Spring boot:在运行时创建配置属性bean

@ConfigurationProperties(prefix = "myapp")
public class MyAppProperties {
    private String name;
    private int port;
    // 其他属性的getter和setter方法
}

myapp.name=MyApp
myapp.port=8080

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

@RestController
public class MyController {
    private final MyAppProperties appProperties;

    public MyController(MyAppProperties appProperties) {
        this.appProperties = appProperties;
    }

    @GetMapping("/hello")
    public String hello() {
        return "Hello, " + appProperties.getName();
    }
}