base64decode.java

base64decode.java

import java.nio.file.Paths;
import java.nio.file.Files;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class base64decode {
	public static void main(String args[]) throws IOException {
		if (args.length == 0) {
			System.exit(1);
		}
		String strBase64 = new String(Files.readAllBytes(Paths.get(args[0])),
        StandardCharsets.UTF_8);
		byte[] buf = org.apache.commons.codec.binary.Base64.decodeBase64(strBase64);

		String str = new String(buf);
		System.out.print(str);
	}
}

Run by: java -cp /path/to/commons-codec-1.12.jar:. base64decode /path/to/testfile.b64 > /tmp/output.bin