我正在将spring boot 1.3.3项目升级到1.4.2。
升级项目后，Spring启动将不再使用任何application.properties文件。它找不到它。即使作为启动论证传递。
该项目是使用gradle和shadowjar插件构建的，用于编译到胖jar并启动从jar中嵌入的tomcat。
应用程序的启动方式是：java -jar app-all.jar。包含jar的目录还包含application.properties文件。 （没有其他文件）
没有设置类路径，并且jar文件不包含任何其他application.properties文件。 （使用unzip -t app-all.jar | grep application.properties进行测试）
在Spring Boot 1.3.3下启动项目。应用程序正确启动。开始记录日志文件：
04:15:58.846 com.app.MaxApplication INFO [main] - Starting MaxApplication on test-ng with PID 30096 (/home/ubuntu/app-all.jar started by ubuntu in /home/ubuntu) 04:15:58.850 com.app.MaxApplication DEBUG [main] - Running with Spring Boot, Spring 04:15:58.850 com.app.MaxApplication INFO [main] - The following profiles are active: TEST 04:15:58.850 org.springframework.boot.SpringApplication DEBUG [main] - Loading source class com.app.MaxApplication 04:15:58.947 org.springframework.boot.context.config.ConfigFileApplicationListener DEBUG [main] - Activated profiles TEST 04:15:58.947 org.springframework.boot.context.config.ConfigFileApplicationListener DEBUG [main] - Loaded config file 'file:./application.properties'
将Spring引导版本更改为1.4.2，清除gradle缓存以及重建和运行应用程序的方式与Spring Boot无法加载applciation.properties文件相同，并且由于缺少文件提供的配置设置，应用程序无法启动。开始记录日志文件：
01:48:47.547 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [servletConfigInitParams] PropertySource with lowest search precedence 01:48:47.549 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [servletContextInitParams] PropertySource with lowest search precedence 01:48:47.551 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [systemProperties] PropertySource with lowest search precedence 01:48:47.552 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [systemEnvironment] PropertySource with lowest search precedence 01:48:47.552 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Initialized StandardServletEnvironment with PropertySources [servletConfigInitParams,servletContextInitParams,systemProperties,systemEnvironment] 01:48:47.552 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'spring.profiles.active' in any property source 01:48:47.552 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'spring.profiles.active' in any property source 01:48:47.554 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'banner.image.location' in any property source 01:48:47.555 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'banner.location' in any property source 01:48:47.556 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'banner.charset' in any property source 01:48:47.557 [main] DEBUG org.springframework.core.env.MutablePropertySources - Adding [version] PropertySource with lowest search precedence 01:48:47.560 [main] DEBUG org.springframework.core.env.MutablePropertySources - Adding [ansi] PropertySource with highest search precedence 01:48:47.561 [main] DEBUG org.springframework.core.env.MutablePropertySources - Adding [title] PropertySource with highest search precedence 01:48:47.600 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [servletConfigInitParams] PropertySource with lowest search precedence 01:48:47.600 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [servletContextInitParams] PropertySource with lowest search precedence 01:48:47.600 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [systemProperties] PropertySource with lowest search precedence 01:48:47.600 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Adding [systemEnvironment] PropertySource with lowest search precedence 01:48:47.601 [main] DEBUG org.springframework.web.context.support.StandardServletEnvironment - Initialized StandardServletEnvironment with PropertySources [servletConfigInitParams,servletContextInitParams,systemProperties,systemEnvironment] 01:48:47.637 [main] DEBUG org.springframework.context.annotation.ClassPathBeanDefinitionScanner - JSR-250 'javax.annotation.ManagedBean' found and supported for component scanning 01:48:47.649 [main] INFO com.app.MaxApplication - Starting MaxApplication on test-ng (/home/ubuntu/app-all.jar started by ubuntu in /home/ubuntu) 01:48:47.649 [main] DEBUG com.app.max.MaxApplication - Running with Spring Boot, Spring 01:48:47.650 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'spring.profiles.active' in any property source 01:48:47.650 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'spring.profiles.default' in any property source 01:48:47.650 [main] INFO com.app.max.MaxApplication - No active profile set, falling back to default profiles: default 01:48:47.650 [main] DEBUG org.springframework.boot.SpringApplication - Loading source class com.app.MaxApplication
当前目录中只有两个文件是application.properties文件和jar文件。 externalizing configration documentation表示应该从那里读取配置。它也适用于Spring 1.3.3
我已经定义了一个配置类（这在1.3中工作）
@Component
@Configuration
@SpringBootConfiguration
public class MaxApplicationProperties {
@Bean
public static PropertySourcesPlaceholderConfigurer propertyPlaceholderConfigurer() {
return new PropertySourcesPlaceholderConfigurer();
}
}
我试过了：
这些选项都不能使Spring启动尝试使用与Spring boot 1.3相同的application.properties文件。
任何人都知道我错过了什么？感谢。