开发环境

at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders

问题描述

发布测试环境之后，访问接口失败，首先使用了下面的命令查看日志

tail -f /data/logs/server.log

出现下面的错误

at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:237)
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:211)
at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:851)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1196)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1175)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:595)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:376)
... 41 common frames omitted

这里并没有明确说哪里的错误

原因分析

使用 cat /data/logs/server.log 查看完整的日志

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-06-01 10:31:21.704 [] ERROR o.s.boot.SpringApplication - Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'systemConfig': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'system.gas.url' in value "Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-06-01 10:31:21.704 [] ERROR o.s.boot.SpringApplication - Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'systemConfig': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'system.gas.url' in value "${system.gas.url}"
"

发现了有这一段，是 application.yml 里面没有配置项 {system.gas.url} 导致的~

问题解决

application.yml 加入配置项 {system.gas.url} 之后，问题解决。

Could not resolve placeholder

问题描述

• 项目启动报错

Could not resolve placeholder 'server.servlet.context-path' in value "${server.servlet.context-path}"

但是我找到项目的 application.yml 文件，发现是有下面的配置的

server:
  port: 18804
  servlet:
    context-path:

问题分析

• 后来发现，项目启动，找的竟然是父项目的配置文件，而父项目的配置文件中，没有上面那个配置，所以报错。

• 通过对比，发现是项目资源文件夹的名称不对

• 原因是 resource 这个文件夹名称不对，导致项目启动找到的是父工程的配置文件。

• 需要把 resource 修改为 resources