The getEncoder() method returns the Base64.Encoder class instance that encodes using the Basic type Base64 encoding scheme. The basic encoder keeps the things simple - no line feeds are added to the output and the output is mapped to a set of characters in the Base64 Alphabet ( a-zA-Z0-9+/). The simplest way to Base64 encode a string in Java is by using the basic encoding scheme. Let us start with the basic encoding example. It can be decoded using the regular Base64 decoder, like so: String inputString 'dGhpcyBpcyBhIHN0cmluZw' String decodedString new String (Base64.getUrlDecoder (). Now it is time to do the actual Base64 encoding in Java by using the Base64 class. Alternatively, we can use the StandardCharsets class introduced in Java 7 to encode the String. There are no special steps required for decoding the Base64-encoded string without padding. The decoder ignores all line separators or other characters not found in the base64 Alphabet. Base64 decoder new Base64() byte decodedBytes code('YWJjZGVmZw') (new String(decodedBytes) + ' ') The above code does not throw an error, but instead doesn't output the decoded string as expected. Every line, except the last line, is separated from the next line by using a carriage return \r followed by a linefeed \n. The encoded output is represented in lines of no more than 76 characters each. MIME - The MIME variant uses the Basic Base64 Alphabet (characters from a-z, A-Z, 0-9, /, and +) for encoding and decoding operation.The decoder rejects the data if it contains characters outside of a-z, A-Z, 0-9, -, and _ (known as URL and Filename safe Base64 Alphabet). Decodes the given base 64 encoded string, skipping carriage returns, line feeds and spaces as needed. No line feed character is added by the encoder. Method Summary static byte, decode(String b64). URL and Filename safe - This is very much similar to the Basic Base64 encoding except that + and / symbols are replaced with - and _ respectively to make the output URL and filename safe.If there are characters outside of the Base64 alphabet, the decoder rejects the data. The encoder does not add the line feed character. Basic: - This is the standard Base64 encoding that only uses a-z, A-Z, 0-9, /, and + characters (also called The Base64 Alphabet) for encoding and decoding operation.The Base64 class was introduced in Java 8 and it supports the following variants of Base64 as specified in RFC 4648 and RFC 2045: ![]() ![]() The API includes the class 64 and its nested classes. This class provides static methods to get encoders and decoders for the Base64 encoding scheme. As of Java 8, there is an officially supported API for Base64 encoding and decoding.In time this will probably become the default choice. In this article, you'll learn how to perform Base64 encoding and decoding by using the Base64 class in Java. It is primarily used to transfer content-based messages over the Internet. Base64 is a binary-to-text encoding scheme that describes binary data in an ASCII string format by translating it into a radix-64 representation.
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