java.lang.IllegalStateException: Failed to load property source from location ‘classpath:/applicatio

今天在开发中遇到了这样一个问题：

java.lang.IllegalStateException: Failed to load property source from location ‘classpath:/application-dev.yml’

从这个报错里，我们可以清晰的看出是加载文件出了问题，我们需要先排查下配置文件是否出现了问题。比如格式错误，拼写错误等等这种低级的错误。

再给大家看下完整的报错信息，是不是这样的

java.lang.IllegalStateException: Failed to load property source from location 'classpath:/application-dev.yml'    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:549)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadForFileExtension(ConfigFileApplicationListener.java:488)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:468)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$null(ConfigFileApplicationListener.java:450)    at java.lang.Iterable.forEach(Iterable.java:75)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$load(ConfigFileApplicationListener.java:449)    at java.lang.Iterable.forEach(Iterable.java:75)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:446)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:336)    at org.springframework.boot.context.config.ConfigFileApplicationListener.addPropertySources(ConfigFileApplicationListener.java:215)    at org.springframework.boot.context.config.ConfigFileApplicationListener.postProcessEnvironment(ConfigFileApplicationListener.java:198)    at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEnvironmentPreparedEvent(ConfigFileApplicationListener.java:185)    at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEvent(ConfigFileApplicationListener.java:171)    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127)    at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74)    at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)    at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:361)    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1258)    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246)    at com.dawn.rockcandy.RockCandyApplication.main(RockCandyApplication.java:11)Caused by: org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException: Input length = 1    at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:254)    at org.yaml.snakeyaml.reader.StreamReader.(StreamReader.java:58)    at org.yaml.snakeyaml.Yaml.loadAll(Yaml.java:537)    at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:166)    at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:139)    at org.springframework.boot.env.OriginTrackedYamlLoader.load(OriginTrackedYamlLoader.java:75)    at org.springframework.boot.env.YamlPropertySourceLoader.load(YamlPropertySourceLoader.java:50)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadDocuments(ConfigFileApplicationListener.java:567)    at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:523)    ... 23 common frames omittedCaused by: java.nio.charset.MalformedInputException: Input length = 1    at java.nio.charset.CoderResult.throwException(CoderResult.java:281)    at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:339)    at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)    at java.io.InputStreamReader.read(InputStreamReader.java:184)    at org.yaml.snakeyaml.reader.UnicodeReader.read(UnicodeReader.java:125)    at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:223)    ... 31 common frames omitte

如果你的文件名称是完全正常的，编译后的target文件里面也有application-dev.yml，那你

打开target文件，查看application-dev.yml文件，发现这个文件居然是空的，说明这个文件编译失败了！！！

最后找到问题，因为这个文件的编码格式是GBK，项目的编码格式是UTF-8，里面有注释，注释乱码，导致编译失败