1 /**
2 * 裁剪图片
3 * @param src 源图片
4 * @param dest 裁剪后的图片
5 * @param x 裁剪范围的X坐标
6 * @param y 裁剪范围的Y坐标
7 * @param w 裁剪范围的高度
8 * @param h 裁剪范围的宽度
9 * @param destW 裁剪后图片的宽度
10 * @param destH 裁剪后图片的高度
11 * @throws IOException
12 */
13 public static void cutImage(String src, String dest, int x, int y, int w,
14 int h,int destW,int destH) throws IOException {
15 try{
16
17 //未知问题，不知道为啥路径的最后会有\r\n
18
19 src = src.replace("\r\n", "");
20 dest = dest.replace("\r\n", "");
21 System.out.println("CutImage:src=" + src + ";dest=" + dest + ";x=" + x + ";y=" + y);
22 File file = new File(src);
23 if(file.exists()){
24 Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName("jpg");
25 ImageReader reader = (ImageReader) iterator.next();
26 InputStream in = new FileInputStream(src);
27 ImageInputStream iis = ImageIO.createImageInputStream(in);
28 reader.setInput(iis, true);
29 ImageReadParam param = reader.getDefaultReadParam();
30 Rectangle rect = new Rectangle(x, y, w, h);
31 param.setSourceRegion(rect);
32 BufferedImage bi = reader.read(0, param);
33 if(w != destW){ //被拉伸或者缩小过
34 bi.flush();
35 BufferedImage newImage = new BufferedImage(destW,destH,bi.getType());
36 Graphics g = newImage.getGraphics();
37 g.drawImage(bi,0,0,destW,destH,null,null);
38 g.dispose();
39 ImageIO.write(newImage, "jpg", new File(dest));
40 }else{
41 ImageIO.write(bi, "jpg", new File(dest));
42 }
43 iis.close();
44 in.close();
45 //最后删除临时文件
46 file.delete();
47 }else{
48 System.out.println("找不到要裁剪的文件：FileName=" + src);
49 }
50 }catch(Exception ex){
51 ex.printStackTrace();
52 }
53 }
