org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException: Input length = 1

问题

运行SpringBoot项目，控制台报错

java.lang.IllegalStateException: Failed to load property source from 'file:/D:/JavaProjects/seckilldemo/target/classes/application.yml' (classpath:/application.yml)

详细问题

对于最新下载的IDEA，笔者运行SpringBoot项目，控制台报错

16:55:17.982 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
java.lang.IllegalStateException: Failed to load property source from 'file:/D:/JavaProjects/seckilldemo/target/classes/application.yml' (classpath:/application.yml)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:553)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadForFileExtension(ConfigFileApplicationListener.java:498)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:468)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$null$7(ConfigFileApplicationListener.java:447)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$load$8(ConfigFileApplicationListener.java:447)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:444)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$load$0(ConfigFileApplicationListener.java:347)
	at org.springframework.boot.context.config.FilteredPropertySource.apply(FilteredPropertySource.java:54)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:335)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.addPropertySources(ConfigFileApplicationListener.java:226)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.postProcessEnvironment(ConfigFileApplicationListener.java:210)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEnvironmentPreparedEvent(ConfigFileApplicationListener.java:200)
	at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEvent(ConfigFileApplicationListener.java:188)
	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:80)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:53)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:345)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:308)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
	at com.haut.edu.seckill.SeckillDemoApplication.main(SeckillDemoApplication.java:12)
Caused by: org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException: Input length = 1
	at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:218)
	at org.yaml.snakeyaml.reader.StreamReader.ensureEnoughData(StreamReader.java:176)
	at org.yaml.snakeyaml.reader.StreamReader.ensureEnoughData(StreamReader.java:171)
	at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:126)
	at org.yaml.snakeyaml.scanner.ScannerImpl.scanToNextToken(ScannerImpl.java:1177)
	at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:287)
	at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:227)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseImplicitDocumentStart.produce(ParserImpl.java:195)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158)
	at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148)
	at org.yaml.snakeyaml.composer.Composer.checkNode(Composer.java:82)
	at org.yaml.snakeyaml.constructor.BaseConstructor.checkData(BaseConstructor.java:123)
	at org.yaml.snakeyaml.Yaml$1.hasNext(Yaml.java:489)
	at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:200)
	at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:164)
	at org.springframework.boot.env.OriginTrackedYamlLoader.load(OriginTrackedYamlLoader.java:82)
	at org.springframework.boot.env.YamlPropertySourceLoader.load(YamlPropertySourceLoader.java:50)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadDocuments(ConfigFileApplicationListener.java:607)
	at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:523)
	... 25 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:125)
	at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:183)
	... 43 common frames omitted

Process finished with exit code 1

解决方案

1 、$File$$\to$$Settings$（或使用快捷键$Ctrl+Alt+S$）

2 、输入框输入$encoding$，将$GlobalEncoding，ProjectEncoding，Defaultencodingforpropertiesfiles$编码格式修改为UTF-8

错误原因

在Spring Boot项目中，通常使用.yml或.properties文件来存储配置信息。在加载这些文件时，需要确保文件的编码格式与加载代码中指定的编码格式一致，否则就会出现编码错误。
如上，在报错信息中提到了

java.nio.charset.MalformedInputException: Input length = 1

表明在读取配置文件时遇到了无效的字符，导致编码异常。
通常情况下，配置文件的编码应该与项目的编码格式保持一致。如果配置文件使用了其他编码格式（如GBK），而加载代码中指定了UTF-8编码格式，就会导致编码不一致的问题，从而报错。

解决原因

通过将IDEA的编码设置与项目代码一致，确保配置文件使用相同的编码格式（例如UTF-8），就能解决编码不一致的问题。修改IDEA的编码设置为UTF-8后，再次加载配置文件时就能正确读取文件内容，并避免编码异常导致的错误。
因此，通过将IDEA的编码设置修改为UTF-8，可以确保配置文件和项目代码之间的编码一致性，从而解决该问题

参考文献

错误原因及解决原因参考chatgpt

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