How to Encode and Decode Base64 Data in Java Using Apache Commons Codec and Java 8?

Encoding Data in Base64 Using Java

The Base64 encoding scheme provides a way to represent arbitrary binary data in an ASCII string format. This article demonstrates how to encode data in Base64 using Java, addressing the challenges faced when attempting to use the sun.misc.BASE64Encoder class.

Solution Using Apache Commons Codec

When attempting to use the sun.misc.BASE64Encoder class in Eclipse, an error occurs due to the deprecation of the sun.* packages in Java. To resolve this, it's recommended to utilize the Apache Commons Codec library instead.

1. Import the correct class:

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

2. Use the Base64 class as follows:

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

Solution Using Java 8 and Later

In Java 8 and later versions, the java.util.Base64 class provides a convenient way to encode and decode data in Base64.

1. Import the Base64 class:

   import java.util.Base64;

2. Use the Base64 static methods:

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

Additional Notes

• To encode data as a string, use the encodeToString() method:

  String encodedString = Base64.getEncoder().encodeToString("Test".getBytes());

• Refer to the Java documentation for the Base64 class for more detailed information.

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