Java 图片、文件 Base64 互转

package com.thoth.his.base.util;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Base64;
public class ImageUtil {
    public static String FileToBase64(String filePath) throws IOException {
        FileInputStream inputStream = null;
        try {
            Base64.Encoder encoder = Base64.getEncoder();
            inputStream = new FileInputStream(filePath);
            int available = inputStream.available();
            byte[] bytes = new byte[available];
            inputStream.read(bytes);
            return encoder.encodeToString(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            inputStream.close();
        }
        return "";
    }
    public static boolean Base64ToFile(String base64Str, String saveFilePath) throws IOException {
        FileOutputStream outputStream = null;
        try {
            Base64.Decoder decoder = Base64.getDecoder();
            byte[] bytes = decoder.decode(base64Str);
            outputStream = new FileOutputStream(saveFilePath);
            outputStream.write(bytes);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            outputStream.close();
        }
        return false;
    }
}