【Java】Base64码和图片之间相互转化

import java.io.*;
import java.util.Base64;



/**
 * Base64工具类
 * @Author: CcchenCoco
 * @Version: V1.0 Base64Util, 2022/3/30 8:50
 **/
public class Base64Util {

    /**
     * 图片转化成base64字符串
     * @Author: CcchenCoco
     * @Date: 2022/3/30 8:51
     * @Param:
     **/
    public static String getImageBase64(String imgPath) {
        // 待处理的图片
        String imgFile = imgPath;
        InputStream in = null;
        byte[] data = null;
        // 返回Base64编码过的字节数组字符串
        String encode = null;
        // 对字节数组Base64编码
        Base64.Encoder encoder = Base64.getEncoder();
        try {
            // 读取图片字节数组
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];
            in.read(data);
            encode = encoder.encodeToString(data);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return encode;
    }

    /**
     * base64字符串转化成图片
     * @Author: CcchenCoco
     * @Date: 2022/3/30 8:51
     * @Param:
     **/
    public static boolean base64ToImage(String imgData, String imgFilePath) {
        // 图像数据为空
        if (imgData == null)
            return false;
        Base64.Decoder decoder = Base64.getDecoder();
        OutputStream out = null;
        try {
            File img = new File(imgFilePath);
            img.setExecutable(true);
            // 文件路径不存在时创建路径
            if(!img.getParentFile().exists()){
                img.getParentFile().mkdirs();
            }
            img.createNewFile();
            out = new FileOutputStream(img);
            // Base64解码
            byte[] b = decoder.decode(imgData);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {// 调整异常数据
                    b[i] += 256;
                }
            }
            out.write(b);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (out != null) {
                try {
                    out.flush();
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return true;
        }
    }
}