JAVA实现图片裁剪

/**
     * 裁剪图片
     * @param src 源图片
     * @param dest 裁剪后的图片
     * @param x    裁剪范围的X坐标
     * @param y 裁剪范围的Y坐标
     * @param w 裁剪范围的高度
     * @param h 裁剪范围的宽度
     * @param destW 裁剪后图片的宽度
     * @param destH 裁剪后图片的高度
     * @throws IOException
     */
    public static void cutImage(String src, String dest, int x, int y, int w,
            int h,int destW,int destH) throws IOException {
        try{
            
            //未知问题，不知道为啥路径的最后会有\r\n
            
            src = src.replace("\r\n", "");
            dest = dest.replace("\r\n", "");
            System.out.println("CutImage:src=" + src + ";dest=" + dest + ";x=" + x + ";y=" + y);
            File file = new File(src);
            if(file.exists()){
                Iterator<ImageReader> iterator = ImageIO.getImageReadersByFormatName("jpg");
                ImageReader reader = (ImageReader) iterator.next();
                InputStream in = new FileInputStream(src);
                ImageInputStream iis = ImageIO.createImageInputStream(in);
                reader.setInput(iis, true);
                ImageReadParam param = reader.getDefaultReadParam();
                Rectangle rect = new Rectangle(x, y, w, h);
                param.setSourceRegion(rect);
                BufferedImage bi = reader.read(0, param);
                if(w != destW){ //被拉伸或者缩小过
                    bi.flush();
                    BufferedImage newImage = new BufferedImage(destW,destH,bi.getType());
                    Graphics g = newImage.getGraphics();
                    g.drawImage(bi,0,0,destW,destH,null,null);
                    g.dispose();
                    ImageIO.write(newImage, "jpg", new File(dest));
                }else{
                    ImageIO.write(bi, "jpg", new File(dest));
                }
                iis.close();
                in.close();
                //最后删除临时文件
                file.delete();
            }else{
                System.out.println("找不到要裁剪的文件：FileName=" + src);
            }
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }