ImageIO 操作图片

/**
* 读取本地图片到另一个本地文件夹
* @throws IOException
*/
public void copeImageToOtherFolder() throws IOException {
File file = new File(imgPath+"img_1.jpg");
Image image = ImageIO.read(file);

BufferedImage bufferedImage = new BufferedImage(image.getWidth(null),image.getHeight(null),BufferedImage.TYPE_INT_RGB);

/**下面这个是画板*/
Graphics g = bufferedImage.getGraphics();
// Image x坐标 y坐标 图片宽度 图片高度 **
g.drawImage(image,0,0,image.getWidth(null),image.getHeight(null),null);
g.dispose();

ImageIO.write(bufferedImage,"png",new File(imgPath+"new\\"+ UUID.randomUUID().toString().substring(0,8)+".png"));
}

/**
* 获取ImageIO读取和写取的图片格式
*/
public void formatImageName(){
String[] str = ImageIO.getReaderFormatNames();
//可读取的图片格式
System.out.println(Arrays.asList(str));//[BMP, bmp, jpg, JPG, wbmp, jpeg, png, PNG, JPEG, WBMP, GIF, gif]
//可写的图片格式
String[] str1 = ImageIO.getWriterFormatNames();
System.out.println(Arrays.asList(str1));//[BMP, bmp, jpg, JPG, wbmp, jpeg, png, PNG, JPEG, WBMP, GIF, gif]
}