java圖片縮放剪切處理

package action;

import java.awt.Graphics;

import java.awt.Image;

import java.awt.Toolkit;

import java.awt.image.BufferedImage;

import java.awt.image.CropImageFilter;

import java.awt.image.FilteredImageSource;

import java.awt.image.ImageFilter;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;
import javax.imageio.ImageIO;
import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class ImageProcess {

/**  
 * 對圖片進行縮放  
 *   
 * @param srcImgFileName  
 * @throws IOException  
 */  
public void zoomImage(String srcImgFileName) throws IOException {   
    // 讀入文件   
    File _file = new File(srcImgFileName);   
    // 構造Image對象   
    BufferedImage src = javax.imageio.ImageIO.read(_file);   
    int width = src.getWidth();   
    int height = src.getHeight();   

    // 邊長縮小為二分之一   
    BufferedImage tag = new BufferedImage(width / 2, height / 2, BufferedImage.TYPE_INT_RGB);   
    // 繪制縮小后的圖   
    tag.getGraphics().drawImage(src, 0, 0, width / 2, height / 2, null);   
    FileOutputStream out = new FileOutputStream("D:\\test1\\targetIMG1-4.jpg");   
    JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);   
    encoder.encode(tag);   
    out.close();   

    // 邊長擴大為2倍   
    tag = new BufferedImage(width * 2, height * 2, BufferedImage.TYPE_INT_RGB);   
    tag.getGraphics().drawImage(src, 0, 0, width * 2, height * 2, null);   
    out = new FileOutputStream("D:\\test1\\targetIMGx2.jpg");   
    encoder = JPEGCodec.createJPEGEncoder(out);   
    encoder.encode(tag);   
    out.close();   

}   

/**  
 * 將圖片分成九塊  
 *   
 * @param srcImageFile  
 * @throws IOException  
 */  
public void cut(String srcImageFile) throws IOException {   
    Image img;   
    ImageFilter cropFilter;   
    String dir = null;   
    // 讀取源圖像   
    BufferedImage src = ImageIO.read(new File(srcImageFile));   
    int destWidth = src.getWidth() / 3;   
    int destHeight = src.getHeight() / 3;   
    // 循環   
    for (int i = 0; i < 3; i++) {   
        for (int j = 0; j < 3; j++) {   
            // 四個參數分別為圖像起點坐標和寬高   
            cropFilter = new CropImageFilter(j * destWidth, i * destHeight, destWidth, destHeight);   
            img = Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(src.getSource(), cropFilter));   
            BufferedImage tag = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB);   
            Graphics g = tag.getGraphics();   
            g.drawImage(img, 0, 0, null); // 繪制小圖   
            g.dispose();   
            // 輸出為文件   
            dir = "D:\\test1\\cut_image_" + i + "_" + j + ".jpg";   
            File f = new File(dir);   
            ImageIO.write(tag, "JPEG", f);   
        }   
    }   
}   

public static void main(String[] args) throws IOException {   
    String imgFileName = "D:\\test\\test.png";   
    ImageProcess iZoom = new ImageProcess();   

    iZoom.zoomImage(imgFileName);   
    iZoom.cut(imgFileName);   
}   

}  </pre>