Java圖片縮放剪切處理

Java圖片縮放剪切處理：

1. package action;     
2.     
3. import java.awt.Graphics;     
4. import java.awt.Image;     
5. import java.awt.Toolkit;     
6. import java.awt.image.BufferedImage;     
7. import java.awt.image.CropImageFilter;     
8. import java.awt.image.FilteredImageSource;     
9. import java.awt.image.ImageFilter;     
10. import java.io.File;     
11. import java.io.FileOutputStream;     
12. import java.io.IOException;     
13.     
14. import javax.imageio.ImageIO;     
15.     
16. import com.sun.image.codec.jpeg.JPEGCodec;     
17. import com.sun.image.codec.jpeg.JPEGImageEncoder;     
18.     
19. public class ImageProcess {     
20.     
21.     /**   
22.      * 對圖片進行縮放   
23.      *    
24.      * @param srcImgFileName   
25.      * @throws IOException   
26.      */    
27.     public void zoomImage(String srcImgFileName) throws IOException {     
28.         // 讀入文件      
29.         File _file = new File(srcImgFileName);     
30.         // 構造Image對象      
31.         BufferedImage src = javax.imageio.ImageIO.read(_file);     
32.         int width = src.getWidth();     
33.         int height = src.getHeight();     
34.     
35.         // 邊長縮小為二分之一      
36.         BufferedImage tag = new BufferedImage(width / 2, height / 2, BufferedImage.TYPE_INT_RGB);     
37.         // 繪制縮小後的圖      
38.         tag.getGraphics().drawImage(src, 0, 0, width / 2, height / 2, null);     
39.         FileOutputStream out = new FileOutputStream("D:\\test1\\targetIMG1-4.jpg");     
40.         JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);     
41.         encoder.encode(tag);     
42.         out.close();     
43.     
44.         // 邊長擴大為2倍      
45.         tag = new BufferedImage(width * 2, height * 2, BufferedImage.TYPE_INT_RGB);     
46.         tag.getGraphics().drawImage(src, 0, 0, width * 2, height * 2, null);     
47.         out = new FileOutputStream("D:\\test1\\targetIMGx2.jpg");     
48.         encoder = JPEGCodec.createJPEGEncoder(out);     
49.         encoder.encode(tag);     
50.         out.close();     
51.     
52.     }     
53.     
54.     /**   
55.      * 將圖片分成九塊   
56.      *    
57.      * @param srcImageFile   
58.      * @throws IOException   
59.      */    
60.     public void cut(String srcImageFile) throws IOException {     
61.         Image img;     
62.         ImageFilter cropFilter;     
63.         String dir = null;     
64.         // 讀取源圖像      
65.         BufferedImage src = ImageIO.read(new File(srcImageFile));     
66.         int destWidth = src.getWidth() / 3;     
67.         int destHeight = src.getHeight() / 3;     
68.         // 循環      
69.         for (int i = 0; i < 3; i++) {     
70.             for (int j = 0; j < 3; j++) {     
71.                 // 四個參數分別為圖像起點坐標和寬高      
72.                 cropFilter = new CropImageFilter(j * destWidth, i * destHeight, destWidth, destHeight);     
73.                 img = Toolkit.getDefaultToolkit().createImage(new FilteredImageSource(src.getSource(), cropFilter));     
74.                 BufferedImage tag = new BufferedImage(destWidth, destHeight, BufferedImage.TYPE_INT_RGB);     
75.                 Graphics g = tag.getGraphics();     
76.                 g.drawImage(img, 0, 0, null); // 繪制小圖      
77.                 g.dispose();     
78.                 // 輸出為文件      
79.                 dir = "D:\\test1\\cut_image_" + i + "_" + j + ".jpg";     
80.                 File f = new File(dir);     
81.                 ImageIO.write(tag, "JPEG", f);     
82.             }     
83.         }     
84.     }     
85.     
86.     public static void main(String[] args) throws IOException {     
87.         String imgFileName = "D:\\test\\test.png";     
88.         ImageProcess iZoom = new ImageProcess();     
89.     
90.         iZoom.zoomImage(imgFileName);     
91.         iZoom.cut(imgFileName);     
92.     }     
93. }