springboot中使用Servlet3.0的注解定义原生servlet

@WebServlet(name = "userServlet",urlPatterns = "/api/v1/test/customs")
class UserServlet extends HttpServlet {
    
    
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    
    
        PrintWriter writer=resp.getWriter();
        writer.write("this is my frist servlet");
        writer.flush();
        writer.close();
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    
    
        super.doPost(req, resp);
    }
}

启动springboot项目,打开postman