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]