Spring boot @Controller, @ResposeBody

package com.in28minutes.springboot.myfirstwebapp.hello;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class SayHelloController {
	
	//http://localhost:8080/say-hello
	@RequestMapping("say-hello")
	@ResponseBody
	public String sayHello() {
		return "Hello! What are you learning today?";
	}

@ResposeBody

return "~";  ~를 say-hello에 출력