Decoding %E9 to utf8 fails

问题

I'm having some trouble decoding some encoding char. What i need to decode is the %E9, i have a string like this D%E9bardeur and degr%E9 What i do in my java class, is the following:

try
      {
        System.out.println(o);// test
        o = URLDecoder.decode((String) o, "UTF-8");
      }
      catch (UnsupportedEncodingException e)
      {
        e.printStackTrace();
      }

After this operation, what i get is

D�bardeur and degr�

The very same happens when i dont decode to utf-8

Any advice? thx

回答1:

%E9 is not UTF-8.

The correct way to decode this would be:

URLDecoder.decode((String) o, "ISO-8859-1")

回答2:

By %E9, could you mean there is a byte in your string that evaluates to hex E9? Because if so, that flags as "multibyte" in UTF-8, and there are 2 more "continuation bytes" (within the correct range) that follow.

Because remember, UTF-8 is a variable length encoding, so some code points (character values) are represented by 1 byte, some by 2, 3, etc.

If you have a string you're treating as UTF-8 and E9 is encountered, the next 2 bytes need to be in the correct range. For example, in this string, 00, which follows E9 is not a valid continuation byte:

http://hexutf8.com/?q=0x640x650x670x720xe90x00

Here's an example where E9 in a string is followed by the correct 2 bytes:

http://hexutf8.com/?q=0xc20xa90xe90x810xaa

And the appropriate character is represented.

来源：https://stackoverflow.com/questions/18352605/decoding-e9-to-utf8-fails