convert UTF 8 string codes(codes are holded in string variable) into UTF 16 string(actual utf 16 chars)

Question

I have converted UTF 16 to UTF 8 (method used : toUTF8Array)codes in javascript and sent the code from ajax call(note : UTF 16 chars is ugly and it needed encoding which I dont want!) Js code :

var compressed = LZString.compressToUTF16(uncompressed64Data);
var utf8values = toUTF8Array(compressed); 
    jQuery.ajax({
data :"img=+" utf8values 
}

I have received the UTF 8 codes in java server side as follow :

 String utf8values = request.getParameter("img");

fyi, outcome of sop: utf8values : 225,186,162,227,160,181,229,160,165

Now I want change the codes into actual UTF 16 string?

Thanks in advance!

Is "225,186,162,227,160,181,229,160,165" The actual string you have? — Oleg
– Oleg, Commented Sep 22, 2017 at 9:13
The attribute is named img, are you trying to send image data to the backend? — Kayaman
– Kayaman, Commented Sep 22, 2017 at 9:45
@Oleg : exactly!! By the way are we able to send UTF 16 chars (Ả㠵堥) without encoding into server.? currently I have huge UTF16 data which is not going to server due to non encoding!! — Will Mcavoy
– Will Mcavoy, Commented Sep 22, 2017 at 9:50

Oleg · Accepted Answer · 2017-09-22 10:00:13Z

1

The following should work:

String[] split = "225,186,162,227,160,181,229,160,165".split(",");
ByteBuffer bb = ByteBuffer.allocate(split.length);
Arrays.stream(split).forEach(a -> bb.put((byte)Integer.parseInt(a)));
bb.flip();
String string = Charset.forName("UTF-8").decode(bb).toString();

answered Sep 22, 2017 at 10:00

Oleg

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2 Comments

Will Mcavoy Over a year ago

excellent answer. I would be more happy if you able to extract this java 1.7. Thanks

Oleg Over a year ago

@WillMcavoy I just used it for some brevity replacing forEach with a loop is easy enough.

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