byte[]转换成String

//Original String
String string = "hello world";
//Convert to byte[]
byte[] bytes = string.getBytes();
//Convert back to String
String s = new String(bytes);
//Check converted string against original String
System.out.println("Decoded String : " + s);

//Original byte[]
byte[] bytes = "hello world".getBytes();
//Base64 Encoded
String encoded = Base64.getEncoder().encodeToString(bytes);
//Base64 Decoded
byte[] decoded = Base64.getDecoder().decode(encoded);
//Verify original content
System.out.println( new String(decoded) );