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A utilities service with generic tools implementation. Can be plugged into your java project. This is designed for Java 1.8

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package org.vfdtech.interfaces;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;

public interface IFileUtil {
    public String bufferedToBase64String (final BufferedImage img, final String formatName);
    public File buildFileFromString(String img, String[] allowedMimeTypes) throws Exception;
    public String compressImageString(String base64Img, String[] allowedMimeTypes);
    public BufferedImage compressImage(String imageString, int targetWidth, int targetHeight) throws IOException;
    public HashMap doFileValidation(String selfieImage, String[] allowedMimeTypes) throws Exception;
    public HashMap getFileAndFileExtension(String base64ImageString);
    public String convertFileToString(File file);
}