앞서 드린 질문 의 보충 내용입니다. 감사합니다.

여기까지 application.xml 내용과 springApplication.run 주석시 정상 실행된 캡쳐 입니다.

아래는 주석해제시 에러 메시지 입니다.

=========================================

14:06:33.019 [main] DEBUG org.springframework.boot.context.logging.ClasspathLoggingApplicationListener - Application failed to start with classpath: unknown

14:06:33.019 [background-preinit] DEBUG org.hibernate.validator.internal.xml.config.ValidationXmlParser - Trying to load META-INF/validation.xml for XML based Validator configuration.

14:06:33.021 [background-preinit] DEBUG org.hibernate.validator.internal.xml.config.ResourceLoaderHelper - Trying to load META-INF/validation.xml via TCCL

14:06:33.022 [background-preinit] DEBUG org.hibernate.validator.internal.xml.config.ResourceLoaderHelper - Trying to load META-INF/validation.xml via Hibernate Validator's class loader

14:06:33.022 [background-preinit] DEBUG org.hibernate.validator.internal.xml.config.ValidationXmlParser - No META-INF/validation.xml found. Using annotation based configuration only.

14:06:33.188 [background-preinit] DEBUG org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator - Loaded expression factory via original TCCL

14:06:33.191 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator as ValidatorFactory-scoped message interpolator.

14:06:33.191 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.resolver.TraverseAllTraversableResolver as ValidatorFactory-scoped traversable resolver.

14:06:33.192 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.util.ExecutableParameterNameProvider as ValidatorFactory-scoped parameter name provider.

14:06:33.192 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.DefaultClockProvider as ValidatorFactory-scoped clock provider.

14:06:33.192 [background-preinit] DEBUG org.hibernate.validator.internal.engine.ValidatorFactoryImpl - HV000234: Using org.hibernate.validator.internal.engine.scripting.DefaultScriptEvaluatorFactory as ValidatorFactory-scoped script evaluator factory.

14:06:33.337 [main] ERROR org.springframework.boot.SpringApplication - Application run failed

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

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:545)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadForFileExtension(ConfigFileApplicationListener.java:494)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:464)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$null$7(ConfigFileApplicationListener.java:443)

at java.base/java.lang.Iterable.forEach(Iterable.java:75)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$load$8(ConfigFileApplicationListener.java:443)

at java.base/java.lang.Iterable.forEach(Iterable.java:75)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:440)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.lambda$load$0(ConfigFileApplicationListener.java:335)

at org.springframework.boot.context.config.FilteredPropertySource.apply(FilteredPropertySource.java:54)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:323)

at org.springframework.boot.context.config.ConfigFileApplicationListener.addPropertySources(ConfigFileApplicationListener.java:214)

at org.springframework.boot.context.config.ConfigFileApplicationListener.postProcessEnvironment(ConfigFileApplicationListener.java:198)

at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEnvironmentPreparedEvent(ConfigFileApplicationListener.java:188)

at org.springframework.boot.context.config.ConfigFileApplicationListener.onApplicationEvent(ConfigFileApplicationListener.java:176)

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:76)

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:1226)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)

at com.example.ExampleApplication.main(ExampleApplication.java:16)

Caused by: java.util.InvalidPropertiesFormatException: jdk.internal.org.xml.sax.SAXParseException; An XML properties document must contain the DOCTYPE declaration as defined by java.util.Properties.

at java.base/jdk.internal.util.xml.PropertiesDefaultHandler.load(PropertiesDefaultHandler.java:85)

at java.base/java.util.Properties.loadFromXML(Properties.java:962)

at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:137)

at org.springframework.core.io.support.PropertiesLoaderUtils.loadProperties(PropertiesLoaderUtils.java:122)

at org.springframework.boot.env.PropertiesPropertySourceLoader.loadProperties(PropertiesPropertySourceLoader.java:59)

at org.springframework.boot.env.PropertiesPropertySourceLoader.load(PropertiesPropertySourceLoader.java:47)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.loadDocuments(ConfigFileApplicationListener.java:562)

at org.springframework.boot.context.config.ConfigFileApplicationListener$Loader.load(ConfigFileApplicationListener.java:518)

... 25 common frames omitted

Caused by: jdk.internal.org.xml.sax.SAXParseException: An XML properties document must contain the DOCTYPE declaration as defined by java.util.Properties.

at java.base/jdk.internal.util.xml.PropertiesDefaultHandler.startElement(PropertiesDefaultHandler.java:160)

at java.base/jdk.internal.util.xml.impl.ParserSAX.parse(ParserSAX.java:470)

at java.base/jdk.internal.util.xml.impl.ParserSAX.parse(ParserSAX.java:411)

at java.base/jdk.internal.util.xml.impl.ParserSAX.parse(ParserSAX.java:374)

at java.base/jdk.internal.util.xml.impl.SAXParserImpl.parse(SAXParserImpl.java:97)

at java.base/jdk.internal.util.xml.PropertiesDefaultHandler.load(PropertiesDefaultHandler.java:83)

... 32 common frames omitted

Process finished with exit code 1

그리고 

https://stackoverflow.com/questions/29173614/loading-applicationcontext-xml-when-using-springapplication/37193379

위 링크를 보고 importSource 를 시도해 보았지만 결과는 같았습니다.

다시 테스트를 해보니 

ClassPathXmlApplicationContext  로 

컨테이너 생성 하고 Array.toString 까지 주석처리를 해도

application.xml 파일이 있으면 일단 오류가 발생하는것 같습니다.

xml 파일의 전체 내용 입니다.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="carService" class="com.example.CarService">
        <property name="carRepository" ref="carRepository" />
    </bean>
    <bean id="carRepository" class="com.example.CarRepository" />

</beans>