如何解決SpringBoot啟動(dòng)時(shí)無(wú)法加載配置文件或環(huán)境變量問(wèn)題
提示:?jiǎn)?dòng)springboot服務(wù),發(fā)現(xiàn)加載不了配置文件,resources目錄下的.yml配置文件圖標(biāo)顯示也異常。
一、錯(cuò)誤日志
2022-03-22 10:59:40.815 WARN --- ConfigServletWebServerApplicationContext Line:558 - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.lmm.third.ComThirdApplication]; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.profiles.active' in value "classpath:mongodb-${spring.profiles.active}.properties"
2022-03-22 10:59:40.825 ERROR --- o.s.boot.SpringApplication Line:826 - Application run failedorg.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.lmm.third.ComThirdApplication]; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.profiles.active' in value "classpath:mongodb-${spring.profiles.active}.properties"
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:188)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:319)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:236)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
at com.lmm.third.ComThirdApplication.main(ComThirdApplication.java:15)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.profiles.active' in value "classpath:mongodb-${spring.profiles.active}.properties"
at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178)
at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124)
at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:236)
at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210)
at org.springframework.core.env.AbstractEnvironment.resolveRequiredPlaceholders(AbstractEnvironment.java:571)
at org.springframework.context.annotation.ConfigurationClassParser.processPropertySource(ConfigurationClassParser.java:460)
at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:279)
at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:249)
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:198)
at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:303)
at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:249)
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:206)
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:174)
... 18 common frames omitted
二、resource目錄:
正常的resources資源目錄顯示:
非正常resources資源目錄顯示:
三、解決
1、在項(xiàng)目的pom.xml文件的<build></build>標(biāo)簽內(nèi)添加如下代碼:
<resources> <!-- 該節(jié)點(diǎn)會(huì)掃描src/main/java目錄,若該目錄下有配置文件,則需要添加以下配置,保證文件能夠被掃描和加載到 --> <resource> <directory>src/main/java</directory> <includes> <!-- 根據(jù)目錄下的文件配置需要掃描的文件類(lèi)型 --> <include>**/*.yml</include> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <!-- 該節(jié)點(diǎn)會(huì)掃描src/main/resources,一般資源文件和配置文件會(huì)放在該目錄下 --> <resource> <directory>src/main/resources</directory> <includes> <!-- 根據(jù)目錄下的文件配置需要掃描的文件類(lèi)型 --> <include>**/*.yml</include> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources>
2、另外,如果src/main/resources目錄下還有其他需要掃描指定位置的包,那么配置resource節(jié)點(diǎn)的時(shí)候,要把resource節(jié)點(diǎn)設(shè)置在掃描src/main/resources之前
如下示例:
<resources> <!-- 該節(jié)點(diǎn)會(huì)掃描src/main/java目錄,若該目錄下有配置文件,則需要添加以下配置,保證文件能夠被掃描和加載到 --> <resource> <directory>src/main/java</directory> <includes> <!-- 根據(jù)目錄下的文件配置需要掃描的文件類(lèi)型 --> <include>**/*.properties</include> </includes> <filtering>false</filtering> </resource> <!-- 掃描指定目錄的配置 --> <resource> <directory>${project.basedir}/src/main/resources/lib</directory> <targetPath>BOOT-INF/lib/</targetPath> <includes> <include>**/cloud-webapi-sdk7.0.jar</include> </includes> </resource> <!-- 該節(jié)點(diǎn)會(huì)掃描src/main/resources,一般資源文件和配置文件會(huì)放在該目錄下 --> <resource> <directory>src/main/resources</directory> <includes> <!-- 根據(jù)目錄下的文件配置需要掃描的文件類(lèi)型 --> <include>**/*.yml</include> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources>
3、<resource>節(jié)點(diǎn)中如果加了<targetPath>子節(jié)點(diǎn),要注意指定目標(biāo)目錄位置是否正確,否則也可能會(huì)導(dǎo)致掃描文件失敗,
失敗案例如下:
<resources> <resource> <directory>${project.basedir}/src/main/resources/lib</directory> <targetPath>BOOT-INF/lib/</targetPath> <includes> <include>**/k3cloud-webapi-sdk7.9.jar</include> </includes> </resource> <resource> <directory>src/main/resources</directory> <!-- 上面提到的異常,就是因?yàn)檫@個(gè)地方指向了錯(cuò)誤的目錄,導(dǎo)致配置文件掃描不到,最后把這個(gè)節(jié)點(diǎn)去掉,就能正常啟動(dòng)服務(wù)了 --> <targetPath>BOOT-INF/classes/</targetPath> </resource> </resources>
總結(jié)
踩多一點(diǎn)的坑沒(méi)什么壞處,還能總結(jié)經(jīng)驗(yàn),日后在開(kāi)發(fā)當(dāng)中才能更加細(xì)心,遇到類(lèi)似的異常也能更快排查出來(lái)!
以上為個(gè)人經(jīng)驗(yàn),希望能給大家一個(gè)參考,也希望大家多多支持腳本之家。
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