无法从 Spring Cloud 配置服务器接收值

Question

使用带有 Github 存储库的 spring-cloud-config 服务器时，使用 @Value(${fanout.exchange}) 注释无法初始化。 我得到：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'queue' defined in class path resource [com/eloomina/dataCollector/rabbitMQ/RabbitConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.amqp.core.Queue]: Factory method 'queue' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.rabbitConfiguration': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'fanout.exchange' in value "${fanout.exchange}"

两个类的 pom.xml 中都有 spring-cloud-config。 configServer 用 @EnableConfigServer 注释。我在 github 存储库中的文件名为 dataCollector.properties

RabbitConfiguration 类：

@Configuration
@RefreshScope
public class RabbitConfiguration {
    @Value("${fanout.exchange}")
    private String rawDataExchange;
    @Value("${queue.name}")
    private String queueName;
    @Bean
    Queue queue() {
        return new Queue(queueName, true);
    }
    @Bean
    FanoutExchange exchange() {
        return new FanoutExchange(rawDataExchange);
    }
    @Bean
    Binding binding(Queue queue, FanoutExchange exchange) {
        return BindingBuilder.bind(queue).to(exchange);
    }
}

我的配置服务器 application.properties：

server.port=8888
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka
spring.application.name=configServer
spring.cloud.config.server.git.uri=https://github.com/eLoomina/configFiles
spring.cloud.config.server.git.username=xxxxxx
spring.cloud.config.server.git.password=xxxxxx

我的客户端 bootstrap.properties：

spring.application.name=dataCollector 
spring.cloud.config.uri=http://localhost:8888
management.security.enabled=false
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka

github repo 包含一个文件：dataCollector.properties：

s

pring.devtools.restart.enabled = false

eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka


server.port=8081
spring.application.name=dataCollector

##MONGO:
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.database=accounts



management.server.port: 9001

## RABBITMQ
queue.name: rawDataQueue
fanout.exchange: rawdata-exchange
spring.rabbitmq.host: localhost
spring.rabbitmq.port: 5672
spring.rabbitmq.username: guest
spring.rabbitmq.password: guest

##LOGGING:
logging.file=dataCollector.log

知道为什么 dataCollector 服务不会从配置服务器获取 fanout.exchange 吗？

Answer 1

你的文件是在 spring 上下文中加载的吗？你能在日志中看到类似下面的文件吗：

INFO 1234 --- [main] b.c.PropertySourceBootstrapConfiguration：定位属性源：CompositePropertySource {name='demoService'， propertySources=[MapPropertySource {name='configClient'}, MapPropertySource {name='https://github.com/demo-configuration/application.properties'}]}