servletContext.addServlet("dispatcher", new DispatcherServlet(rootContext));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
Dynamic filter = servletContext.addFilter("characterEncodingFilter", CharacterEncodingFilter.class);
filter.addMappingForUrlPatterns(null, false, "/*");
filter.setInitParameter("encoding", "UTF-8");
filter.setInitParameter("forceEncoding", "true");
servletContext.addFilter("corsFilter", CorsFilter.class)
.addMappingForUrlPatterns(null, false, "/*");