Replace ASCII codes in Java string with character equivalents

Question

I have a Java string like "%7B%22username%22%3A%22test1234%22%7B" , I want to replace all the ascii codes with the character equivalents ( %7B with { , %22 with " , etc.)

Is there a library I could use or some easy way to do this? I want to be able to handle any code from %20 to %FF .

Answer 1

You can use URLDecoder.decode(String, string) . Something like,

String str = "%7B%22username%22%3A%22test1234%22%7B";
try {
    System.out.println(URLDecoder.decode(str, "utf-8"));
} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
}

Which outputs (because you start and end with %7B )

{"username":"test1234"{