Java BufferedImage转换为MultipartFile

引入依赖：
 <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>5.3.2</version>
        <scope>compile</scope>
    </dependency>
try {
 			//读取图片转换为 BufferedImage
            BufferedImage image = ImageIO.read(new FileInputStream("F:/test/pic1.jpg"));
            //调整图片大小后的BufferedImage。resizeImage方法是调整图片大小的可参考文章开头我上一篇文章
            BufferedImage newImage = ImageUtils.resizeImage(image, 200, 200);
            //将newImage写入字节数组输出流
			ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write( newImage, "jpg", baos );
            
			//转换为MultipartFile 
            MultipartFile multipartFile = new MockMultipartFile("pic1.jpg", baos.toByteArray());
       } catch (IOException e) {
            e.printStackTrace();
       }