application.yml配置文件属性自动装配到实体类中各种数据类型写法

application.yml，配置实体类属性

apps:
  userName: yexiang
  userAge: 27
  happy: true
  birth: 1993/01/04
# map: {k1: k1, k2: k2}  简便写法
  map:
    k1: k1
    k2: k2
# list: [code, music ,dog]  简便写法
  list:
    - code
    - music
    - dog
# dogName:该字段如果为空，则name用默认值来福，否则取该字段的值
  dog:
    name: ${apps.dogName:来福}
    age: 2

编写实体类

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

    private String userName;
    private Integer userAge;
    private Boolean happy;
    private Date birth;
    private Map<String, Object> map;
    private List<Object> list;
    private Dog dog;

    @Data
    public static class Dog {
        private String name;
        private Integer age;
    }

此时实体类的Bean已被添加到容器中 ，注入后即可使用

/**
 * @author 噎翔
 * @date 2020/7/17 23:22
 */
@SpringBootTest
@RunWith(SpringRunner.class)
public class Demo {
    @Autowired
    private User user;

    @Test
    public void test(){
        System.out.println(user.getUserName());
        System.out.println(user.getUserAge());
        System.out.println(user.getHappy());
        System.out.println(user.getBirth());
        System.out.println(user.getMap());
        System.out.println(user.getList());
        System.out.println(user.getDog());
    }
}

打印结果：

对应关系：

本文地址：https://blog.csdn.net/weixin_46009162/article/details/107420368