how to get a path variable value in servlet -

i want path variable in servlet. assume url www.demo.com/123/demo. want 123 value path without doing string manipulation operation.

note: following servlet doesn't have web.xml configurations. code is:

@webservlet(urlpatterns = { "/demo" }) public class demoservlet extends httpservlet {    public demoservlet()   {       super();   }    protected void doget(httpservletrequest request, httpservletresponse response)       throws servletexception, ioexception   {       dopost(request,response);   }    protected void dopost(httpservletrequest request, httpservletresponse response)       throws servletexception, ioexception   {        sysout("demo");          } } 

the portion of url referring "context". use request.getcontextpath() this. in case of example, return /123. if want exactly 123 have remove leading slash.

from documentation:

returns portion of request uri indicates context of request. context path comes first in request uri. path starts "/" character not end "/" character. servlets in default (root) context, method returns "". container not decode string.