exporter.java

为了下东西 随便发了个 datamining 的源代码

/*
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 * Created on 2006/8/28
 *
 * @Author: Xiaojun Chen
 * $Revision$ 1.0
 *
 */

package eti.bi.alphaminer.tools;

import java.awt.Component;
import java.awt.Point;
import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileFilter;
import org.freehep.util.export.ExportDialog;

public class Exporter {
	
	private static ExportDialog exportDialog;
	
	/**
	 * @author Xiaojun Chen
	 * @param parent the parent the export dialog to show on
	 * @param toexport  component to export
	 * @param title title of this export dialog
	 * @param  filename the default export file name without predix
	 * @param p the location the export dialog locate at
	 * */
	public static void exportImage(Component parent, Component toexport, String title, String filename, Point p) {
		
		if(exportDialog==null) {
			exportDialog = new ExportDialog("Alphaminer");
		}
		
		if(p!=null) {
			exportDialog.setLocation(p);
		}
		exportDialog.showExportDialog(parent, title, toexport, filename);
		
	}
	
	public static File chooseSaveFile(Component parent, String title, FileFilter filter, boolean saveFileFilter, File selectedFile, File currentDirectory, String defaultpredic) {
		if(currentDirectory==null) {
			currentDirectory = new File(System.getProperty("user.dir"));
		}
		
		JFileChooser chooser = new JFileChooser(currentDirectory);
		chooser.setDialogTitle(title);
		chooser.setFileFilter(filter);
		chooser.setSelectedFile(selectedFile);
		
		int returnVal = chooser.showSaveDialog(parent);
		
		if(returnVal == JFileChooser.APPROVE_OPTION) {
			File chooseFile = chooser.getSelectedFile();
			if(defaultpredic!=null) {
				String filename = chooseFile.getAbsolutePath();
				if(filename.indexOf(".")<0) {
					filename = filename.concat(defaultpredic);
					chooseFile = new File(filename);
				}
			}
			
			if(saveFileFilter) {
				if(filter!=null) {
					if(!filter.accept(chooseFile)) {
						return chooseSaveFile(parent, title, filter, saveFileFilter, selectedFile, chooseFile, defaultpredic);
					}
				}
			}
			
			if(chooseFile.exists()) {
				int option = JOptionPane
				.showConfirmDialog(
						parent,
						"The file  \""
								+ chooseFile.getName()
								+ "\""
								+ " already exists. Do you want to replace the existing file?",//						
						"AlphaMiner", JOptionPane.YES_NO_OPTION,
						JOptionPane.QUESTION_MESSAGE);
				if(option == JOptionPane.YES_OPTION) {
					return chooseFile;
				}
				else if(option == JOptionPane.NO_OPTION){
					return chooseSaveFile(parent, title, filter, saveFileFilter, selectedFile, chooseFile, defaultpredic);
				}
				else if(option == JOptionPane.CANCEL_OPTION){
					return chooseSaveFile(parent, title, filter, saveFileFilter, selectedFile, chooseFile, defaultpredic);
				} 
			}
			else {
				return chooseFile;
			}
		}
		return null;
	}
	
}