Base64 Encoding in Java

I'm using Eclipse. I have the following line of code:

wr.write(new sun.misc.BASE64Encoder().encode(buf));

Eclipse marks this line as an error. I imported the required libraries:

import sun.misc.BASE64Encoder;
import sun.misc.BASE64Decoder;

But again, both of them are shown as errors. I found a similar post here.

I used Apache Commons as the solution suggested by including:

import org.apache.commons.*;

and importing the JAR files downloaded from: http://commons.apache.org/codec/

But the problem still exists. Eclipse still shows the errors previously mentioned; please advise.

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You need to change the import of your Class:

import org.apache.commons.codec.binary.Base64;

And then change your Class to use the Base64 class.

Here's some example code:

byte[] encodedBytes = Base64.encodeBase64("Test".getBytes());
System.out.println("encodedBytes " + new String(encodedBytes));
byte[] decodedBytes = Base64.decodeBase64(encodedBytes);
System.out.println("decodedBytes " + new String(decodedBytes));

Then read why you shouldn't use sun.* packages.

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Update (16/12/2016)

You can now java.util.Base64 with Java8. First, import it as you normally do:

import java.util.Base64;

Then use the Base64 static methods as follows:

byte[] encodedBytes = Base64.getEncoder().encode("Test".getBytes());
System.out.println("encodedBytes " + new String(encodedBytes));
byte[] decodedBytes = Base64.getDecoder().decode(encodedBytes);
System.out.println("decodedBytes " + new String(decodedBytes));

See Javadocs for Base64 for more: https://docs.oracle.com/javase/8/docs/api/java/util/Base64.html

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使用Java 8永远不会迟到的类加入： java.util.Base64

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You can also convert using base64 encoding. To do this you can use javax.xml.bind.DatatypeConverter#printBase64Binary method

For example:

byte[] salt = new byte[] { 50, 111, 8, 53, 86, 35, -19, -47 };
System.out.println(DatatypeConverter.printBase64Binary(salt));

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