一、Idea开启

二、解决步骤

1、自定义application.yaml

user:
    name: zhangsan
    age: 18
    birthday: 2020-06-06

2、java对象

类加注解，@ConfigurationProperties(prefix = "user")

@Component
@ConfigurationProperties(prefix = "user")
@Data
public class User {

    private String name;
    private Integer age;
    private String birthday;

    private Map<String, Integer> fruit;
    private Map<String, Integer> fruit2;
    private List<String> animales;
    private List<String> animales2;
}

3、启动类

增加注解 @EnableConfigurationProperties

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

4、pom 增加依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>

5、测试

@RestController
@RequestMapping(value = "/demo")
public class DemoController {
     @Resource
    private User user;
    @GetMapping(value = "/yaml/user")
    public String yamlUser(){
        return "hello springboot"+ user.toString();
    }
}