原因：java.lang.IllegalArgumentException：无法解析值“${some.other.property}”中的占位符 'some.other.property'
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'some.other.property' in value "${some.other.property}"
我是 Spring 技术的新手，这个问题已经困扰我好几个小时了。我的 spring 云配置客户端无法从配置服务器读取属性，因为我收到 IllegalArgumentException。配置服务器显示所有属性，但我认为 propertySources 列表 中的名称属性存在问题，我的猜测是这就是我遇到此问题的原因。我在这里附上源代码、错误和输出。请帮帮我！！
错误：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.1)
2021-01-03 22:52:41.286 INFO 6124 --- [ restartedMain] c.e.c.ConfigClientAppApplication : Starting ConfigClientAppApplication using Java 14.0.2 on RahulNair with PID 6124 (C:\Users\nairr\Documents\DB Learnings\Spring Apps\Spring Cloud\config-client-app\target\classes started by nairr in C:\Users\nairr\Documents\DB Learnings\Spring Apps\Spring Cloud\Spring_Cloud_And_Microservices)
2021-01-03 22:52:41.286 INFO 6124 --- [ restartedMain] c.e.c.ConfigClientAppApplication : No active profile set, falling back to default profiles: default
2021-01-03 22:52:41.467 INFO 6124 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-01-03 22:52:41.467 INFO 6124 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2021-01-03 22:52:43.907 INFO 6124 --- [ restartedMain] o.s.cloud.context.scope.GenericScope : BeanFactory id=ccf80bff-8490-3f1d-990f-4b6383bd7788
2021-01-03 22:52:44.391 INFO 6124 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 6451 (http)
2021-01-03 22:52:44.407 INFO 6124 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-01-03 22:52:44.407 INFO 6124 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.41]
2021-01-03 22:52:44.548 INFO 6124 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-01-03 22:52:44.548 INFO 6124 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3081 ms
2021-01-03 22:52:45.038 INFO 6124 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-01-03 22:52:45.471 INFO 6124 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-01-03 22:52:45.647 INFO 6124 --- [ restartedMain] o.s.b.a.e.web.EndpointLinksResolver : Exposing 15 endpoint(s) beneath base path '/actuator'
2021-01-03 22:52:45.723 INFO 6124 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 6451 (http) with context path ''
2021-01-03 22:52:45.833 WARN 6124 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configClientController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'some.other.property' in value "${some.other.property}"
2021-01-03 22:52:45.836 INFO 6124 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
2021-01-03 22:52:45.853 INFO 6124 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-01-03 22:52:45.877 INFO 6124 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-01-03 22:52:45.908 ERROR 6124 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configClientController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'some.other.property' in value "${some.other.property}"
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:405) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1415) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:608) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean(AbstractBeanFactory.java:374) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:381) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:184) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:371) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1159) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.cloud.context.scope.refresh.RefreshScope.eagerlyInitialize(RefreshScope.java:124) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.refresh.RefreshScope.start(RefreshScope.java:116) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.refresh.RefreshScope.onApplicationEvent(RefreshScope.java:111) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.refresh.RefreshScope.onApplicationEvent(RefreshScope.java:66) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:426) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:943) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:591) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298) ~[spring-boot-2.4.1.jar:2.4.1]
at com.example.configclientapp.ConfigClientAppApplication.main(ConfigClientAppApplication.java:12) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.4.1.jar:2.4.1]
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'some.other.property' in value "${some.other.property}"
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties[=13=](PropertySourcesPlaceholderConfigurer.java:175) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:931) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1308) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.2.jar:5.3.2]
... 33 common frames omitted
Process finished with exit code 0
当我点击 spring 云配置服务器的 ./{config-client-name}/{client-profile} 端点时，我得到以下输出。我认为有问题的部分用黄色高亮显示了。
Spring Cloud Config Server Output Image
以下是我的配置服务器代码
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>config-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>config-server</name>
<description>Demo project for Spring cloud</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<includes>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
application.properties
spring.application.name=config-server
server.port=8888
spring.cloud.config.server.git.uri=https://github.com/rahul976451/config-server-props.git
JAVA代码
package com.example.configserver;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.config.server.EnableConfigServer;
@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServerApplication.class, args);
}
}
以下是我的配置客户端代码
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>config-client-app</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>config-client-app</name>
<description>Demo project for Spring cloud</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<includes>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
application.properties 文件
server.port=6451
management.endpoints.web.exposure.include=*
bootstrap.properties 文件
spring.application.name=config-client-app
spring.cloud.config.uri=http://localhost:8888
eureka.client.server-url.defaultZone=http://localhost:8761/eureka/
JAVA 代码
main.java
package com.example.configclientapp;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class ConfigClientAppApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigClientAppApplication.class, args);
}
}
ConfigClientAppConfiguration.java
package com.example.configclientapp;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Component
@ConfigurationProperties(prefix ="some") //Going to represent our property that is named some.property
public class ConfigClientAppConfiguration {
private String property;
public String getProperty() {
return property;
}
public void setProperty(String property) {
this.property = property;
}
}
ConfigClientController.java
package com.example.configclientapp;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RefreshScope
public class ConfigClientController {
@Autowired
private ConfigClientAppConfiguration properties;
@Value("${some.other.property}") //from the configuration server's application.properties file
private String someOtherProperty;
@RequestMapping("/")
public String printConfig(){
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(properties.getProperty());
stringBuilder.append(" || ");
stringBuilder.append(someOtherProperty);
return stringBuilder.toString();
}
}
抱歉，如果我这边有任何愚蠢的错误，如果有请指出。谢谢！
“${some.other.property}”正在尝试在 application.properties 文件中搜索 属性 并尝试将其值注入到 someOtherProperty 变量中代码：
@Value("${some.other.property}") //from the configuration server's application.properties file
private String someOtherProperty;
查看您的 application.properties 文件，很明显没有定义名为 some.other.property 的条目。问题就在这里，Spring 正在尝试注入此类文件中不存在的值。
在 application.properties 文件中添加“some.other.property=foo”，并在 pom.xml 中添加以下内容：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
我终于自己找到了解决方法。似乎客户端引导不会在新的 Spring 云版本中自动发生，相反我们需要添加以下依赖项并在配置客户端的 bootstrap.xml 中明确提及引导。
添加依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
然后我在配置客户端的 bootstrap.xml 中添加了以下行，它神奇地工作了。
spring.cloud.bootstrap.enabled=true
我从这个 link:
:
非常感谢你们的帮助和贡献！感谢@Bragolgirith 的修复。希望这可以帮助人们并节省他们的时间。
今天是 2022 年 1 月 21 日（spring 引导版本 2.6.3），配置客户端配置通过三个设置完成：
- 只在 pom.xml
中添加 spring-cloud-starter-config 依赖项
- 在 application.properties 中为配置服务器设置 url: spring.config.import=configserver: http://localhost:8888
- 设置客户端的名称，以便它获取仅分配给它的配置：spring.application.name=movie-catalog-service
spring-cloud-starter-bootstrap 依赖项和 bootstrap.properties 不需要。
注意：spring-cloud.version=2021.0.0
我是 Spring 技术的新手，这个问题已经困扰我好几个小时了。我的 spring 云配置客户端无法从配置服务器读取属性，因为我收到 IllegalArgumentException。配置服务器显示所有属性，但我认为 propertySources 列表 中的名称属性存在问题，我的猜测是这就是我遇到此问题的原因。我在这里附上源代码、错误和输出。请帮帮我！！
错误：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.4.1)
2021-01-03 22:52:41.286 INFO 6124 --- [ restartedMain] c.e.c.ConfigClientAppApplication : Starting ConfigClientAppApplication using Java 14.0.2 on RahulNair with PID 6124 (C:\Users\nairr\Documents\DB Learnings\Spring Apps\Spring Cloud\config-client-app\target\classes started by nairr in C:\Users\nairr\Documents\DB Learnings\Spring Apps\Spring Cloud\Spring_Cloud_And_Microservices)
2021-01-03 22:52:41.286 INFO 6124 --- [ restartedMain] c.e.c.ConfigClientAppApplication : No active profile set, falling back to default profiles: default
2021-01-03 22:52:41.467 INFO 6124 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2021-01-03 22:52:41.467 INFO 6124 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2021-01-03 22:52:43.907 INFO 6124 --- [ restartedMain] o.s.cloud.context.scope.GenericScope : BeanFactory id=ccf80bff-8490-3f1d-990f-4b6383bd7788
2021-01-03 22:52:44.391 INFO 6124 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 6451 (http)
2021-01-03 22:52:44.407 INFO 6124 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-01-03 22:52:44.407 INFO 6124 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.41]
2021-01-03 22:52:44.548 INFO 6124 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-01-03 22:52:44.548 INFO 6124 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3081 ms
2021-01-03 22:52:45.038 INFO 6124 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2021-01-03 22:52:45.471 INFO 6124 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-01-03 22:52:45.647 INFO 6124 --- [ restartedMain] o.s.b.a.e.web.EndpointLinksResolver : Exposing 15 endpoint(s) beneath base path '/actuator'
2021-01-03 22:52:45.723 INFO 6124 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 6451 (http) with context path ''
2021-01-03 22:52:45.833 WARN 6124 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configClientController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'some.other.property' in value "${some.other.property}"
2021-01-03 22:52:45.836 INFO 6124 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
2021-01-03 22:52:45.853 INFO 6124 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-01-03 22:52:45.877 INFO 6124 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-01-03 22:52:45.908 ERROR 6124 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.configClientController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'some.other.property' in value "${some.other.property}"
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:405) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1415) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:608) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean(AbstractBeanFactory.java:374) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:381) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:184) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:371) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1159) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.cloud.context.scope.refresh.RefreshScope.eagerlyInitialize(RefreshScope.java:124) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.refresh.RefreshScope.start(RefreshScope.java:116) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.refresh.RefreshScope.onApplicationEvent(RefreshScope.java:111) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.cloud.context.scope.refresh.RefreshScope.onApplicationEvent(RefreshScope.java:66) ~[spring-cloud-context-3.0.0.jar:3.0.0]
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:426) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:943) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:591) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:326) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1309) ~[spring-boot-2.4.1.jar:2.4.1]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1298) ~[spring-boot-2.4.1.jar:2.4.1]
at com.example.configclientapp.ConfigClientAppApplication.main(ConfigClientAppApplication.java:12) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.4.1.jar:2.4.1]
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'some.other.property' in value "${some.other.property}"
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:239) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210) ~[spring-core-5.3.2.jar:5.3.2]
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties[=13=](PropertySourcesPlaceholderConfigurer.java:175) ~[spring-context-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:931) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1308) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1287) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.2.jar:5.3.2]
... 33 common frames omitted
Process finished with exit code 0
当我点击 spring 云配置服务器的 ./{config-client-name}/{client-profile} 端点时，我得到以下输出。我认为有问题的部分用黄色高亮显示了。
Spring Cloud Config Server Output Image
以下是我的配置服务器代码
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>config-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>config-server</name>
<description>Demo project for Spring cloud</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<includes>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
application.properties
spring.application.name=config-server
server.port=8888
spring.cloud.config.server.git.uri=https://github.com/rahul976451/config-server-props.git
JAVA代码
package com.example.configserver;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.config.server.EnableConfigServer;
@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServerApplication.class, args);
}
}
以下是我的配置客户端代码
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>config-client-app</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>config-client-app</name>
<description>Demo project for Spring cloud</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<includes>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
application.properties 文件
server.port=6451
management.endpoints.web.exposure.include=*
bootstrap.properties 文件
spring.application.name=config-client-app
spring.cloud.config.uri=http://localhost:8888
eureka.client.server-url.defaultZone=http://localhost:8761/eureka/
JAVA 代码 main.java
package com.example.configclientapp;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class ConfigClientAppApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigClientAppApplication.class, args);
}
}
ConfigClientAppConfiguration.java
package com.example.configclientapp;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Component
@ConfigurationProperties(prefix ="some") //Going to represent our property that is named some.property
public class ConfigClientAppConfiguration {
private String property;
public String getProperty() {
return property;
}
public void setProperty(String property) {
this.property = property;
}
}
ConfigClientController.java
package com.example.configclientapp;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RefreshScope
public class ConfigClientController {
@Autowired
private ConfigClientAppConfiguration properties;
@Value("${some.other.property}") //from the configuration server's application.properties file
private String someOtherProperty;
@RequestMapping("/")
public String printConfig(){
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(properties.getProperty());
stringBuilder.append(" || ");
stringBuilder.append(someOtherProperty);
return stringBuilder.toString();
}
}
抱歉，如果我这边有任何愚蠢的错误，如果有请指出。谢谢！
“${some.other.property}”正在尝试在 application.properties 文件中搜索 属性 并尝试将其值注入到 someOtherProperty 变量中代码：
@Value("${some.other.property}") //from the configuration server's application.properties file
private String someOtherProperty;
查看您的 application.properties 文件，很明显没有定义名为 some.other.property 的条目。问题就在这里，Spring 正在尝试注入此类文件中不存在的值。
在 application.properties 文件中添加“some.other.property=foo”，并在 pom.xml 中添加以下内容：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
我终于自己找到了解决方法。似乎客户端引导不会在新的 Spring 云版本中自动发生，相反我们需要添加以下依赖项并在配置客户端的 bootstrap.xml 中明确提及引导。
添加依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
然后我在配置客户端的 bootstrap.xml 中添加了以下行，它神奇地工作了。
spring.cloud.bootstrap.enabled=true
我从这个 link:
非常感谢你们的帮助和贡献！感谢@Bragolgirith 的修复。希望这可以帮助人们并节省他们的时间。
今天是 2022 年 1 月 21 日（spring 引导版本 2.6.3），配置客户端配置通过三个设置完成：
- 只在 pom.xml 中添加 spring-cloud-starter-config 依赖项
- 在 application.properties 中为配置服务器设置 url: spring.config.import=configserver: http://localhost:8888
- 设置客户端的名称，以便它获取仅分配给它的配置：spring.application.name=movie-catalog-service
spring-cloud-starter-bootstrap 依赖项和 bootstrap.properties 不需要。
注意：spring-cloud.version=2021.0.0