先來看一下SpringBoot官網中對@PropertySource注解的一些使用說明:
大概了解一下就是:
可能碰到的問題就是加載不到自定義的配置文件
技術使用中出現的問題、org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [org.zdd.bookstore.BookstoreApplication]; nested exception is java.io.FileNotFoundException: class path resource [resource.properties] cannot be opened because it does not exist
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:184) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:316) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:271) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:91) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:692) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:530) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:386) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1242) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1230) [spring-boot-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.zdd.bookstore.BookstoreApplication.main(BookstoreApplication.java:25) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.6.RELEASE.jar:2.0.6.RELEASE]
Caused by: java.io.FileNotFoundException: class path resource [resource.properties] cannot be opened because it does not exist
at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:180) ~[spring-core-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.core.io.support.EncodedResource.getReader(EncodedResource.java:143) ~[spring-core-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:95) ~[spring-core-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:73) ~[spring-core-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.core.io.support.PropertiesLoaderUtils.loadProperties(PropertiesLoaderUtils.java:59) ~[spring-core-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.core.io.support.ResourcePropertySource.(ResourcePropertySource.java:67) ~[spring-core-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.core.io.support.DefaultPropertySourceFactory.createPropertySource(DefaultPropertySourceFactory.java:37) ~[spring-core-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.processPropertySource(ConfigurationClassParser.java:453) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:272) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:245) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:194) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:296) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:245) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:202) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:170) ~[spring-context-5.0.10.RELEASE.jar:5.0.10.RELEASE]
… 18 common frames omitted
IO流報錯,加載不到配置文件
檢查你的resouces文件是不是在項目初始化的時候自己后期添加進去的,將resources寫成了resource
,導致不能正常的加載。
解決辦法1:直接把文件重命名即可
解決辦法2:如果使用maven插件來打包的話可以給插件指定加載打包資源的目錄。
<plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-resources-plugin</artifactId><executions><execution><configuration><resources><resource><!-- 主要是這里--><directory>src/main/resources</directory><includes><include>../*.*</include></includes></resource></resources></configuration></execution></executions>
</plugin>
這種情況一般是沒有將資源打包進配置文件中,可以去target目錄檢查一下看resouces中的文件是否加載到打包的文件中
。
使用注意哪些問題,比如下面這個就沒有加載資源,導致問題的原因是打包方式居然是pom!
更正后:
官方文檔說不能加載yaml的文件,需要使用properties的文件。
這個還沒測試,不過可以往這方面考慮一下。
還有一些其他因素,可能是沒有將@PropertySource標注的類放入的Spring的容器中等等,一般都是前面兩種情況的居多。
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