Java - URLDecoder.decode(String s) vs URLDecoder.decode(String s, String enc)

问题

What is the difference between

URLDecoder.decode(String s)

and

URLDecoder.decode(String s, String enc)

I had a Cookie value like

val=%22myvalue%22

I am retirieving it.

Cookie[] cookies=request.getCookies();

String val=cookies[0].getValue();

But the value of val is %22myvalue%22

So I tried URLDecoder

String val1=URLDecoder.decode(val);
String val2=URLDecoder.decode(val,"utf8");

And values of both are same, that is myvalue

So what is the difference between both?

回答1:

URLDecoder.decode(String s)

Decodes a x-www-form-urlencoded string. The platform's default encoding is used to determine what characters are represented by any consecutive sequences of the form "%xy".

Note: It is deprecated.

URLDecoder.decode(String s, String enc)

Decodes a application/x-www-form-urlencoded string using a specific encoding scheme. The supplied encoding is used to determine what characters are represented by any consecutive sequences of the form "%xy".

Entire info you can find here.

来源：https://stackoverflow.com/questions/21309930/java-urldecoder-decodestring-s-vs-urldecoder-decodestring-s-string-enc