@ConfigurationProperties加载外部配置方式

environment:
  production:
    url: http://production.example.com
    name: production mode
  dev:
    url: http://dev.example.com
    name: developer mode

class Environment{
     Production production;
     Dev dev;
     class Production{
           String url;
           String name;
     }
     class Dev{
           String url;
           String name;
     }
}

@Configuration   //配置类注解，被自动扫描发现
@PropertySource("classpath:application.yml") //指明配置源文件位置
@ConfigurationProperties("environment") //指明前缀
public class EnvConfig {
    private final Dev dev=new Dev();
    private final Production production=new Production();


    public Dev getDev() {
        return dev;
    }
   //getXXX必须中xxx和字段名production严格一致，否则出异常，即使松弛绑定，也要这样
    public Production getProduction() {
        return production;
    }

    public static class Dev{
        private String url;
        private String name;

        public String getUrl() {
            return url;
        }

        public void setUrl(String url) {
            this.url = url;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
        //toString
    }
    public static class Production{
        private String url;
        private String name;
        //setter and getter省略
       //toString
    }
   //toString()
}

@Controller
public class TestStaticController {
    Logger log= LoggerFactory.getLogger(TestStaticController.class);
    @Autowired
    public EnvConfig env;

    @GetMapping("/envtest")
    public String getEnv(){
        log.info(this.env.toString());
        return "test";
    }
}

@ConfigurationProperties(prefix = "service.properties")
public class HelloServiceProperties {
    private static final String SERVICE_NAME = "test-service";

    private String msg = SERVICE_NAME;
       set/get
}


@Configuration
@EnableConfigurationProperties(HelloServiceProperties.class)
@ConditionalOnClass(HelloService.class)
@ConditionalOnProperty(prefix = "hello", value = "enable", matchIfMissing = true)
public class HelloServiceAutoConfiguration {

}

@RestController
public class ConfigurationPropertiesController {

    @Autowired
    private HelloServiceProperties helloServiceProperties;

    @RequestMapping("/getObjectProperties")
    public Object getObjectProperties () {
        System.out.println(helloServiceProperties.getMsg());
        return myConfigTest.getProperties();
    }
}

service.properties.name=my-test-name
service.properties.ip=192.168.1.1
service.user=kayle
service.port=8080

@ConfigurationProperties(prefix = "service.properties")
@Component
public class HelloServiceProperties {
    private static final String SERVICE_NAME = "test-service";

    private String msg = SERVICE_NAME;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

}