Problem Statement ?
- Given a string like password, byte array, we would like to perform Base64 encoding and decoding of input string or byte array.
Example of Base64 Encoding and decoding of String:
- Input string = “I Love Soccer”.
- Base64 encoded string should: “SSBMb3ZlIFNvY2Nlcg==”
- Base64 decoded string for “SSBMb3ZlIFNvY2Nlcg==” would be “I Love Soccer”
JDK classes for Base 64 encoding & decoding:
- Base64 class has two inner classes Encoder and Decoder which are used to encode and decode input byte data respectively.
-
Encoder class:
- Encoder class implements an encoder for encoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.
- Instances of Base64.Encoder class are SAFE for use by multiple concurrent threads.
-
Decoder class:
- Decoder class implements a decoder for decoding byte data using the Base64 encoding scheme as specified in RFC 4648 and RFC 2045.
- Instances of Base64.Decoder class are SAFE for use by multiple concurrent threads.
Code: Encode & decode byte/ string using Base64 (Java8)
package org.learn;
import java.util.Base64;
public class Base64EncodingDemo {
public static void main(String[] args) {
String input = "I Love Soccer";
byte[] bytesInput = input.getBytes();
System.out.println("Input String : "+input);
//Encode String to Base64
Base64.Encoder base64Encoder = Base64.getEncoder();
String encodedString = base64Encoder.encodeToString(bytesInput);
System.out.println("Encoded String :" + encodedString);
//Decode Base64 encoded string to String
Base64.Decoder base64Decoder = Base64.getDecoder();
byte[] byteDecoded = base64Decoder.decode(encodedString);
System.out.println("Decoded String :" + new String(byteDecoded));
}
}
Output: Base64 encoding & decoding of byte array (Java8)
Input String : I Love Soccer
Encoded String :SSBMb3ZlIFNvY2Nlcg==
Decoded String :I Love Soccer
