java能不能把图片做出圆角来?

Question

RT,现在有张图片,我想用JAVA图形编程把图片处理下,做个圆角效果,不知道怎么做,希望牛人指点!

Answer 1

用一个圆角矩形设置个path！然后画图！！！应该就行 ！！只是个思路！！晚上回来做下！！

Answer 2

import java.awt.event.ActionListener;
import java.awt.geom.GeneralPath;
//import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
//import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
//import javax.swing.JTextArea;
//import javax.swing.JTextPane;
import javax.swing.filechooser.FileNameExtensionFilter;
public class GeneralPathRect 
{ /**
 * @param args
 */
public static void main(String[] args) 
{
new GeneralPathRectFrame(); }}
class GeneralPathRectFrame extends JFrame
{

private static final long serialVersionUID = 1L;
private GeneralPath path=new GeneralPath();
BufferedImage image;
JFileChooser chooser=new JFileChooser();

JMenuBar bar=new JMenuBar();
JPanel panel=new drawPanel();
public GeneralPathRectFrame()
{
setSize(400,400);

JMenu file=new JMenu("file");
JMenuItem openItem=new JMenuItem("导入图片");

openItem.addActionListener(new ActionListener()
{ @Override
public void actionPerformed(ActionEvent arg0) 
{
// TODO Auto-generated method stub
chooser.setCurrentDirectory(new File("."));
String []suffiex=ImageIO.getReaderFileSuffixes();
chooser.setFileFilter(new FileNameExtensionFilter("Image file",suffiex));
int ans=chooser.showOpenDialog(GeneralPathRectFrame.this);
if(ans==JFileChooser.APPROVE_OPTION)
{
try 
{
image=ImageIO.read(chooser.getSelectedFile());
repaint();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}});
file.add(openItem);
//pane.insertComponent(area);
add(panel);

bar.add(file);
setJMenuBar(bar);
setVisible(true);
}
class drawPanel extends JPanel
{

private static final long serialVersionUID = 1L; public void paint(Graphics g)
{
Graphics2D g2=(Graphics2D)g;
if(image!=null)
{
int width=image.getWidth(),height=image.getHeight();
RoundRectangle2D rect=new RoundRectangle2D.Double(0,0,width,height,20,20);
path.append(rect,false);
g2.setClip(path);
g2.drawImage(image,0,0,null);
}
else g.drawString("nihoa",0,0);
}
}

}