Encoding as Base64 in Java

Question

I need to encode some data in the Base64 encoding in Java. How do I do that? What is the name of the class that provides a Base64 encoder?

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Answer 1

If you are using Spring Framework at least version 4.1, you can use the org.springframework.util.Base64Utils class:

byte[] raw = { 1, 2, 3 };
String encoded = Base64Utils.encodeToString(raw);
byte[] decoded = Base64Utils.decodeFromString(encoded);

It will delegate to Java 8's Base64, Apache Commons Codec, or JAXB DatatypeConverter, depending on what is available.