ZCW-SpringOne/initial/src/main/java/hello/HelloController.java

package hello;

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

@Controller
public class HelloController {
    
    @RequestMapping("/")
    public @ResponseBody String index() {
        return "Greetings from Spring Boot!";
    }
    
}