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Java将图片转为Base64

import net.coobird.thumbnailator.Thumbnails;
import org.apache.commons.codec.binary.Base64;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;


 /**
     * 文件BufferedImage类型转BASE64
     *
     * @param bufferedImage
     * @return
     */
    public static String imageToBase64(BufferedImage bufferedImage) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();//io流
        try {
            ImageIO.write(bufferedImage, "png", baos);//写入流中
        } catch (IOException e) {
            e.printStackTrace();
        }
        byte[] bytes = baos.toByteArray();//转换成字节
        BASE64Encoder encoder = new BASE64Encoder();
        String png_base64 = encoder.encodeBuffer(bytes).trim();//转换成base64串
        png_base64 = png_base64.replaceAll("\n", "").replaceAll("\r", "");//删除 \r\n
        return "data:image/png;base64," + png_base64;
    }

    /**
     * 文件File类型转BASE64
     *
     * @param file
     * @return
     */
    public static String fileToBase64(File file) {
        return "data:image/png;base64," + Base64.encodeBase64String(fileToByte(file));
    }

    /**
     * 文件File类型转byte[]
     *
     * @param file
     * @return
     */
    private static byte[] fileToByte(File file) {
        byte[] fileBytes = null;
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(file);
            fileBytes = new byte[(int) file.length()];
            fis.read(fileBytes);
            fis.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return fileBytes;
    }