console.java

基于xml的元数据系统 解析xml文档

package xml;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FileDialog;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.crimson.tree.XmlDocument;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;

public class Console extends JFrame implements ActionListener
{
	private JTextField textField;
	private JButton b_open;
	private JButton b_edit;
	private JButton b_insert;
	private JButton b_delete;
	private JButton b_save;
	private String xmlFilePath = null;
	private Document doc = null;
	private JTree tree = null;
	private DomDefaultMutableTreeNode selectedNode = null;
	
	public Console()
	{
		super("元数据编辑系统");
		
		java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
		setBounds((screenSize.width-600)/2, (screenSize.height-500)/2, 600, 500);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		final JPanel panel = new JPanel();
		final FlowLayout flowLayout_1 = new FlowLayout();
		flowLayout_1.setHgap(20);
		panel.setLayout(flowLayout_1);
		getContentPane().add(panel, BorderLayout.NORTH);

		textField = new JTextField();
		textField.setPreferredSize(new Dimension(400, 25));
		panel.add(textField);

		b_open = new JButton();
		b_open.setPreferredSize(new Dimension(100, 25));
		b_open.setText("打开  (O)");
		b_open.setMnemonic(KeyEvent.VK_O);
		b_open.addActionListener(this);
		panel.add(b_open);

		final JPanel panel_1 = new JPanel();
		final FlowLayout flowLayout = new FlowLayout();
		flowLayout.setHgap(20);
		panel_1.setLayout(flowLayout);
		panel_1.setPreferredSize(new Dimension(0, 40));
		getContentPane().add(panel_1, BorderLayout.SOUTH);

		b_edit = new JButton();
		b_edit.setPreferredSize(new Dimension(100, 25));
		b_edit.setText("编辑  (E)");
		b_edit.setMnemonic(KeyEvent.VK_E);
		b_edit.addActionListener(this);
		panel_1.add(b_edit);

		b_insert = new JButton();
		b_insert.setPreferredSize(new Dimension(100, 25));
		b_insert.setText("插入  (I)");
		b_insert.setMnemonic(KeyEvent.VK_I);
		b_insert.addActionListener(this);
		panel_1.add(b_insert);

		b_delete = new JButton();
		b_delete.setPreferredSize(new Dimension(100, 25));
		b_delete.setText("删除  (D)");
		b_delete.setMnemonic(KeyEvent.VK_D);
		b_delete.addActionListener(this);
		panel_1.add(b_delete);

		b_save = new JButton();
		b_save.setPreferredSize(new Dimension(100, 25));
		b_save.setText("保存  (S)");
		b_save.setMnemonic(KeyEvent.VK_S);
		b_save.addActionListener(this);
		panel_1.add(b_save);
		
		tree = new JTree(new DefaultTreeModel(null));
		tree.addMouseListener(ma);

		final JScrollPane scrollPane = new JScrollPane();
		scrollPane.setViewportView(tree);
		getContentPane().add(scrollPane, BorderLayout.CENTER);
		
		//
	}
	
	private void init()
	{	
		doc = getDocument(xmlFilePath);
		tree.setModel(new DomTreeModelFactory(doc).getDomTreeModel());
	}
	
	private Document getDocument(String xmlFilePath)
	{
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		DocumentBuilder db = null;
		Document doc = null;
		try {
			db = dbf.newDocumentBuilder();
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		}
		try {
			doc = db.parse(new File(xmlFilePath));
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return doc;
	}
	
	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource() == b_open)
		{
			FileDialog fileDialog = new FileDialog(this, "打开XML文件...", FileDialog.LOAD);
			fileDialog.setVisible(true);
			xmlFilePath =  fileDialog.getDirectory() + fileDialog.getFile();
			textField.setText(xmlFilePath);
			
			init();
		}
		
		else if(e.getSource() == b_edit)
		{
			if(selectedNode == null)
				JOptionPane.showMessageDialog(null, "您未选择节点！", "警告", JOptionPane.WARNING_MESSAGE);
			else if(((Node)selectedNode.getUserObject()).getNodeType() == 3)
				new EditNodeValue(this, selectedNode, tree).setVisible(true);
		}
		
		else if(e.getSource() == b_insert)
		{
			if(selectedNode == null)
				JOptionPane.showMessageDialog(null, "您未选择节点！", "警告", JOptionPane.WARNING_MESSAGE);
			else if(((Node)selectedNode.getUserObject()).getNodeType() != 3)
				new InsertTextNode(this, selectedNode, tree, doc).setVisible(true);
		}
		
		else if(e.getSource() == b_delete)
		{
			if(selectedNode == null)
				JOptionPane.showMessageDialog(null, "您未选择节点！", "警告", JOptionPane.WARNING_MESSAGE);
			else
			{
				Node node = (Node)selectedNode.getUserObject();
				if(node.getNodeType() == 3)
				{
					((DomDefaultMutableTreeNode)(selectedNode.getParent())).remove(selectedNode);
					node.getParentNode().removeChild(node);
					tree.updateUI();	//刷新树
				}
				else
					JOptionPane.showMessageDialog(null, "您无法删除该节点！", "警告", JOptionPane.WARNING_MESSAGE);
			}		
		}
		
		else if(e.getSource() == b_save)
		{
			try {
				((XmlDocument)doc).write(new FileOutputStream(new File(xmlFilePath)));
				JOptionPane.showMessageDialog(null, "保存成功！", "提示", JOptionPane.WARNING_MESSAGE);
			} catch (FileNotFoundException e1) {
				JOptionPane.showMessageDialog(null, e1.getMessage(), "警告", JOptionPane.WARNING_MESSAGE);
			} catch (IOException e1) {
				JOptionPane.showMessageDialog(null, e1.getMessage(), "警告", JOptionPane.WARNING_MESSAGE);
			}
		}
	}
	
	private MouseAdapter ma = new MouseAdapter()
	{
		public void mousePressed(MouseEvent e)
		{
			JTree tree = (JTree) e.getSource();
			int rowLocation = tree.getRowForLocation(e.getX(), e.getY());
			if (rowLocation > 0)
			{
				TreePath treepath = tree.getPathForRow(rowLocation);
				selectedNode = (DomDefaultMutableTreeNode) treepath.getLastPathComponent();
			}
		}
	};
	
	public static void main(String args[])
	{
		try {
			Console frame = new Console();
			frame.setVisible(true);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}



}