解决SpringCloud项目引用SpringCloud Config配置文件无效问题_peng_wei_kang

irpas 02-07 4088

报错问题

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'xxxx' in value "${xxxx}"

解决办法

将项目配置文件下的Spring Cloud Config Client配置信息写在? ?bootstrap.yml或者bootstrap.properties??文件中（而不是application.yml或者application.properties）

因为?bootstrap.yml 的优先级大于?application.yml，项目启动后收优先加载bootstrap.yml配置文件

原因分析

Spring Cloud Config Server项目配置文件 application.yml 如下：

server: port: 9002 spring: application: name: config-server profiles: active: native cloud: config: server: native: search-locations: /opt/bip/config eureka: client: service-url: defaultZone: http://localhost:9000/eureka/ instance: preferIpAddress: true lease-expiration-duration-in-seconds: 30 lease-renewal-interval-in-seconds: 30

Eureka Server项目配置文件 application.yml 如下：

server: port: 9000 spring: application: #通过查看注册中心查看有哪些模块注册进了这个注册中心 name: eureka-server eureka: instance: hostname: 127.0.0.1 client: #是否向服务注册中心注册自己,默认为true register-with-eureka: false #是否检索服务 fetch-registry: false service-url: defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

Eurka网页监控如下：

启动没有任何问题

接下是配置Spring Boot（调用Cloud Config Server下的配置信息）项目配置 application.yml 如下：

server: port: 9001 spring: application: #通过查看注册中心查看有哪些模块注册进了这个注册中心 name: service-demo cloud: config: #获取配置的策略 name: config profile: dev #获取配置文件的分支，默认是master。如果是是本地获取的话，则无用 label: dev #开启配置信息发现 discovery: enabled: true #指定配置中心的service-id，便于扩展为高可用配置集群 serviceId: config-server eureka: client: serviceUrl: defaultZone: http://127.0.0.1:9000/eureka/

Controller代码如下：

@RestController @RequestMapping("/index") public class IndexController { @Value("${pname}") public String pname; @RequestMapping("hello") public String hello(String name){ return "Service1: hello " +name +":"+pname; } } 启动报错如下： 2021-04-02 11:19:17.338 INFO 7327 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Fetching config from server at : http://localhost:8888 2021-04-02 11:19:17.440 INFO 7327 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Connect Timeout Exception on Url - http://localhost:8888. Will be trying the next url if available 2021-04-02 11:19:17.441 WARN 7327 --- [ main] c.c.c.ConfigServicePropertySourceLocator : Could not locate PropertySource: I/O error on GET request for "http://localhost:8888/config/dev/dev": Connection refused (Connection refused); nested exception is java.net.ConnectException: Connection refused (Connection refused) 2021-04-02 11:19:17.443 INFO 7327 --- [ main] c.c.stm.yunnanstm.YunnanStmApplication : No active profile set, falling back to default profiles: default 2021-04-02 11:19:18.021 INFO 7327 --- [ main] o.s.cloud.context.scope.GenericScope : BeanFactory id=01cf18c7-5215-3034-82de-1e65de9e0574 2021-04-02 11:19:18.296 INFO 7327 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 9001 (http) 2021-04-02 11:19:18.304 INFO 7327 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2021-04-02 11:19:18.304 INFO 7327 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.43] 2021-04-02 11:19:18.392 INFO 7327 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2021-04-02 11:19:18.392 INFO 7327 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 935 ms 2021-04-02 11:19:18.432 WARN 7327 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'indexController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'pname' in value "${pname}" 2021-04-02 11:19:18.433 INFO 7327 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat] 2021-04-02 11:19:18.443 INFO 7327 --- [ main] ConditionEvaluationReportLoggingListener : Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2021-04-02 11:19:18.458 ERROR 7327 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'indexController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'pname' in value "${pname}" at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:405) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1425) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897) ~[spring-beans-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.13.RELEASE.jar:5.2.13.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.9.RELEASE.jar:2.3.9.RELEASE] Disconnected from the target VM, address: '127.0.0.1:53174', transport: 'socket' 分析情况及

系统默认去?http://localhost:8888?而不是我们在eureka中注册的 http://localhost:9002/ ,说明我们application.yml配置文件?没有生效 ,而是加载了cloud.config.client默认配置，

一顿思考以及查看文档后发现?org.springframework.cloud.config.client.ConfigClientProperties 类中有配置uri信息为 http://localhost:8888。

@ConfigurationProperties("spring.cloud.config") public class ConfigClientProperties { public static final String PREFIX = "spring.cloud.config"; public static final String TOKEN_HEADER = "X-Config-Token"; public static final String STATE_HEADER = "X-Config-State"; public static final String AUTHORIZATION = "authorization"; private boolean enabled = true; private String profile = "default"; @Value("${spring.application.name:application}") private String name; private String label; private String username; private String password; private String[] uri = new String[]{"http://localhost:8888"}; private String mediaType = "application/vnd.spring-cloud.config-server.v2+json"; private ConfigClientProperties.Discovery discovery = new ConfigClientProperties.Discovery(); private TlsProperties tls = new TlsProperties(); private boolean failFast = false; private String token; private int requestReadTimeout = 185000; private int requestConnectTimeout = 10000; private boolean sendState = true; private Map<String, String> headers = new HashMap(); 分析结果办法

将项目配置文件下的Spring Cloud Config Client配置信息写在? ?bootstrap.yml或者bootstrap.properties??文件中（而不是application.yml或者application.properties）

因为?bootstrap.yml 的优先级大于?application.yml，项目启动后收优先加载bootstrap.yml配置文件