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<!DOCTYPE html><html><head><meta charset="utf-8"/>
<title>Home</title></head>
<body><h2>Hello World!!</h2></body>
</html>

@Controller
    public class MyController {
        @RequestMapping("/")
        public String home(Model model) {
            System.out.println("In MyController!!!");
            return "index";
    }}

@SpringBootApplication
public class MySpringBoot2Application {
    public static void main(String[] args) {
        SpringApplication.run(MySpringBoot2Application.class, args);
    }
}