怎么通过jtree叶子结点的TreePath得到叶子的ID

jgszhuzhu 2012-04-10 09:53:08



package com.MyQQ.test;



import java.awt.Color;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.io.IOException;



import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTabbedPane;

import javax.swing.JTextField;

import javax.swing.JTree;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.DefaultTreeModel;

import javax.swing.tree.TreePath;



/**

 * @author 

 * 2012-4-9

 */

public class ShowFriend {

	

	JFrame  showfriend=new JFrame();

	String  string;

	

	

	

public  void  init(String  string){

		//public  void  init(){

		showfriend.setBounds(800, 50, 290,716);

		showfriend.setBackground(Color.blue);

		JPanel  p1=new  JPanel();

		

		

		JLabel  label1=new  JLabel();

		JLabel  label2=new  JLabel();

		JLabel  label3=new  JLabel();

		JLabel  label4=new  JLabel();

		

		JTextField  tf1=new  JTextField(15);

		

		JTextField  tf2=new  JTextField(25);

		JButton  btn1=new  JButton();

		//让label2显示网名

			String  strNick;

		  strNick=new QQDB().showNick(string);

	        label2.setText( strNick);

		

		

		tf1.setText("编辑个性签名");

		tf2.setText("请输入你要查询的内容");

		label1.setIcon(new  ImageIcon(".\\src\\image\\headlog.jpg"));

		label3.setIcon(new  ImageIcon(".\\src\\image\\weather.png"));

		label4.setIcon(new  ImageIcon(".\\src\\image\\QQZone.png"));

		btn1.setIcon(new ImageIcon(".\\src\\image\\search.png"));

		

		//想要在这个panel里用setbounds必须先把p1的布局设置空

		//各个组件如果都在一个面板中以左上角为起始点

		//为各个组件设置布局

		p1.setLayout(null);

		label1.setBounds(0, 16, 79, 81);

		label1.setBorder(null);

		label2.setBounds(91,16, 124, 20);

		tf1.setBounds(91, 45, 128, 20);

		label3.setBounds(225, 16, 56, 54);

		label4.setBounds(91, 76, 189, 22);

		tf2.setBounds(0, 106, 240, 25);

		btn1.setBounds(243, 106, 32, 22);

		btn1.setBorder(null);

		btn1.addActionListener(new  MyAction());

		

		

		//JTabbedPane允许用户通过单击具有给定标题和/或图标的选项卡，在一组组件之间进行切换

		

		JTabbedPane  tPane=new  JTabbedPane(JTabbedPane.TOP);

		

		tPane.setBounds(0, 126, 290, 543);

		

		   String  str3=new QQDB().getTableName(string);

		

		  //创建树,设置node为这个树的根结点,并且名字为root

		System.out.println("1");

		  final DefaultMutableTreeNode  node=new  DefaultMutableTreeNode("root");

		  final JTree   tree=new  JTree(node);

			System.out.println("2");

		  //调用数据库里面的添加子节点的方法添加节点到根下面

		  new QQDB().createNode(node, "0",str3);

		  System.out.println("4");

		//把父子结点之间的连线去掉

		  tree.putClientProperty("JTree.lineStyle", "None");

		  //tree.setRootVisible(false);

		  //tree.putClientProperty("JTree.lineStyle", "Angled"); 用来保留连线，其实默认值也是保留连线的

	      //tree.setShowsRootHandles(true);  用来添加把手

		  //tree.setRootVisible(false);

		  

		  

	

		//JScrollPane 管理视口、可选的垂直和水平滚动条以及可选的行和列标题视口

		JScrollPane  jsp1=new  JScrollPane(tree);

		JScrollPane  jsp2=new  JScrollPane();

		JScrollPane  jsp3=new  JScrollPane();

		JScrollPane  jsp4=new  JScrollPane();

		JScrollPane  jsp5=new  JScrollPane();

		

		

		//添加jscrollpanel并且为它们添加图标

		tPane.addTab(null,new ImageIcon(".\\src\\image\\1.jpg"),jsp1);

		tPane.addTab(null,new ImageIcon(".\\src\\image\\2.jpg"),jsp2);

		tPane.addTab(null,new ImageIcon(".\\src\\image\\3.jpg"),jsp3);

		tPane.addTab(null,new ImageIcon(".\\src\\image\\4.jpg"),jsp4);

		tPane.addTab(null,new ImageIcon(".\\src\\image\\5.jpg"),jsp5);

		tPane.setBorder(null);

		jsp1.setBorder(null);

		jsp2.setBorder(null);

		jsp3.setBorder(null);

		jsp4.setBorder(null);

		jsp5.setBorder(null);

		

		

		MouseListener ml = new MouseAdapter() {

            public void mousePressed(MouseEvent e) {

                int selRow = tree.getRowForLocation(e.getX(), e.getY());

                TreePath selPath = tree.getPathForLocation(e.getX(), e.getY());

                if(selRow != -1) {

                    if(e.getClickCount() == 1) {

                        mySingleClick(selRow, selPath);

                    }

                    else if(e.getClickCount() == 2) {

                        myDoubleClick(selRow, selPath);

                        

                    }

                }

            }



			private void myDoubleClick(int selRow, TreePath selPath) {

				//判断是不是最后的节点,用路径值看是不是数据库里面要求的第三级

				if (selPath.getPathCount()==3) 

				{

				    





???????????这里怎么拿到叶子的ID呢，现在可以拿到的只是name

					//把当前节点的Id传递进去

					new DialogJFrame();

					//selPath.getLastPathComponent()得到的是节点name,通过这个name去查ID

					System.out.println(selPath.getLastPathComponent());

					System.out.println(selPath);

					System.out.println("--------------");

				

			}else {

					//打开下面的子节点，不用写

				

					

			}

				

			}



			private void mySingleClick(int selRow, TreePath selPath) {

				

			}

        };

        tree.addMouseListener(ml);

		

		

		 

		

		//p1.setBackground(Color.BLUE);

		p1.add(label1);

		p1.add(label2);

		p1.add(label3);

		p1.add(label4);

		p1.add(tf1);

		p1.add(tf2);

		p1.add(btn1);

		p1.add(tPane);

		

		showfriend.add(p1);

		

		showfriend.setVisible(true);

		showfriend.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		

		

	}

	//public static void main(String[] args) {

	

	 public void showfriend(String str){

	    	this.string=str;

	    	//为了显示网名，我们把ID一直传下去，便于数据库的查询

	    	init(string);

	    	//new ShowFriend();

	    }

}



//打开网页进行搜索

class   MyAction   implements  ActionListener{



	public void actionPerformed(ActionEvent e) {

		 try {

			   Process process = Runtime.getRuntime().exec("explorer http://www.baidu.com");

			  } catch (IOException e3) {

			 e3.printStackTrace();

			  }

			 }

		

	}

	







数据库操作如下





	//创建树遍历表里面的节点

	

	public void createNode(DefaultMutableTreeNode parent, String ParentId,String   string){

	

			try {

                  		

				 this.str1=string;

				 

				 

				if (str1.equals("adminfriend")) {

					DefaultMutableTreeNode  temp=null;

					

					String  sql="select  friendId,name,ParentId  from  adminfriend  where  ParentID='" + ParentId + "'"; 

				

					stmt=conn.createStatement();

					res=stmt.executeQuery(sql);

		

			//定义光标位置	

				int i=0;

				

				while (res.next()) {

				



					i++;

				   temp=new DefaultMutableTreeNode(res.getString("name"));

				   parent.add(temp);

				   createNode(temp, res.getString("friendId"),string);

				   res=stmt.executeQuery(sql);

				   res.relative(i);

					

				}

			}if (string.equals("rootfriend")) {

				DefaultMutableTreeNode  temp=null;

				

				String  sql="select  friendId,name,ParentId  from  rootfriend  where  ParentID='" + ParentId + "'"; 

			

				stmt=conn.createStatement();

				res=stmt.executeQuery(sql);

			

			

		

		//定义光标位置	

			int i=0;

			

			while (res.next()) {

			



				i++;

			   temp=new DefaultMutableTreeNode(res.getString("name"));

			   parent.add(temp);

			   createNode(temp, res.getString("friendId"),string);

			   res=stmt.executeQuery(sql);

			   res.relative(i);

				

			}

			}

				

			

				

			} catch (Exception e) {

				e.printStackTrace();

			}

			



				

				

			}



数据库如图