如何在Java中将BufferedImage转换为byte []？

柔情只为你懂 2023-02-15 07:50 124阅读 0赞

通常，您需要将BufferedImage转换为字节数组，以便将图像存储到数据库或其他目的。 需要进行一些转换，如下所示：

BufferedImage originalImage = ImageIO.read(new File("c:\\image\\mypic.jpg"));
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ImageIO.write( originalImage, "jpg", baos );
    baos.flush();
    byte[] imageInByte = baos.toByteArray();
    baos.close();

## 例 ##

此类将从“ c：\\\\ image \\\\ mypic.jpg”加载图像，使用ImageIO.write将BufferedImage写入ByteArrayOutputStream对象，并将其转换为字节数组。

import java.awt.image.BufferedImage;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.IOException;
    import javax.imageio.ImageIO;
    
    /*
     * @author mkyong
     *
     */
    public class ImageTest {
    
       public static void main(String [] args){
    		
       try{
    			
    	BufferedImage originalImage = 
                                  ImageIO.read(new File("c:\\image\\mypic.jpg"));
    			
    	ByteArrayOutputStream baos = new ByteArrayOutputStream();
    	ImageIO.write( originalImage, "jpg", baos );
    	baos.flush();
    	byte[] imageInByte = baos.toByteArray();
    	baos.close();
    			
    	}catch(IOException e){
    		System.out.println(e.getMessage());
    	}		
       }	
    }

标记： [bufferedimage][] [图像][Link 1] [java][]

> 翻译自: [https://mkyong.com/java/how-to-convert-bufferedimage-to-byte-in-java/][https_mkyong.com_java_how-to-convert-bufferedimage-to-byte-in-java]

[bufferedimage]: https://mkyong.com/tag/bufferedimage/
[Link 1]: https://mkyong.com/tag/image/
[java]: https://mkyong.com/tag/java/
[https_mkyong.com_java_how-to-convert-bufferedimage-to-byte-in-java]: https://mkyong.com/java/how-to-convert-bufferedimage-to-byte-in-java/