图片拼接

package com.image.splice;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.FileDialog;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Panel;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileNameExtensionFilter;



public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		EventQueue.invokeLater(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				SpliceImageFrame frame = new SpliceImageFrame();
				frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				frame.setVisible(true);
			}
		});
	}

}

class SpliceImageFrame extends JFrame {
	Image image1 = null;
	Image image2 = null;
	private static final int WIDTH = 500;
	private static final int HEIGHT = 500;

	public File loadImage() {
		JFileChooser fileChooser = new JFileChooser();// 创建文件选择器
		FileFilter filter = new FileNameExtensionFilter("Image（JPG/GIF/BMP)",
				"JPG", "JPEG", "GIF", "BMP");// 创建过滤器
		fileChooser.setFileFilter(filter);// 设置过滤器
		int i = fileChooser.showOpenDialog(null);// 显示打开对话框
		File imgFile = null;
		if (i == JFileChooser.APPROVE_OPTION) {
			imgFile = fileChooser.getSelectedFile(); // 获取选中图片的File对象
			System.out.println(imgFile);
		}
		return imgFile;

	}

	public SpliceImageFrame() {
		setSize(400, 300);

		final ImagePanel imagePanel = new ImagePanel();
		this.add(imagePanel);

		Panel panel = new Panel();
		this.add(panel, BorderLayout.SOUTH);

		JButton imageOneButton = new JButton();
		imageOneButton.setText("Image1");
		panel.add(imageOneButton);
		imageOneButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				File imageFile = loadImage();
				Toolkit kit = Toolkit.getDefaultToolkit();
				if (imageFile != null) {
					try {
						image1 = ImageIO.read(imageFile);// 构造BufferedImage对象
					} catch (IOException ex) {
						ex.printStackTrace();
					}
				}
				imagePanel.repaint();
			}
		});

		JButton imageTwoButton = new JButton();
		imageTwoButton.setText("Image2");
		panel.add(imageTwoButton);
		imageTwoButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				File imageFile = loadImage();
				Toolkit kit = Toolkit.getDefaultToolkit();
				if (imageFile != null) {
					try {
						image2 = ImageIO.read(imageFile);// 构造BufferedImage对象
					} catch (IOException ex) {
						ex.printStackTrace();
					}
				}
				imagePanel.repaint();
			}
		});

		JButton spliceButton = new JButton();
		spliceButton.setText("splice");
		panel.add(spliceButton);
		spliceButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				FileDialog dialog = new FileDialog(SpliceImageFrame.this,"保存");// 创建对话框
                dialog.setMode(FileDialog.SAVE);// 设置对话框为保存对话框
                dialog.setVisible(true);// 显示保存对话框
                String path = dialog.getDirectory();// 获得文件的保存路径
                String fileName = dialog.getFile();// 获得保存的文件名
//                if (path == null || fileName == null){
//                    return;
//                }
//                String fileExtName = fileName.substring(fileName.indexOf(".")+1);// 文件扩展名,不含点
//                String pathAndName = path + "\\" + fileName;// 文件的完整路径
//				if (path == null || fileName == null) {
//					return;
//				}
//				String fileExtName = fileName
//						.substring(fileName.indexOf(".") + 1);// 文件扩展名,不含点
				String pathAndName = path + "\\" + fileName+".jpg";// 文件的完整路径
				BufferedImage bufferImage = new BufferedImage(WIDTH*2, HEIGHT,
						BufferedImage.TYPE_INT_RGB);
				Graphics g = bufferImage.getGraphics();// 获得绘图上下文对象
				g.drawImage(image1, 0, 0, WIDTH, HEIGHT, null);
				g.drawImage(image2, WIDTH, 0, WIDTH, HEIGHT, null);
				try {
					ImageIO.write(bufferImage, "jpg", new File(pathAndName));
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}
		});

	}

	private class ImagePanel extends Panel {
		public ImagePanel() {
			setSize(200, 100);
		}

		@Override
		public void paint(Graphics g) {
			// TODO Auto-generated method stub
			g.drawImage(image1, 0, 0, 150, 200, null);
			g.drawImage(image2, 150, 0, 150, 200, null);
		}

	}
}