Default properties configured on SpringApplication have higher precedence than properties configured with @PropertySource #31068
Description
The Externalized Configuration section of the reference documentation say that order of default properties (SpringApplication.setDefaultProperties()) is lower with @PropertySource, but my test is inconsistent.
My Spring Boot is 2.6.7.
My Test 1
@SpringBootApplication
@PropertySource(value = "classpath:/api.properties")
public class Demo6Application {
public static void main(String[] args) {
SpringApplication application = new SpringApplication(Demo6Application.class);
Properties properties = new Properties();
properties.setProperty("api.name","default");
application.setDefaultProperties(properties);
ConfigurableApplicationContext run = application.run(args);
String property = run.getEnvironment().getProperty("api.name");
System.out.println(String.format("api.name=%s",property));
}
}api.properties
api.name=api
My Result 1
api.name=default
api.properties may be not loaded in My Test 1,so I print PropertySources of Environment in console.
My Test 2
@SpringBootApplication
@PropertySource(value = "classpath:/api.properties")
public class Demo6Application {
public static void main(String[] args) {
SpringApplication application = new SpringApplication(Demo6Application.class);
Properties properties = new Properties();
properties.setProperty("api.name","default");
application.setDefaultProperties(properties);
ConfigurableApplicationContext run = application.run(args);
run.getEnvironment().getPropertySources().forEach(System.out::println);
}
}My Result 2
ConfigurationPropertySourcesPropertySource {name='configurationProperties'}
PropertiesPropertySource {name='systemProperties'}
OriginAwareSystemEnvironmentPropertySource {name='systemEnvironment'}
RandomValuePropertySource {name='random'}
CachedRandomPropertySource {name='cachedrandom'}
MapPropertySource {name='springCloudClientHostInfo'}
DefaultPropertiesPropertySource {name='defaultProperties'}
ResourcePropertySource {name='class path resource [api.properties]'}
My Thought
Spring Boot 2.4 before, the order is achieved by ConfigFileApplicationListener$PropertySourceOrderingPostProcessor, but Spring Boot 2.4 after, I cannot find a BeanFactoryPostProcessor to do that.