request.getQueryString() seems to need some encoding

Question

I have some problem with UTF-8. My client (realized in GWT) make a request to my servlet, with some parametres in the URL, as follow:

http://localhost:8080/s         


        

Answer 1

It really took all day but :

final String param = new String(request.getParameter("param").getBytes(
                "iso-8859-1"), "UTF-8");

See also here. Note that this is valid iff the decoding charset (URIEncoding in tomcat) of the server is iso-8859-1 - otherwise this charset must be passed in. For an example of how to get the URIEncoding charset from the server.xml for Tomcat 7 see my quoted answer