BufferedImage转换成InputStream的步骤

BufferedImage转换成InputStream的步骤

创建BufferedImage对象：首先，你需要有一个BufferedImage对象。可以从文件中读取，或者通过代码生成。

URL url = new URL(cell.getStringCellValue());

// 读取网络图片并将其转换为BufferedImage对象
BufferedImage image = ImageIO.read(url);
ByteArrayOutputStream os = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", os);
InputStream is = new ByteArrayInputStream(os.toByteArray());