SpringBoot自动绑定值

1. application.yaml

person:
  name: shang
  address:
    addr: 安徽
  books:
    - 《红楼梦》
    - 《西游记》
  hobbys:
    - 打篮球
    - 打乒乓球
  card: {k1: v1,k2: v2}
  games:
    - LOL
    - 王者荣耀
    - CF
  girlfriend: true
  birth: 2019/12/12

2. 只需使用一个注解@ConfigurationProperties(prefix = "person")即可实现绑定。

@Component
@ConfigurationProperties(prefix = "person")
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Person {
    private String name;
    private Address address;
    private String[] books;
    private List<String> hobbys;
    private Map<String,Object> card;
    private Set<String> games;
    private Boolean girlfriend; //null
    private Date birth;
}

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Address {
    private String addr;
}

3. 测试

@SpringBootTest
class Springboot01HelloworldApplicationTests {

    @Autowired
    private Person person;

    @Test
    void testPerson(){
        System.out.println(person);
    }
}

@ConfigurationProperties，在SpringBoot自动配置中的底层就是通过这个来改变默认值的。例如：

server:
  port: 8081