http://localhost:8080/hello 이주소로 접속하여도 콘솔에 아무것도 출력이 안되네요

[질문 내용]
여기에 질문 내용을 남겨주세요.

제가 sts4버전을 사용해서일까요??

HelloServlet .java

package hello.servlet.basic;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

@WebServlet(name = "helloServlet", urlPatterns = "/hello")

public class HelloServlet extends HttpServlet {

@Override

protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

System.out.println("HelloServlet.service");

System.out.println("request = " + request);

System.out.println("response = " + response);

String username = request.getParameter("username");

System.out.println("username = " + username);

response.setContentType("text/plain");

response.setCharacterEncoding("utf-8");

response.getWriter().write("hello " + username);

}

}

ServletApplication .java

package com.example.demo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.web.servlet.ServletComponentScan;

@ServletComponentScan

@SpringBootApplication

public class ServletApplication {

public static void main(String[] args) {

SpringApplication.run(ServletApplication.class, args);

}

}