Reading values from application.properties Spring Boot

Question

My Spring boot app has this application structure:

• src
  • main
    • java
    • resources
      • application.properties
    <

Answer 1

OK I figured it out with acts of desperation. I added the

@PropertySource("classpath:application.properties") 

attribute but it still wasn't working for some reason.

I then deleted the "static" modifier and it worked!

I am not sure why it works without "static" being there but it does. If can explain it to me that would be wonderful because this is all confusing.

Answer 2

If you are using Spring boot you do not need @PropertySource("classpath:application.properties") if you are using spring boot starter parent , just remove the static keyword and it should start working.

Answer 3

It can be achieved in multiple ways, refer below.

@Configuration
@PropertySource("classpath:application.properties")
public class EntityManager {

    @Value("${language}")
    private static String newLang;

    @Bean
    public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
        return new PropertySourcesPlaceholderConfigurer();
    }

}

OR

@Configuration
@PropertySource("classpath:application.properties")
public class EntityManager {

    @Autowired
    private Environment env;

    public void readProperty() {
        env.getProperty("language");
    }

}

Answer 4

Missing stereotype annotation on top of class

@Component
public class EntityManager {

    @Value("${language}")
    private static String newLang;

    public EntityManager(){
        System.out.println("langauge is: " + newLang);
    }
}

Answer 5

you can try to use @PropertySource and give it the path to property file, you can find the sample below:

@Component
@PropertySource("classpath:application.properties")
public class EntityManager {

    @Value("${language}")
    private static String newLang;

    public EntityManager(){
        System.out.println("langauge is: " + newLang);
    }
}

Answer 6

Sometimes, the classpath entry for src/main/resources contains an exclude tag. If application.properties is present in this list of excluded items then @PropertySource("classpath:application.properties") will not be able to find the property file.

Either remove the exclude entry from [.classpath][1] file for src/main/resources manually, or use the Configure build path option in Eclipse and go to Source tab. Then remove the exclude entry from src.