How do I convert a byte array to Base64 in Java

Question

Okay  I know how to do it in C    It s as simple as   Convert ToBase64String byte    and Convert FromBase64String string  to get byte   back    How can I do this in Java

User · Answer

Use   byte   data   Base64 encode base64str     Encoding converts to Base64  You would need to reference commons codec from your project in order for that code to work   For java8   import java util Base64

User · Answer

In case you happen to be using Spring framework along with java  there is an easy way around    Import the following   import org springframework util Base64Utils  Convert like this    byte   bytearr   0 1 2 3 4   String encodedText   Base64Utils encodeToString bytearr     To decode you can use the decodeToString method of the Base64Utils class

User · Answer

Additionally  for our Android friends  API Level 8    import android util Base64       Base64 encodeToString bytes  Base64 DEFAULT

User · Answer

Java 8  Encode or decode byte arrays  byte   encoded   Base64 getEncoder   encode  quot Hello quot  getBytes     println new String encoded         Outputs  quot SGVsbG8  quot   byte   decoded   Base64 getDecoder   decode encoded   println new String decoded         Outputs  quot Hello quot   Or if you just want the strings  String encoded   Base64 getEncoder   encodeToString  quot Hello quot  getBytes     println encoded        Outputs  quot SGVsbG8  quot   String decoded   new String Base64 getDecoder   decode encoded getBytes      println decoded        Outputs  quot Hello quot   For more info  see Base64  Java  lt  8 Base64 is not bundled with Java versions less than 8  I recommend using Apache Commons Codec  For direct byte arrays  Base64 codec   new Base64    byte   encoded   codec encode  quot Hello quot  getBytes     println new String encoded         Outputs  quot SGVsbG8  quot   byte   decoded   codec decode encoded   println new String decoded         Outputs  quot Hello quot   Or if you just want the strings  Base64 codec   new Base64    String encoded   codec encodeBase64String  quot Hello quot  getBytes     println encoded        Outputs  quot SGVsbG8  quot   String decoded   new String codec decodeBase64 encoded    println decoded        Outputs  quot Hello quot   Spring If you re working in a Spring project already  you may find their org springframework util Base64Utils class more ergonomic  For direct byte arrays  byte   encoded   Base64Utils encode  quot Hello quot  getBytes     println new String encoded         Outputs  quot SGVsbG8  quot   byte   decoded   Base64Utils decode encoded   println new String decoded         Outputs  quot Hello quot   Or if you just want the strings  String encoded   Base64Utils encodeToString  quot Hello quot  getBytes     println encoded        Outputs  quot SGVsbG8  quot   String decoded   Base64Utils decodeFromString encoded   println new String decoded         Outputs  quot Hello quot   Android  with Java  lt  8  If you are using the Android SDK before Java 8 then your best option is to use the bundled android util Base64  For direct byte arrays  byte   encoded   Base64 encode  quot Hello quot  getBytes     println new String encoded         Outputs  quot SGVsbG8  quot   byte    decoded   Base64 decode encoded   println new String decoded         Outputs  quot Hello quot   Or if you just want the strings  String encoded   Base64 encodeToString  quot Hello quot  getBytes     println encoded        Outputs  quot SGVsbG8  quot   String decoded   new String Base64 decode encoded    println decoded        Outputs  quot Hello quot

[java] How do I convert a byte array to Base64 in Java?

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