如何在Java中将byte []转换为BufferedImage

落日映苍穹つ 2023-02-15 07:50 11阅读 0赞

从`byte[]`到`BufferedImage`的转换涉及`InputStream`和`ImageIO.read`的使用，如下所示：

InputStream in = new ByteArrayInputStream(imageInByte);
    BufferedImage bImageFromConvert = ImageIO.read(in);

以下示例将读取一个名为“ *darksouls.jpg* ”的图像文件，将其转换为字节数组，然后重新使用转换后的字节数组，并将其转换回新的`BufferedImage` ，然后将其保存回新的名称“ *new-darksouls .jpg* ”。

package com.mkyong.image;
    
    import java.awt.image.BufferedImage;
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.IOException;
    import java.io.InputStream;
    import javax.imageio.ImageIO;
    
    public class ImageTest {
    
    	public static void main(String[] args) {
    
    		try {
    
    			byte[] imageInByte;
    			BufferedImage originalImage = ImageIO.read(new File(
    					"c:/darksouls.jpg"));
    
    			// convert BufferedImage to byte array
    			ByteArrayOutputStream baos = new ByteArrayOutputStream();
    			ImageIO.write(originalImage, "jpg", baos);
    			baos.flush();
    			imageInByte = baos.toByteArray();
    			baos.close();
    
    			// convert byte array back to BufferedImage
    			InputStream in = new ByteArrayInputStream(imageInByte);
    			BufferedImage bImageFromConvert = ImageIO.read(in);
    
    			ImageIO.write(bImageFromConvert, "jpg", new File(
    					"c:/new-darksouls.jpg"));
    
    		} catch (IOException e) {
    			System.out.println(e.getMessage());
    		}
    	}
    }

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