java读取raw格式的图片并显示

/** * @ReadWriteRAW.java * @Version 1.0, 2009.5.18 * @Author Xie-Hua Sun * Read *.gif, *.jpg, *.jpeg, *.png, *.raw, *.dat * Save as *.RAW images */ import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.awt.image.*; import java.io.*; public class ReadWriteRAW extends Frame implements ActionListener { private MenuItem openItem; private MenuItem saveItem; private MenuItem exitItem; Image image; int[] pixels; int width = 256, // (Baboo.raw 512*512, 256k) height = 256; boolean flag = false; //装载图像标志 //构造方法 public ReadWriteRAW() { setTitle("图像载入与存储 保存为RAW文件"); this.setBackground(Color.lightGray); //关闭窗口 addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); //菜单界面 Menu fileMenu = new Menu("文件"); openItem = new MenuItem("打开"); openItem.addActionListener(this); fileMenu.add(openItem); saveItem = new MenuItem("保存"); saveItem.addActionListener(this); fileMenu.add(saveItem); exitItem = new MenuItem("退出"); exitItem.addActionListener(this); fileMenu.add(exitItem); MenuBar menuBar = new MenuBar(); menuBar.add(fileMenu); setMenuBar(menuBar); setSize(266, 320); setVisible(true); } //调用paint()方法，显示图像信息。 public void paint(Graphics g) { if(flag) g.drawImage(image,5,50,this); } public void actionPerformed(ActionEvent e) { //打开JPG图像 if(e.getSource() == openItem) { MediaTracker mt = new MediaTracker(this); //文件选择对话框 JFileChooser chooser = new JFileChooser(); int r = chooseFile(chooser, "."); if(r == JFileChooser.APPROVE_OPTION) { String name = chooser.getSelectedFile().getAbsolutePath(); //取文件名长度 int len = name.length(); //取文件名的扩展名 String str = name.substring(len-3,len); //若为RAW或DAT文件 if(str.equalsIgnoreCase("raw")||str.equalsIgnoreCase("dat")) { JOptionPane.showMessageDialog(null,"若RAW图像大小不是64k,"+ "需修改width,height!", "Alert", JOptionPane.INFORMATION_MESSAGE); readRAW(name, width, height); } else { image = openImage(name); } flag = true; repaint(); } } //将image编码为RAW图像 else if(e.getSource() == saveItem) { pixels = new int[width * height]; try { PixelGrabber pg = new PixelGrabber(image, 0, 0, width, height, pixels,0, width); pg.grabPixels(); } catch (InterruptedException e3) { e3.printStackTrace(); } writeRAW("../image/test.raw", pixels, width, height); JOptionPane.showMessageDialog(null,"在目录image，保存图像test.raw成功!", "Alert",JOptionPane.INFORMATION_MESSAGE); } } //读入.raw文件 public void readRAW(String name, int iw, int ih) { int[] pixels = new int[iw*ih]; try { FileInputStream fin = new FileInputStream(name); DataInputStream in = new DataInputStream(fin); for(int i = 0; i < iw*ih; i++){ //磁盘文件读入数据 int c = in.readByte(); if(c < 0) c = c + 256; pixels[i] = (255<<24)|(c<<16)|(c<<8)|c; } } catch(IOException e1){System.out.println("Exception!");} //将数组中的象素产生一个图像 ImageProducer ip = new MemoryImageSource(iw, ih, pixels, 0, iw); image = createImage(ip); } //在当前目录写入.raw文件 public void writeRAW(String name, int[] pix, int iw, int ih) { try { RandomAccessFile rf = new RandomAccessFile(name,"rw"); for(int i = 0; i < iw*ih; i++) rf.writeByte((byte)(pix[i]&0xff)); rf.close(); } catch(FileNotFoundException e1){ System.err.println(e1); } catch(IOException e2){ System.err.println(e2); } } public int chooseFile(JFileChooser jfc, String str) { //设置默认文件目录 jfc.setCurrentDirectory(new File(str)); //设置参数gif,jpg,jpeg,png为本程序可显示图像 jfc.setFileFilter(new javax.swing.filechooser.FileFilter() { public boolean accept(File f) { String name = f.getName().toLowerCase(); return name.endsWith(".gif") || name.endsWith(".jpg") || name.endsWith(".jpeg") || name.endsWith(".png") || name.endsWith(".raw") || name.endsWith(".dat") || f.isDirectory(); } public String getDescription() { return "Image files(*.gif, *.jpg, *.jpeg, *.png, *.raw, *.dat)"; } }); return (jfc.showOpenDialog(this)); } //打开图像 public Image openImage(String is) { //用MediaTracker跟踪图像加载 MediaTracker tracker = new MediaTracker(this); Image im = Toolkit.getDefaultToolkit().getImage(is); tracker.addImage(im,0); //等待图像完成加载 try { tracker.waitForID(0); } catch(InterruptedException e){ } return im; } public static void main(String[] args) { new ReadWriteRAW(); } }