springboot中.yml文件的值无法读取的问题及解决

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

@Configuration
@ConfigurationProperties(prefix = "mq")
public class AliMqConfig {
    @Value("${mq.producer_id}")
    public String producerId;
    @Value("${mq.consumer_id}")
    public String consumerId;

mq:
  producer_id: xxxxx
  consumer_id: prod