        d.width = ((screenSize.width - 30) * 3) / 4;
        d.height = ((screenSize.height - 90) * 3) / 4;
        return d;
    }

    protected Dimension getSmallPanelPreferredSize() {
        Dimension d = new Dimension();
        d.width = (screenSize.width - 30) / 4;
        d.height = (screenSize.height - 90) / 4;
        return d;
    }

    protected void addComponent(Container container, Component component,
            int gridx, int gridy, int gridwidth, int gridheight, 
            Insets insets, int anchor, int fill) {
        GridBagConstraints gbc = new GridBagConstraints(gridx, gridy,
                gridwidth, gridheight, 1.0D, 1.0D, anchor, fill, insets, 0, 0);
        container.add(component, gbc);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new TVGrid());
    }


}