怎样分割图片？？

一个拼图游戏，里面有你要用的方法，你自己找吧。用法：java RectJigsaw <图片文件名，包括路径>
比如：java RectJigsaw "C:\WINNT\Web\Wallpaper\Windows 2000.jpg"图片文件只能是gif或jpg// RectJigsaw.java
// author: unagainimport sun.awt.image.ToolkitImage;import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.awt.event.*;import java.util.*;import javax.swing.*;
import javax.swing.border.*;public class RectJigsaw
extends JPanel{
    final static int rowCount = 7;
    final static int colCount = 8;
    final static int HCTRL = 40;
    final static int HMARGIN = 50;
    final static int VMARGIN = 50;

    private BufferedImage bi;    static int imgWidth = 0, imgHeight = 0;
    static int cellWidth = 0, cellHeight = 0;

    static Vector<BufferedImage> images = new Vector<BufferedImage>();
    static Vector<Integer> imgOrder = new Vector<Integer>();    public RectJigsaw(String fn) {
        super();
        setBackground(Color.BLACK);
        setBorder(new BevelBorder(BevelBorder.LOWERED));        initCells(fn);
    }    private void initCells(String fn) {
        final Image img = Toolkit.getDefaultToolkit().getImage(fn);
        try {
            MediaTracker tracker = new MediaTracker(this);
            tracker.addImage(img, 0);
            tracker.waitForID(0);
        } catch (Exception e) {}        bi = ((ToolkitImage) img).getBufferedImage();                bi = roundImgBounds(bi);        Graphics2D g2 = (Graphics2D) bi.getGraphics();

        int x = 0;
        int y = 0;        cellWidth = bi.getWidth() / colCount;
        cellHeight = bi.getHeight() / rowCount;        g2.setColor(Color.WHITE);
        int k=0;        for (int row=0; row<rowCount; row++) {
            for (int col=0; col<colCount; col++) {
                g2.draw3DRect(
                    x + cellWidth * col,
                    y + cellHeight * row,
                    cellWidth - 2, cellHeight - 2, true);                imgOrder.add(k++);                images.add(
                    bi.getSubimage(
                        x + cellWidth * col,
                        y + cellHeight * row,
                        cellWidth, cellHeight));
            }
        }
        g2.setColor(Color.BLACK);
        for (int col=0; col < colCount; col++) {
            g2.drawLine(
                x + cellWidth*(col+1) - 1,
                y,
                x + cellWidth *(col+1) - 1,
                y + bi.getHeight() - 1);
        }        for (int row=0; row < rowCount; row++) {
            g2.drawLine(
                x,
                y + cellHeight*(row+1) - 1,
                x + bi.getWidth() - 1,
                y + cellHeight*(row+1) - 1);
        }    }
    public void paintComponent(Graphics g){
        super.paintComponent(g);        Graphics2D g2 = (Graphics2D) g;
        int orgX = (getWidth() - imgWidth) / 2;
        int orgY = (getHeight() - imgHeight) / 2;        int i = -1;        for (Integer index : imgOrder) {
            i ++;            int row = i / colCount;
            int col = i % colCount;            BufferedImage img = images.get(index.intValue());            g2.drawImage(
                img,
                orgX + col * cellWidth,
                orgY + row * cellHeight,
                this);
        }
    }    private BufferedImage roundImgBounds(BufferedImage bi) {        int height = bi.getHeight();
        int width = bi.getWidth();        float cellHeight = Math.round(height / 1.0 / rowCount);
        float cellWidth = Math.round(width / 1.0 / colCount);        AffineTransform at = new AffineTransform();        imgWidth = (int)cellWidth * colCount;
        imgHeight = (int)cellHeight * rowCount;        at.scale(imgWidth / width,
            imgHeight / height);        AffineTransformOp biop =
            new AffineTransformOp(at, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);        BufferedImage newbi = biop.filter(bi, null);

        return newbi;
    }    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
        } catch (Exception e) {
        }        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        final JPanel pane = new RectJigsaw(args[0]);
        JPanel ctrlPane = new JPanel();        ctrlPane.setBorder(new LineBorder(Color.DARK_GRAY));
        ctrlPane.add(
            new JButton(
                new AbstractAction("Restore"){
                    public void actionPerformed(ActionEvent e) {
                        Collections.sort(imgOrder);
                        pane.repaint();
                    }
        }));
        ctrlPane.add(
            new JButton(
                new AbstractAction("Shuffle") {
                    public void actionPerformed(ActionEvent e) {                        Collections.shuffle(imgOrder);
                        SwingUtilities.invokeLater(
                            new Runnable() {
                                public void run(){
                                    pane.repaint();
                                }
                        });                                            }
        }));        frame.getContentPane().add(pane, BorderLayout.CENTER);
        frame.getContentPane().add(ctrlPane, BorderLayout.PAGE_END);        ctrlPane.setPreferredSize(
            new Dimension(imgWidth + HMARGIN * 2, HCTRL));
        frame.setPreferredSize(
            new Dimension(imgWidth + HMARGIN * 2, imgHeight + VMARGIN * 2 + HCTRL));        frame.pack();
        frame.setVisible(true);
    }
}

import javax.swing.*;
import java.io.*;
import java.awt.image.BufferedImage;
import javax.imageio.*;import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;import java.awt.*;public class CutImage{
    //5个参数分别是原图，其实位置的x坐标，y坐标，结束位置的x坐标，y坐标，楼主可以根据需要改下
    public static BufferedImage cut(BufferedImage image,int leftTopX,int leftTopY,int rightBottomX,int rightBottomY){
         int length = rightBottomX-leftTopX;
int width = rightBottomY-leftTopX;
BufferedImage ima = new BufferedImage(length,width,BufferedImage.TYPE_INT_RGB);
Graphics g = ima.getGraphics();
g.drawImage(image,-leftTopX,-leftTopY,null);
return ima;
}
public static void main(String args[]) throws IOException{
File file = new File(".\\33.jpg");
BufferedImage image = ImageIO.read(file);
BufferedImage ima;
ima = CutImage.cut(image,40,30,70,80);
ImageIO.write(ima,"jpg",new File(".\\s.jpg"));
}
}

楼上的．为什么只可以转化为jpg，gif或其他文件类型怎么不可以啊？

java2D包好像只支持gif和jpg。
你需要打开什么类型的文件？你可以找一下sun的JAI软件包，可以处理各种图片。

嗯，刚看了API Spec，是可以处理png

sun8408() :
g.drawImage(image,-leftTopX,-leftTopY,null);
中的坐标用负数表示怎样理解？？为什么用正数就不可以呢？

调试易

怎样分割图片？？

解决方案 »