Main.java

public static String convertZipFileToBaseEncodeString() {
		File originalFile = new File("multifiles.zip");
		String encodedBase64 = null;
		try {
			FileInputStream fileInputStreamReader = new FileInputStream(originalFile);
			byte[] bytes = new byte[(int) originalFile.length()];
			fileInputStreamReader.read(bytes);
			encodedBase64 = new String(Base64.encodeBase64(bytes));
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return encodedBase64;
	}