高手门，帮帮我？？？

[tondayong1981]

接http://community.csdn.net/Expert/topic/4046/4046024.xml?temp=.675625
下面是改进后的程序，也可在上面的网页回复。
我基本功能已完善了，但是就打开不对，还有旋转有点问题
大家帮我看看，其他不要管，只要看
button1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
JFileChooser chooser=new JFileChooser();
chooser.setCurrentDirectory(new File("."));
final ExtensionFileFilter filter=new ExtensionFileFilter();
filter.addExtension("jpg");
filter.addExtension("jpeg");
filter.addExtension("gif");
filter.setdescription("Image Files");
chooser.setFileFilter(filter);
int result=chooser.showOpenDialog(dp);
if(result==JFileChooser.APPROVE_OPTION)
{
String name=chooser.getSelectedFile().getPath();
img=Toolkit.getDefaultToolkit().getImage(name);
dp.repaint();
}

}
还有rotate函数，看哪儿有错，对于打开图片，我每次打开图片，panel就显示这张图片，以后的处理就是这张图片。谢谢大家了
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.filechooser.FileFilter;
import java.awt.image.*;
import java.awt.geom.AffineTransform;
import java.io.*;
import java.util.ArrayList;
import java.awt.image.ConvolveOp;
import java.awt.Point;
import java.awt.geom.*;

public class ImageViewer extends JFrame
{
private Image img;
private JButton button1,button2,button3,button4,button5,button6,button7,button8;
private JPanel panel;
Container c;
DrawPanel dp;
public boolean start=false;
public int flag=0;



public ImageViewer()
{
super("ImageViewer");
c=getContentPane();
panel=new JPanel();
dp=new DrawPanel();
c.add(dp,BorderLayout.CENTER);

MouseHandler handler=new MouseHandler(dp);
dp.addMouseMotionListener(handler);
dp.addMouseListener(handler);

button1=new JButton("打开");
panel.add(button1);
//dp.img=Toolkit.getDefaultToolkit().getImage("aa.jpg");

button1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
JFileChooser chooser=new JFileChooser();
chooser.setCurrentDirectory(new File("."));
final ExtensionFileFilter filter=new ExtensionFileFilter();
filter.addExtension("jpg");
filter.addExtension("jpeg");
filter.addExtension("gif");
filter.setdescription("Image Files");
chooser.setFileFilter(filter);
int result=chooser.showOpenDialog(dp);
if(result==JFileChooser.APPROVE_OPTION)
{
String name=chooser.getSelectedFile().getPath();
img=Toolkit.getDefaultToolkit().getImage(name);
dp.repaint();
}

}
});




button2=new JButton("缩放");
panel.add(button2);
button2.addActionListener(new Handler2());


button3=new JButton("翻转");
panel.add(button3);
button3.addActionListener(new Handler3());



button4=new JButton("移动");
panel.add(button4);
button4.addActionListener(new Handler4());


button5=new JButton("还原");
panel.add(button5);
button5.addActionListener(new Handler5());

button6=new JButton("边缘");
panel.add(button6);
button6.addActionListener(new Handler6());

button7=new JButton("画图");
panel.add(button7);
button7.addActionListener(new Handler7());


button8=new JButton("退出");
panel.add(button8);
button8.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});



c.add(panel,BorderLayout.SOUTH);



setSize(550,350);
show();
}




private class Handler2 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String str=JOptionPane.showInputDialog(null,"Please input zoom factor","Message",1);
System.out.println(str);
if((str==null)||(str.length()==0))
JOptionPane.showMessageDialog(null,"The data cannot be null","Message",1);
else
dp.zoom(Double.parseDouble(str));

}
}



private class Handler3 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String str=JOptionPane.showInputDialog(null,"Please input flip angle","Message",1);
if((str==null)||(str.length()==0))
JOptionPane.showMessageDialog(null,"The data cannot be null","Message",1);
else
dp.rotate(Integer.parseInt(str));
}
}




private class Handler4 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.flag=3;
}
}


private class Handler5 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.OriginalImage();
}
}


private class Handler6 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.Edge();
}
}


private class Handler7 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.flag=5;
}
}
private static class ExtensionFileFilter extends FileFilter
{
private String description="";
private ArrayList extensions=new ArrayList();
public void addExtension(String extension)
{
if(!extension.startsWith("."))
extension="."+extension;
extensions.add(extension.toLowerCase());
}


public void setdescription(String aDescription)
{
description=aDescription;
}

public String getDescription()
{
return description;
}

[tondayong1981]

接上
public boolean accept(File f)
{
if(f.isDirectory())
return true;
String name=f.getName().toLowerCase();
for(int i=0;i<extensions.size();i++)
if(name.endsWith((String)extensions.get(i)))
return true;
return false;

}
}



public static void main(String[] args)
{
ImageViewer app=new ImageViewer();
app.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}

}



class MouseHandler extends MouseInputAdapter
{

private Point currentPos,lastPos;
private DrawPanel drawpanel;
public MouseHandler(DrawPanel panel)
{
this.drawpanel=panel;
}
public void mousePressed(MouseEvent e)
{
currentPos=e.getPoint();
lastPos=e.getPoint();
drawpanel.drawIt(lastPos,currentPos);

}


public void mouseDragged(MouseEvent e)
{

currentPos=e.getPoint();
drawpanel.drawIt(lastPos,currentPos);
lastPos=currentPos;

}
}

class DrawPanel extends JPanel
{

public Image img;
BufferedImage bi,bi1,bi2,biEdge,bimg,buffer;
int newX=400,newY=400;
int flag=0;
int x, y;
private Point currentPos,lastPos;
MouseHandler mousehandler;
Graphics2D bufferG;
public DrawPanel()
{
img=Toolkit.getDefaultToolkit().getImage("aa.jpg");
this.addMouseMotionListener(new MouserMotionHandler());
MediaTracker mt=new MediaTracker(this);
mt.addImage(img,1);
try
{
mt.waitForAll();
}catch(Exception e)
{
System.out.println("Exception While Loading.");
}
if(img.getWidth(this)==-1)
{
System.out.println("***make sure you have the textture image"+"*.jpg file in the same directory.***");
System.exit(0);

}
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
bi=new BufferedImage(img.getWidth(this),img.getHeight(this),BufferedImage.TYPE_INT_ARGB);
Graphics2D big=bi.createGraphics();
big.drawImage(img,0,0,this);
bi1=bi;
bi2=bi;
biEdge=bi;
}



private class MouserMotionHandler extends MouseMotionAdapter
{
public void mouseDragged(MouseEvent e)
{
x=e.getX();
y=e.getY();
repaint();

}
}





public void zoom(double factor)
{
int w=img.getWidth(this);
int h=img.getHeight(this);

newX=(int)(w*factor);
newY=(int)(h*factor);

bi1=new BufferedImage(newX,newY,BufferedImage.TYPE_INT_ARGB);
Graphics2D big=bi1.createGraphics();
big.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
big.drawImage(img,0,0,newX,newY,this);
repaint();
flag=1;

}


public void rotate(int degree)
{
int angle=degree%360;
int w=img.getWidth(this);
int h=img.getHeight(this);
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
bi2=new BufferedImage(bi.getWidth(this),bi.getHeight(this),BufferedImage.TYPE_INT_ARGB);
Graphics2D big1=bi2.createGraphics();
AffineTransform at=new AffineTransform();
at.translate(w/10,h/10);
at.rotate(Math.toRadians(angle));
big1.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
big1.drawImage(img,at,this);
repaint();
flag=2;


}

public void OriginalImage()
{
flag=0;
repaint();
}



public void drawIt(Point lastPos,Point currentPos)
{
this.currentPos=currentPos;
this.lastPos=lastPos;
repaint();
}



public void Edge()
{
float elements[]={0.0f,-1.0f,0.0f,-1.0f,4.0f,-1.0f,0.0f,-1.0f,0.0f};
int w=img.getWidth(this);
int h=img.getHeight(this);
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
biEdge=new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
Graphics2D bigEdge=biEdge.createGraphics();
bigEdge.drawImage(img,0,0,this);
BufferedImageOp biop=null;
AffineTransform at=new AffineTransform();
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
bimg=new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
Kernel kernel=new Kernel(3,3,elements);
ConvolveOp cop=new ConvolveOp(kernel,ConvolveOp.EDGE_NO_OP,null);
cop.filter(biEdge,bimg);
biop=new AffineTransformOp(at,AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
repaint();
flag=4;
}

public void paintComponent(Graphics g)
{

super.paintComponent(g);
Graphics2D g2D=(Graphics2D)g;
if(flag==0)
g2D.drawImage(bi,0,0,this);
else if(flag==1)
g2D.drawImage(bi1,0,0,this);
else if(flag==2)
g2D.drawImage(bi2,0,0,this);
else if(flag==3)
g2D.drawImage(bi,x,y,this);
else if(flag==4)
g2D.drawImage(bimg,0,0,this);
else if(flag==5)
{
if(buffer==null)
{
buffer=(BufferedImage)this.createImage(this.getWidth(),this.getHeight());
bufferG=buffer.createGraphics();
}

if(currentPos!=null && lastPos!=null)
bufferG.draw(new Line2D.Double(lastPos,currentPos));
g2D.drawImage(buffer,0,0,this);
//System.out.println(currentPos+""+lastPos);

}

}
}

[tondayong1981]

大家把程序拷贝，名称为ImageViewer.java运行一下，就知道改哪儿了

[mygia]

帮忙顶！

[treeroot]

帮你顶一下

[wyplay]

帮顶。。

[humanity]

像20 前村里有露天电影一样 , 搬凳子

( 粘下来都麻烦,还要找另一个贴子, 就算我拿下也不一定看懂. ) .

[tondayong1981]

不需要了，我全部拷到这个文件下了，从
谢谢大家了
import java.awt.*;
往下拷就对了。

[tondayong1981]

http://community.csdn.net/Expert/topic/4046/4046024.xml?temp=.675625
我已经删除了，因为没人回，我把文件已全部拷到此文件中，从import 语句拷贝名称为ImageViewer.java运行一下就行了，在文件的class文件中放上一张图片。名称为aa.jpg

[tondayong1981]

下面是改好的，
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.filechooser.FileFilter;
import java.awt.image.*;
import java.awt.geom.AffineTransform;
import java.io.*;
import java.util.ArrayList;
import java.awt.image.ConvolveOp;
import java.awt.Point;
import java.awt.geom.*;

public class ImageViewer extends JFrame
{
private Image img;
private JButton button1,button2,button3,button4,button5,button6,button7,button8;
private JPanel panel;
Container c;
DrawPanel dp;
public boolean start=false;
public int flag=0;
String name="F:\\aa.jpg";



public ImageViewer()
{
super("ImageViewer");
c=getContentPane();
panel=new JPanel();
dp=new DrawPanel(name);
c.add(dp,BorderLayout.CENTER);

final MouseHandler handler=new MouseHandler(dp);
dp.addMouseMotionListener(handler);
dp.addMouseListener(handler);

button1=new JButton("打开");
panel.add(button1);
//dp.img=Toolkit.getDefaultToolkit().getImage("aa.jpg");

button1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
JFileChooser chooser=new JFileChooser();
chooser.setCurrentDirectory(new File("."));
final ExtensionFileFilter filter=new ExtensionFileFilter();
filter.addExtension("jpg");
filter.addExtension("jpeg");
filter.addExtension("gif");
filter.setdescription("Image Files");
chooser.setFileFilter(filter);
int result=chooser.showOpenDialog(dp);
if(result==JFileChooser.APPROVE_OPTION)
{
name=chooser.getSelectedFile().getPath();
getContentPane().remove(dp);
removeMouseListener(handler);
dp = new DrawPanel(name);
getContentPane().add(dp, BorderLayout.CENTER);
MouseHandler handler=new MouseHandler(dp);
dp.addMouseMotionListener(handler);
dp.addMouseListener(handler);
dp.revalidate();


}

}
});




button2=new JButton("缩放");
panel.add(button2);
button2.addActionListener(new Handler2());


button3=new JButton("翻转");
panel.add(button3);
button3.addActionListener(new Handler3());



button4=new JButton("移动");
panel.add(button4);
button4.addActionListener(new Handler4());


button5=new JButton("还原");
panel.add(button5);
button5.addActionListener(new Handler5());

button6=new JButton("边缘");
panel.add(button6);
button6.addActionListener(new Handler6());

button7=new JButton("画图");
panel.add(button7);
button7.addActionListener(new Handler7());


button8=new JButton("退出");
panel.add(button8);
button8.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});



c.add(panel,BorderLayout.SOUTH);



setSize(550,350);
show();
}




private class Handler2 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String str=JOptionPane.showInputDialog(null,"Please input zoom factor","Message",1);
System.out.println(str);
if((str==null)||(str.length()==0))
JOptionPane.showMessageDialog(null,"The data cannot be null","Message",1);
else
dp.zoom(Double.parseDouble(str));

}
}



private class Handler3 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String str=JOptionPane.showInputDialog(null,"Please input flip angle","Message",1);
if((str==null)||(str.length()==0))
JOptionPane.showMessageDialog(null,"The data cannot be null","Message",1);
else
dp.rotate(Integer.parseInt(str));
}
}




private class Handler4 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.flag=3;
}
}


private class Handler5 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.OriginalImage();
}
}


private class Handler6 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.Edge();
}
}


private class Handler7 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
dp.flag=5;
}
}
private static class ExtensionFileFilter extends FileFilter
{
private String description="";
private ArrayList extensions=new ArrayList();
public void addExtension(String extension)
{
if(!extension.startsWith("."))
extension="."+extension;
extensions.add(extension.toLowerCase());
}


public void setdescription(String aDescription)
{
description=aDescription;
}

public String getDescription()
{
return description;
}

public boolean accept(File f)
{
if(f.isDirectory())
return true;
String name=f.getName().toLowerCase();
for(int i=0;i<extensions.size();i++)
if(name.endsWith((String)extensions.get(i)))
return true;
return false;

}
}

[tondayong1981]

public static void main(String[] args)
{
ImageViewer app=new ImageViewer();
app.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}

}



class MouseHandler extends MouseInputAdapter
{

private Point currentPos,lastPos;
private DrawPanel drawpanel;
public MouseHandler(DrawPanel panel)
{
this.drawpanel=panel;
}
public void mousePressed(MouseEvent e)
{
currentPos=e.getPoint();
lastPos=e.getPoint();
drawpanel.drawIt(lastPos,currentPos);

}


public void mouseDragged(MouseEvent e)
{

currentPos=e.getPoint();
drawpanel.drawIt(lastPos,currentPos);
lastPos=currentPos;

}
}

class DrawPanel extends JPanel
{

public Image img;
BufferedImage bi,bi1,bi2,biEdge,bimg,buffer;
int newX=400,newY=400;
int flag=0;
int x, y;
private Point currentPos,lastPos;
MouseHandler mousehandler;
Graphics2D bufferG;
public DrawPanel(String name)
{
img=Toolkit.getDefaultToolkit().getImage(name);
this.addMouseMotionListener(new MouserMotionHandler());
MediaTracker mt=new MediaTracker(this);
mt.addImage(img,1);
try
{
mt.waitForAll();
}catch(Exception e)
{
System.out.println("Exception While Loading.");
}
if(img.getWidth(this)==-1)
{
System.out.println("***make sure you have the textture image"+"*.jpg file in the same directory.***");
System.exit(0);

}
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
bi=new BufferedImage(img.getWidth(this),img.getHeight(this),BufferedImage.TYPE_INT_ARGB);
Graphics2D big=bi.createGraphics();
big.drawImage(img,0,0,this);
bi1=bi;
bi2=bi;
biEdge=bi;
}



private class MouserMotionHandler extends MouseMotionAdapter
{
public void mouseDragged(MouseEvent e)
{
x=e.getX();
y=e.getY();
repaint();

}
}





public void zoom(double factor)
{
int w=img.getWidth(this);
int h=img.getHeight(this);

newX=(int)(w*factor);
newY=(int)(h*factor);

bi1=new BufferedImage(newX,newY,BufferedImage.TYPE_INT_ARGB);
Graphics2D big=bi1.createGraphics();
big.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
big.drawImage(img,0,0,newX,newY,this);
repaint();
flag=1;

}


public void rotate(int degree)
{
int angle=degree%360;
int w=img.getWidth(this);
int h=img.getHeight(this);
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
bi2=new BufferedImage(bi.getWidth(this),bi.getHeight(this),BufferedImage.TYPE_INT_ARGB);
Graphics2D big1=bi2.createGraphics();
AffineTransform at=new AffineTransform();
at.translate(w/10,h/10);
at.rotate(Math.toRadians(angle));
big1.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
big1.drawImage(img,at,this);
repaint();
flag=2;


}

public void OriginalImage()
{
flag=0;
repaint();
}



public void drawIt(Point lastPos,Point currentPos)
{
this.currentPos=currentPos;
this.lastPos=lastPos;
repaint();
}



public void Edge()
{
float elements[]={0.0f,-1.0f,0.0f,-1.0f,4.0f,-1.0f,0.0f,-1.0f,0.0f};
int w=img.getWidth(this);
int h=img.getHeight(this);
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
biEdge=new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
Graphics2D bigEdge=biEdge.createGraphics();
bigEdge.drawImage(img,0,0,this);
BufferedImageOp biop=null;
AffineTransform at=new AffineTransform();
if(img.getWidth(this)!=0 && img.getHeight(this)!=0)
bimg=new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
Kernel kernel=new Kernel(3,3,elements);
ConvolveOp cop=new ConvolveOp(kernel,ConvolveOp.EDGE_NO_OP,null);
cop.filter(biEdge,bimg);
biop=new AffineTransformOp(at,AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
repaint();
flag=4;
}

public void paintComponent(Graphics g)
{

super.paintComponent(g);
Graphics2D g2D=(Graphics2D)g;
if(flag==0)
g2D.drawImage(bi,0,0,this);
else if(flag==1)
g2D.drawImage(bi1,0,0,this);
else if(flag==2)
g2D.drawImage(bi2,0,0,this);
else if(flag==3)
g2D.drawImage(bi,x,y,this);
else if(flag==4)
g2D.drawImage(bimg,0,0,this);
else if(flag==5)
{
if(buffer==null)
{
buffer=(BufferedImage)this.createImage(this.getWidth(),this.getHeight());
bufferG=buffer.createGraphics();
}

if(currentPos!=null && lastPos!=null)
bufferG.draw(new Line2D.Double(lastPos,currentPos));
g2D.drawImage(buffer,0,0,this);

}

}
}

[DanielYWoo]

旋转好像没问题，我给你发短信了，你可以打开文件了吧？

[DanielYWoo]

改动一下DrawPanel的构造函数，每次换图片把你的DrawPanel重新创建一个不就行了
if(result==JFileChooser.APPROVE_OPTION) {
String name=chooser.getSelectedFile().getPath();
getContentPane().remove(dp);
dp = new DrawPanel(name);
getContentPane().add(dp, BorderLayout.CENTER);
dp.revalidate();
}

不过你的代码的action listener也要改动...
代码结构太乱了，虽然这样可以更换图片了，但是可能action listener有问题，自己refactor一下吧

[prok]

顶一下