package iis.utils;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import java.util.Base64;

public class ImageUtil {

	/**
	 * 解密
	 * 
	 * @param imageString
	 * @return
	 */
	public static BufferedImage decodeToImage(String imageString) {

		BufferedImage image = null;
		byte[] imageByte;
		try {
			imageByte = Base64.getDecoder().decode(imageString);
			ByteArrayInputStream bis = new ByteArrayInputStream(imageByte);
			image = ImageIO.read(bis);
			bis.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return image;
	}

	/**
	 * 加密
	 * 
	 * @param image
	 * @param type
	 * @return
	 */
	public static String encodeToString(BufferedImage image, String type) {
		String imageString = null;
		ByteArrayOutputStream bos = new ByteArrayOutputStream();

		try {
			ImageIO.write(image, type, bos);
			byte[] imageBytes = bos.toByteArray();
			imageString = Base64.getEncoder().encodeToString(imageBytes);

			bos.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return imageString;
	}
}