我正在开发一个应用程序，其中用户加载图像可以缩放它，也可以保存它。也可以通过菜单项单击旋转来旋转图像。
单击旋转另一个框架会打开，最后定位或最后缩放的图像加载到旋转面板中。现在，当用户单击旋转选项时，图像应保存在该位置，但尚未完成。
如果有人知道，请帮助我。我制作了 2 个文件 1. 加载图像并保存 ScaleIMG 图像和 2. 旋转 RotateIMGn 图像。
ScaleIMG.java
package logic;
import logic.RotateIMGn;
public class ScaleIMG extends JFrame {
private static final long serialVersionUID = 1L;
public static int widthx,heightx;
public static String passpath;
public static void main(String[] args)
{
new ScaleIMG().run();
}
public void run()
{
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
ScaleIMG frame1 = new ScaleIMG();
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame1.getContentPane().setLayout(new BorderLayout());
frame1.getContentPane().add(new ViewPane());
frame1.pack();
frame1.setLocationRelativeTo(null);
frame1.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
public ScaleIMG() {
final ImagePane s = new ImagePane();
setTitle("Keyur");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 500, 300);
JMenuBar menuBar = new JMenuBar();
setJMenuBar(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem mntmLoadImage = new JMenuItem("Load Image");
mnFile.add(mntmLoadImage);
JMenuItem mntmSaveImage = new JMenuItem("Save Image");
mntmSaveImage.addActionListener(new ActionListener()
{
@Override
public void actionPerformed (ActionEvent e)
{
try
{
s.save("D:\\Workspace\\ScaleImage\\src\\images", "scaled_img_");
} catch (IOException e1)
{
e1.printStackTrace();
}
}
});
mnFile.add(mntmSaveImage);
JSeparator separator = new JSeparator();
mnFile.add(separator);
JMenuItem mntmExit = new JMenuItem("Exit");
mnFile.add(mntmExit);
JMenu mnEdit = new JMenu("Edit");
menuBar.add(mnEdit);
JMenuItem mntmIncreaseBright = new JMenuItem("Increase Bright");
mnEdit.add(mntmIncreaseBright);
JMenuItem mntmDecreaseBright = new JMenuItem("Decrease Bright");
mnEdit.add(mntmDecreaseBright);
JSeparator separator_1 = new JSeparator();
mnEdit.add(separator_1);
JMenuItem mntmRestoreImage = new JMenuItem("Restore Image");
mnEdit.add(mntmRestoreImage);
JMenuItem mntmRotateImage = new JMenuItem("Rotate Image");
mnEdit.add(mntmRotateImage);
mntmRotateImage.addActionListener(new ActionListener() {
@Override
public void actionPerformed (ActionEvent e)
{
System.out.println(widthx);
System.out.println(heightx);
try
{
s.save("D:\\Workspace\\ScaleImage\\src\\images", "scaled_img_");
RotateIMGn rm = new RotateIMGn(passpath);
JFrame frame = new JFrame();
frame.setContentPane(rm);
frame.pack();
frame.setVisible(true);
} catch (IOException e1)
{
e1.printStackTrace();
}
}
});
JMenu mnHelp = new JMenu("Help");
menuBar.add(mnHelp);
JMenuItem mntmHelpCtrl = new JMenuItem("Help ctrl + K");
mnHelp.add(mntmHelpCtrl);
JMenuItem mntmAboutImageEditor = new JMenuItem("About Image Editor");
mnHelp.add(mntmAboutImageEditor);
JSeparator separator_2 = new JSeparator();
mnHelp.add(separator_2);
JMenuItem mntmAboutCompany = new JMenuItem("About Company");
mnHelp.add(mntmAboutCompany);
}
public class ViewPane extends JPanel {
private static final long serialVersionUID = 1L;
public ViewPane() {
setLayout(null);
ImagePane imagePane = new ImagePane();
imagePane.setSize(imagePane.getPreferredSize());
imagePane.setLocation(0, 0);
add(imagePane);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(1200, 665);
}
}
public static class ImagePane extends JPanel {
private static final long serialVersionUID = 1L;
private BufferedImage bg;
private BufferedImage scaled;
public String pathpass1;
public String namepass1;
public ImagePane() {
try {
bg = ImageIO.read(getClass().getResource("/images/src11.jpg"));
pathpass1="D:\\Workspace\\ScaleImage\\src\\images";
namepass1="src11.jpg";
scaled = getScaledInstanceToFit(bg, new Dimension(600, 600));
} catch (IOException ex) {
ex.printStackTrace();
}
setBackground(Color.BLACK);
MouseHandler handler = new MouseHandler();
addMouseListener(handler);
addMouseMotionListener(handler);
}
public void save(String path, String name) throws IOException
{
BufferedImage bf = new BufferedImage(widthx, heightx, BufferedImage.TYPE_INT_RGB);
Graphics gg = bf.getGraphics();
gg.drawImage(scaled,0,0,widthx,heightx,null);
System.out.println(widthx);
System.out.println(heightx);
String s = "/images/src11.jpg";
String sub = s.substring(s.lastIndexOf("/")+1);
System.out.println(sub);
if (bf != null)
{
name += bf.getWidth() + "x" + bf.getHeight();
ImageIO.write(bf, "jpg", new File(path + File.separator + name + ".jpg"));
passpath = path+File.separator+name+".jpg";
pathpass1 =path;
namepass1=sub;
System.out.println(pathpass1);
}
else
{
throw new NullPointerException("Scaled instance is null");
}
}
@Override
public Dimension getPreferredSize() {
return bg == null ? new Dimension(200, 200) : new Dimension(scaled.getWidth(), scaled.getHeight());
}
@Override
public void invalidate() {
super.invalidate();
scaled = getScaledInstanceToFit(bg, getSize());
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
int x = (getWidth() - scaled.getWidth()) / 2;
int y = (getHeight() - scaled.getHeight()) / 2;
g2d.drawImage(scaled, x, y, this);
g2d.dispose();
}
public enum MouseAction {
Move(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR)),
ResizeSouth(Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR)),
ResizeNorth(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR)),
ResizeEast(Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR)),
ResizeWest(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR)),
ResizeNorthEast(Cursor.getPredefinedCursor(Cursor.NE_RESIZE_CURSOR)),
ResizeNorthWest(Cursor.getPredefinedCursor(Cursor.NW_RESIZE_CURSOR)),
ResizeSouthEast(Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR)),
ResizeSouthWest(Cursor.getPredefinedCursor(Cursor.SW_RESIZE_CURSOR));
private Cursor cursor;
private MouseAction(Cursor cursor) {
this.cursor = cursor;
}
public Cursor getCursor() {
return cursor;
}
}
public class MouseHandler extends MouseAdapter {
private MouseAction action;
private Point clickPoint;
private boolean ignoreMoves;
protected void updateAction(MouseEvent e) {
int x = e.getX();
int y = e.getY();
int width = getWidth();
int height = getHeight();
if (x < 10 && y < 10) {
action = MouseAction.ResizeNorthWest;
} else if (x > width - 10 && y < 10) {
action = MouseAction.ResizeNorthWest;
} else if (y < 10) {
action = MouseAction.ResizeNorth;
} else if (x < 10 && y > height - 10) {
action = MouseAction.ResizeSouthWest;
} else if (x > width - 10 && y > height - 10) {
action = MouseAction.ResizeSouthEast;
} else if (y > height - 10) {
action = MouseAction.ResizeSouth;
} else if (x < 10) {
action = MouseAction.ResizeWest;
} else if (x > width - 10) {
action = MouseAction.ResizeEast;
} else {
action = MouseAction.Move;
}
setCursor(action.getCursor());
}
@Override
public void mouseMoved(MouseEvent e) {
if (!ignoreMoves) {
updateAction(e);
}
}
@Override
public void mousePressed(MouseEvent e) {
updateAction(e);
ignoreMoves = true;
clickPoint = e.getPoint();
}
@Override
public void mouseReleased(MouseEvent e) {
clickPoint = null;
ignoreMoves = false;
}
@Override
public void mouseDragged(MouseEvent e) {
switch (action) {
case Move: {
Point p = e.getPoint();
p.x -= clickPoint.x;
p.y -= clickPoint.y;
p = SwingUtilities.convertPoint(ImagePane.this, p, getParent());
setLocation(p);
}
break;
case ResizeWest: {
Point p = e.getPoint();
int xDelta = p.x - clickPoint.x;
int width = getWidth() - xDelta;
int x = getX() + xDelta;
setSize(width, getHeight());
setLocation(x, getY());
revalidate();
}
break;
case ResizeEast: {
Point p = e.getPoint();
int xDelta = p.x - clickPoint.x;
int width = getWidth() + xDelta;
setSize(width, getHeight());
revalidate();
clickPoint = p;
}
break;
case ResizeNorth: {
Point p = e.getPoint();
int yDelta = p.y - clickPoint.y;
int height = getHeight() - yDelta;
int y = getY() + yDelta;
setSize(getWidth(), height);
setLocation(getX(), y);
revalidate();
}
break;
case ResizeSouth: {
Point p = e.getPoint();
int yDelta = p.y - clickPoint.y;
int height = getHeight() + yDelta;
setSize(getWidth(), height);
revalidate();
clickPoint = p;
}
break;
}
}
@Override
public void mouseExited(MouseEvent e) {
}
}
}
public static BufferedImage getScaledInstanceToFit(BufferedImage img, Dimension size) {
double scaleFactor = getScaleFactorToFit(img, size);
return getScaledInstance(img, scaleFactor);
}
public static BufferedImage getScaledInstance(BufferedImage img, double dScaleFactor) {
BufferedImage imgBuffer = null;
imgBuffer = getScaledInstance(img, dScaleFactor, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
return imgBuffer;
}
protected static BufferedImage getScaledInstance(BufferedImage img, double dScaleFactor, Object hint) {
BufferedImage imgScale = img;
int iImageWidth = (int) Math.round(img.getWidth() * dScaleFactor);
int iImageHeight = (int) Math.round(img.getHeight() * dScaleFactor);
if (dScaleFactor <= 1.0d) {
imgScale = getScaledDownInstance(img, iImageWidth, iImageHeight, hint);
} else {
imgScale = getScaledUpInstance(img, iImageWidth, iImageHeight, hint);
}
return imgScale;
}
protected static BufferedImage getScaledDownInstance(BufferedImage img,
int targetWidth,
int targetHeight,
Object hint) {
// System.out.println("Scale down...");
int type = (img.getTransparency() == Transparency.OPAQUE)
? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
BufferedImage ret = (BufferedImage) img;
if (targetHeight > 0 || targetWidth > 0) {
int w, h;
// Use multi-step technique: start with original size, then
// scale down in multiple passes with drawImage()
// until the target size is reached
w = img.getWidth();
h = img.getHeight();
do {
if (w > targetWidth) {
w /= 2;
if (w < targetWidth) {
w = targetWidth;
}
}
if (h > targetHeight) {
h /= 2;
if (h < targetHeight) {
h = targetHeight;
}
}
BufferedImage tmp = new BufferedImage(Math.max(w, 1), Math.max(h, 1), type);
Graphics2D g2 = tmp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, hint);
ScaleIMG.heightx=h;
ScaleIMG.widthx=w;
g2.drawImage(ret, 0, 0, w, h, null);
g2.dispose();
ret = tmp;
} while (w != targetWidth || h != targetHeight);
} else {
ret = new BufferedImage(1, 1, type);
}
return ret;
}
protected static BufferedImage getScaledUpInstance(BufferedImage img,
int targetWidth,
int targetHeight,
Object hint) {
int type = BufferedImage.TYPE_INT_ARGB;
BufferedImage ret = (BufferedImage) img;
int w, h;
w = img.getWidth();
h = img.getHeight();
do {
if (w < targetWidth) {
w *= 2;
if (w > targetWidth) {
w = targetWidth;
}
}
if (h < targetHeight) {
h *= 2;
if (h > targetHeight) {
h = targetHeight;
}
}
BufferedImage tmp = new BufferedImage(w, h, type);
Graphics2D g2 = tmp.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, hint);
g2.drawImage(ret, 0, 0, w, h, null);
g2.dispose();
ret = tmp;
tmp = null;
} while (w != targetWidth || h != targetHeight);
return ret;
}
public static double getScaleFactorToFit(BufferedImage img, Dimension size) {
double dScale = 1;
if (img != null) {
int imageWidth = img.getWidth();
int imageHeight = img.getHeight();
dScale = getScaleFactorToFit(new Dimension(imageWidth, imageHeight), size);
}
return dScale;
}
public static double getScaleFactorToFit(Dimension original, Dimension toFit) {
double dScale = 1d;
if (original != null && toFit != null) {
double dScaleWidth = getScaleFactor(original.width, toFit.width);
double dScaleHeight = getScaleFactor(original.height, toFit.height);
dScale = Math.min(dScaleHeight, dScaleWidth);
}
return dScale;
}
public static double getScaleFactor(int iMasterSize, int iTargetSize) {
double dScale = 1;
if (iMasterSize > iTargetSize) {
dScale = (double) iTargetSize / (double) iMasterSize;
} else {
dScale = (double) iTargetSize / (double) iMasterSize;
}
return dScale;
}
}
旋转IMGn.java
package logic;
import logic.ScaleIMG.ImagePane;
public class RotateIMGn extends JPanel
{
private static final long serialVersionUID = 1L;
public ImageIcon image;
JLabel label = new JLabel(image);
JPanel rotationPanel;
final int WIDTH = 350;
final int HEIGHT = 500;
double degrees=0;
ImagePane iobj = new ImagePane();
public RotateIMGn(String passpath)
{
image =new ImageIcon(passpath);
setPreferredSize(new Dimension(446, 500));
setFocusable(true);
//addKeyListener(new KeyboardListener());
rotationPanel = new JPanel();
rotationPanel = new turningCanvas();
rotationPanel.setPreferredSize(new Dimension(image.getIconWidth(),image.getIconHeight()));
add(rotationPanel);
JMenuBar menuBar = new JMenuBar();
add(menuBar);
JMenu mnFile = new JMenu("Rotate");
menuBar.add(mnFile);
ImageIcon icon90 = createImageIcon("/images/images_Right.png");
JMenuItem mntmTR90 = new JMenuItem("Rotate 90+",icon90);
mntmTR90.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent arg0)
{
try
{
degrees+=90.0;
repaint();
}
catch(Exception e)
{
e.printStackTrace();
}
}
});
mnFile.add(mntmTR90);
ImageIcon icon180 = createImageIcon("/images/images_Vertical.png");
JMenuItem mntmRT180 = new JMenuItem("Rotate 180+",icon180);
mntmRT180.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
try
{
degrees+=180.0;
repaint();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
});
mnFile.add(mntmRT180);
JSeparator separator = new JSeparator();
mnFile.add(separator);
ImageIcon micon90 = createImageIcon("/images/images_Left.png");
JMenuItem mntmTRM90 = new JMenuItem("Rotate 90-",micon90);
mntmTRM90.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
try
{
degrees-=90.0;
repaint();
}
catch(Exception exc)
{
exc.printStackTrace();
}
}
});
mnFile.add(mntmTRM90);
ImageIcon micon180 = createImageIcon("/images/images_Horizontal.png");
JMenuItem mntmRTM180 = new JMenuItem("Rotate 180-",micon180);
mntmRTM180.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent e)
{
try
{
degrees-=180.0;
repaint();
}
catch(Exception exz)
{
exz.printStackTrace();
}
}
});
mnFile.add(mntmRTM180);
rotationPanel.setBounds(WIDTH/2, HEIGHT/2, rotationPanel.getPreferredSize().width,
rotationPanel.getPreferredSize().height);
}
public void paintComponent (Graphics g)
{
super.paintComponent(g);
}
public class turningCanvas extends JPanel
{
private static final long serialVersionUID = 1L;
public void paintComponent (Graphics g)
{
try
{
System.out.println(iobj.pathpass1);
System.out.println(iobj.namepass1);
iobj.save(iobj.pathpass1, iobj.namepass1);
}
catch (IOException e)
{
e.printStackTrace();
}
super.paintComponent(g);
Graphics2D g2d = (Graphics2D)g;
g2d.rotate(Math.toRadians(degrees),image.getIconWidth()/2,image.getIconHeight()/2);
image.paintIcon(this, g2d, 0, 0);
}
}
public static void main(String[] args)
{
String mn = null;
RotateIMGn test = new RotateIMGn(mn);
JFrame frame = new JFrame();
frame.setTitle("Rotate Panel");
frame.setContentPane(test);
frame.pack();
frame.setVisible(true);
}
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = RotateIMGn.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
}