spring-boot对context-path的请求/为静态内容生成405不允许的方法错误

spring.resources.static-locations=classpath:/static/

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HomeController {

    @GetMapping("/")
    public String index() {
        return "Hello, World!";
    }
}

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class MyApplication {

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

    @RestController
    public class HomeController {

        @GetMapping("/")
        public String index() {
            return "Hello, World!";
        }
    }
}