CODEWITHSUNDEEP
javaspringspring-boot
ketrab321
ketrab321

Reputation: 591

Spring boot PropertySourcesPlaceHolderConfigurer with @ProperySource

I have a simple question about PropertySourcesPlaceholderConfigurer and @PropertySource annotation. I have simple class with bean. I would like to inject property from application.properties and some another test.properties wiht @Value annotation. I read in several sources that @PropertySource needs to define staticPropertySourcesPlaceholderConfigurer bean. From documentation:

In order to resolve ${...} placeholders in definitions or @Value annotations using properties from a PropertySource, one must register a PropertySourcesPlaceholderConfigurer. This happens automatically when using in XML, but must be explicitly registered using a static @Bean method when using @Configuration classes.

But for me it works fine without this bean. Is Spring in some way auto configures PropertySourcesPlaceholderConfigurer at application startup? Here is my simple example (first property is from application.properties and second from test.properties):

@Configuration
@PropertySource("classpath:test.properties")
public class AppConfiguration {

    @Value("${first.property}")
    private String firstProp;

    @Value("${second.property}")
    private String secondProp;

    @Bean
    public TestModel getModel() {
        TestModel model = new TestModel();
        model.setFirstProperty(firstProp);
        model.setSecondProperty(secondProp);
        return model;
    }
}

Upvotes: 2

Views: 3973

Answers (1)

Karol Dowbecki
Karol Dowbecki

Reputation: 44942

The static PropertySourcesPlaceholderConfigurer bean is registered automatically when missing by PropertyPlaceholderAutoConfiguration class which appears to be introduced in Spring Boot 1.5.0.RELEASE (as there is no on-line javadoc for it in the previous releases).

Interestingly this new auto configuration is not mentioned in Spring Boot 1.5 Release Notes.

Upvotes: 2

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