java中Byte数组与图片的转换-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_2680/article/details/82335051

本文介绍了一种使用Java进行图像处理的方法，包括将图像文件读取为字节数组，并从字节数组还原为图像文件的过程。通过BufferedImage类和ImageIO工具，实现了图像的读写操作。

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package com.image;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.Iterator;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.FileImageInputStream;
import javax.imageio.stream.FileImageOutputStream;


public class ImageWithByte {

	 public static  byte[] image2Bytes(String imagePath) throws Exception {
		 BufferedImage bu=ImageIO.read(new File(imagePath));
	     ByteArrayOutputStream imageStream = new ByteArrayOutputStream();
	     try {
	         boolean resultWrite = ImageIO.write(bu, "jpg", imageStream);
	     } catch (Exception e) {
	      	 e.printStackTrace();
	     }
	     imageStream.flush();
	     byte[] tagInfo = imageStream.toByteArray();

	     return tagInfo;
	    } 

	public static void main(String[] args) throws Exception {
	        byte[]info=image2Bytes("D:/我的文档/美女.jpg");
	        ByteArrayInputStream imageStream = new ByteArrayInputStream(info);
	        BufferedImage image=ImageIO.read(imageStream);
	        String newFilePath="d:/我的文档/图片收藏/美女.jpg";	        
	        ImageIO.write(image, "jpg", new File(newFilePath));

	   }
}