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();
         }
     }

cutImage