Java桌面程序，左边是树，点击不同节点显示不同内容，怎么做到？

xuzhujun728 2009-07-03 08:21:26

Java桌面程序，左边是树——我用的是JTree，点击不同节点在树的右边显示不同内容，怎么做到？请知道的务必帮帮忙，谢谢！！！

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zjny520 2009-07-07

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七楼的welcomePanel 是什么？？

QuickPai 2009-07-04

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这个我昨天刚做过，左边是一个JTree，右边是一个JPanel，当点击左边的节点时，添加一个addTreeSelectionListener监听，在valueChanged(TreeSelectionEvent e)事件里面先找到你点击的节点TreePath,然后依此添加此节点的子节点到JPanel上，我用的是添加一个个的JButton，
具体的部分代码如下：
Object[] path = e.getPath().getPath(); //TreePath.getPath(),返回有序的 Objects 数组，它包含此 TreePath 的组件
String ss = "";
for (int i = 1; i < path.length; i++) {
ss += File.separator + path[i].toString();
}
File f = new File(ss.substring(1));
lbStatus.setText(f.toString());
String[] list = f.list();
Vector vFile = new Vector(), vDir = new Vector();
for (int i = 0; i < list.length; i++) {
if ((new File(ss + File.separator + list[i])).isDirectory()) {
vDir.addElement(list[i]);
} else {
vFile.addElement(list[i]);
}
}
for (int i = 0; i < vDir.size(); i++) {
addButton((String) (vDir.elementAt(i)), ss);
}
for (int i = 0; i < vFile.size(); i++) {
addButton((String) (vFile.elementAt(i)), ss);
}

方法addButton:private void addButton(String fileName, String filePath) {
JButton btt = new JButton(fileName);
btt.setBorder(null);
btt.setHorizontalAlignment(SwingConstants.LEFT); //设置图标和文本的水平对齐方式。
btt.setBackground(Color.white);
if ((new File(filePath + File.separator + fileName)).isDirectory()) {
btt.setIcon(UIManager.getIcon("Tree.closedIcon"));
} else {
btt.setIcon(UIManager.getIcon("Tree.leafIcon"));
}
filePanel.add(btt);
btt.addActionListener(this);
}

小宝z 2009-07-04

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用JSplitPane实现。

把JTree放左面，右面放置Panel 然后点击不同的节点，右面重置panel就可以了。

package module11.event.treeselectionlistener;

import java.awt.*;

import javax.swing.*;

import javax.swing.event.TreeSelectionEvent;

import javax.swing.event.TreeSelectionListener;

import javax.swing.tree.DefaultMutableTreeNode;

public class JSplitPane_JTree extends JFrame{

	private JSplitPane jsp;

	private JTree jt;

	private WelcomePanel welcomePanel 

	= new WelcomePanel();

	private QueryPanel queryPanel 

	= new QueryPanel();

	

	public JSplitPane_JTree(){

		initGUI();

	}

	private void initGUI() {

		// TODO Auto-generated method stub

		this.setSize(new Dimension(400,300));

		this.setTitle("JSplitPane_JTree");

		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		

		Container c = this.getContentPane();

		DefaultMutableTreeNode root = 

			new DefaultMutableTreeNode("信用卡自助服务");

		DefaultMutableTreeNode chiled1 = 

			new DefaultMutableTreeNode("查询");

		DefaultMutableTreeNode chiled2 = 

			new DefaultMutableTreeNode("存款");

		DefaultMutableTreeNode chiled3 = 

			new DefaultMutableTreeNode("取款");

		root.add(chiled1);

		root.add(chiled2);

		root.add(chiled3);

		

		jt = new JTree(root);

		jt.addTreeSelectionListener(

				new MyTreeSelectionListener());

		jsp = new JSplitPane();

		jsp.setDividerLocation(100);

		jsp.add(jt,JSplitPane.LEFT);

		jsp.add(welcomePanel,JSplitPane.RIGHT);

		c.add(jsp);

	}

	

	class MyTreeSelectionListener implements TreeSelectionListener{



		public void valueChanged(TreeSelectionEvent arg0) {

			// TODO Auto-generated method stub

			String node = jt.getLastSelectedPathComponent()

			.toString();

			if(node.equals("查询")){

				jsp.remove(jsp.getRightComponent());

				jsp.add(queryPanel,JSplitPane.RIGHT);

			}else{

				jsp.remove(jsp.getRightComponent());

				jsp.add(welcomePanel,JSplitPane.RIGHT);

			}

		}

		

	}

}

package module11.event.treeselectionlistener;

import java.awt.*;

import javax.swing.*;

public class JSplitPane_JTreeTest {



	/**

	 * @param args

	 * @throws UnsupportedLookAndFeelException 

	 * @throws IllegalAccessException 

	 * @throws InstantiationException 

	 * @throws ClassNotFoundException 

	 */

	public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException {

		// TODO Auto-generated method stub

		UIManager.setLookAndFeel(

				UIManager.

				getSystemLookAndFeelClassName());

		JSplitPane_JTree frame = 

			new JSplitPane_JTree();

		frame.setVisible(true);

	}



}