ImageIO图片转换错误

使用JDK5带的ImageIO进行图片格式转换发现有些图片转换失败,原转换代码为

  public static boolean convert(String srcFilePath, String destFilePath) throws IOException{
    BufferedImage image = ImageIO.read(new File(srcFilePath));
    return ImageIO.write(image, IMAGE_TYPE, new File(destFilePath));
  }

我在PNG转换BMP时发现原图type=BufferedImage.TYPE_CUSTOM时转换失败,把代码改为:

  public static boolean convert(String srcFilePath, String destFilePath) throws IOException{
    BufferedImage image = ImageIO.read(new File(srcFilePath));
	  if(!ImageIO.write(image,   IMAGE_TYPE,   new   File(destFilePath))){
		  BufferedImage img = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
		  img.getGraphics().drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);
		  return ImageIO.write(img,   IMAGE_TYPE,   new   File(destFilePath));
	  }
    return true;
  }

就好了