I create a servlet just like：
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException

{ // TODO Auto-generated method stub name =new String(request.getParameter("name").getBytes("utf-8")); System.out.println(name); System.out.println(request.getParameter("name")); response.getWriter().append("Served at: ").append(request.getContextPath()); }

then use curl --header "Content-Type:application/x-www-form-urlencoded;charset=utf-8" -d "name=中文" http://1et/Test1:8080/sync-servle

then getParameter messy code

I find someone like me ：https://stackoverflow.com/questions/43085811/ajax-post-to-jboss-eap-7-without-encodeuricomponent-occurred-messy-code

io.undertow.server.handlers.form.FormEncodedDataDefinition.FormEncodedDataParser.doParse(final StreamSourceChannel channel),it handled like this:

buffer.clear();
int c = channel.read(buffer);
if (c > 0) {
buffer.flip();
while (buffer.hasRemaining()) {
byte n = buffer.get();
builder.append((char) n);//the problem occurred here,[a][b][c] would be changed to [0][a][0][b][0][c]