SpringBoot项目启动时出现关于application.yml的错误

错误信息：

java.lang.IllegalStateException: Failed to load property source from location 'classpath:/application.yml'

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:556) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadForFileExtension(ConfigFileApplicationListener.java:502) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:469) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$null$6(ConfigFileApplicationListener.java:450) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at java.lang.Iterable.forEach(Iterable.java:75) ~[?:1.8.0_92]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$load$7(ConfigFileApplicationListener.java:449) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at java.lang.Iterable.forEach(Iterable.java:75) ~[?:1.8.0_92]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:446) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:334) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener.addPropertySources(ConfigFileApplicationListener.java:209) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener.postProcessEnvironment(ConfigFileApplicationListener.java:192) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEnvironmentPreparedEvent(ConfigFileApplicationListener.java:179) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEvent(ConfigFileApplicationListener.java:165) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]

at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]

at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]

at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]

at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:75) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:347) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:306) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at com.cmdi.manage.CmdiSoftEMApplication.main(CmdiSoftEMApplication.java:21) [classes/:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_92]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_92]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_92]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_92]

at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.1.4.RELEASE.jar:2.1.4.RELEASE]

Caused by: org.yaml.snakeyaml.parser.ParserException: while parsing a block mapping

 in 'reader', line 13, column 3:

      application:

      ^

expected <block end>, but found '<block mapping start>'

 in 'reader', line 26, column 4:

       driver-class-name: com.mysql.jdb ... 

       ^

 

at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:572) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:214) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:144) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.composer.Composer.composeValueNode(Composer.java:236) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.composer.Composer.composeMappingChildren(Composer.java:227) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:215) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:144) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.composer.Composer.getNode(Composer.java:85) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.constructor.BaseConstructor.getData(BaseConstructor.java:123) ~[snakeyaml-1.23.jar:?]

at org.yaml.snakeyaml.Yaml$1.next(Yaml.java:547) ~[snakeyaml-1.23.jar:?]

at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:160) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]

at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:134) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]

at org.springframework.boot.env.OriginTrackedYamlLoader.load(OriginTrackedYamlLoader.java:75) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.env.YamlPropertySourceLoader.load(YamlPropertySourceLoader.java:50) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadDocuments(ConfigFileApplicationListener.java:574) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:528) ~[spring-boot-2.1.4.RELEASE.jar:2.1.4.RELEASE]

... 28 more

 

 

启动时出现的错误，最终解决，错误原因是配置的数据源，password前面多了个空格，把空格去掉后就好了。

若出现类似问题，可能是某个配置多了个空格。