Java - 将字符串编码为 Base64

Question

I am converting a piece of javascript code to java and want to encode a string to Base64 in java. Code in javascript:

let encodedData = btoa(String.fromCharCode.apply(null, new Uint8Array(array)))

This converts Uint8Array to string first and then encode it to Base64. But I am not able to find a way to do same in java. Java code is

InputStream insputStream = new FileInputStream(file);
long length = file.length();
byte[] bytes = new byte[(int) length];

insputStream.read(bytes);
insputStream.close();

byte[] encodedBytes = Base64.getEncoder().encode(bytes);

Which is encoding bytes. Dues to which, encodedData (js) and encodedBytes (java) are not same. What I want to do is something like:

String str = new String(bytes);
byte[] encodedBytes = Base64.getEncoder().encode(str); // ERROR: encode doesn't accept string

Is there any way to achieve this?

Answer 1

Base64.getEncoder().encode(str.getBytes(Charset)) may help you (as Thomas noticed). But i can't guess your charset. The right syntax for Charset will be something like StandartCharsets.SOME_CHARSET or Charset.forName("some_charset")