问如何使用Actix on Rust创建POST方法？

EN

 struct FirstT {}
 struct SecondT {}

 #[derive(Serialize, Deserialize,Debug)]
 struct PostData {
   first_t: FirstT,
   second_t: SecondT 
 }


 
 async fn submit(data: web::Json<PostData>) -> HttpResponse {
     //use data.first_t data.second_t
 }

 #[actix_rt::main]
 async fn main() -> std::io::Result<()> {

  HttpServer::new(|| {
     App::new()
      .data(web::JsonConfig::default().limit(4096)) 
      .service(web::resource("/submit").route(web::post().to(submit)))
  })
  .bind("127.0.0.1:8000")?
  .run()
  .await
}