idea运行报错之 Input length = 1

idea运行报错之 Input length = 1

报文：

11:30:16.063 [main] ERROR org.springframework.boot.SpringApplication - Application startup failed
java.lang.IllegalStateException: Failed to load property source from location 'classpath:/application.yml'
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadIntoGroup(ConfigFileApplicationListener.java:476)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:465)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:386)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.addPropertySources(ConfigFileApplicationListener.java:225)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.postProcessEnvironment(ConfigFileApplicationListener.java:195)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEnvironmentPreparedEvent(ConfigFileApplicationListener.java:182)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEvent(ConfigFileApplicationListener.java:168)
	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:122)
	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:325)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:296)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
	at com.iotlead.hardware.api.Application.main(Application.java:35)
Caused by: org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException: Input length = 1
	at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:200)
	at org.yaml.snakeyaml.reader.StreamReader.<init>(StreamReader.java:60)
	at org.yaml.snakeyaml.Yaml.loadAll(Yaml.java:463)
	at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:159)
	at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:137)
	at org.springframework.boot.env.YamlPropertySourceLoader$Processor.process(YamlPropertySourceLoader.java:101)
	at org.springframework.boot.env.YamlPropertySourceLoader.load(YamlPropertySourceLoader.java:58)
	at org.springframework.boot.env.PropertySourcesLoader.load(PropertySourcesLoader.java:128)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.doLoadIntoGroup(ConfigFileApplicationListener.java:490)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadIntoGroup(ConfigFileApplicationListener.java:473)
	... 17 common frames omitted
Caused 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:123)
	at java.io.Reader.read(Reader.java:140)
	at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:184)
	... 26 common frames omitted
Disconnected from the target VM, address: '127.0.0.1:57195', transport: 'socket'

Process finished with exit code 1

原因是：Spring Boot 在尝试加载 application.yml 配置文件时遇到编码问题，导致 YAML 解析失败。

解决：1、编码问题
确认 application.yml 文件的编码是否为 UTF-8。如果不是，请转换文件编码至 UTF-8。

2、清理项目缓存
如果不生效就先clean maven