1. yaml配置文件

注意要将该文件编码格式改为UTF-8

spring:
  application:
    name: 好好学习

admin:
  name: 李斯
  age: 24
  books:
    - name: 数据结构
      desc: 数据书
    - name: 编译原理
      desc: 编译书

2.配置实体类

• @Data设置get，set方法
• @Component注册为Bean
• @ConfigurationProperties(prefix=“”) 设置yaml中对应的内容
• @ToString设置输出格式

@Data
@Component
@ConfigurationProperties(prefix = "admin")
@ToString
public class AdminProperties {
    private String name;
    private Integer age;
    private List<Book> books;

    @Data
    @ToString
    static class Book {
        String name;
        String desc;
    }
}

3.测试

@SpringBootApplication
public class ReadAdminConfigPropertiesApplication implements InitializingBean {

    private final AdminProperties adminProperties;

    public ReadAdminConfigPropertiesApplication(AdminProperties adminProperties) {
        this.adminProperties = adminProperties;
    }

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

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println(adminProperties.getName());
        System.out.println(adminProperties.getAge());
        System.out.println(adminProperties.getBooks());
    }
}