Reading values from application.properties Spring Boot

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My Spring boot app has this application structure:

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

This is my application.properties file:

logging.level.org.springframework=TRACE
logging.level.org.hibernate=ERROR
spring.resources.chain.strategy.content.enabled=true
spring.resources.chain.strategy.content.paths=/**
#spring.resources.chain.cache=false
#spring.resources.chain.html-application-cache=false
#spring.headers.cache=false
language=java

I have a class which requires the use of that language=java property. This is how I am trying to use it:

public class EntityManager {

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

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

That printed value is always "null" for some reason! I have also tried putting this on top of the class declaration:

@PropertySource(value = "classpath:application.properties")

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");
    }

}

Properties with Spring and Spring Boot, Another very simple way to read application properties is to use @Value annotation. Simply annotation the class field with @Value annotation providing the name of the property you want to read from application. properties file and class field variable will be assigned that value. In this post we will see how to read a value defined in the application.properties file in a Spring Boot application. In Spring Boot, we can use properties files, YAML files, environment variables, and command-line arguments to externalize our configuration. This is useful while working with the same application code in different environments. In this post, we will see how to read a value defined in the properties files. 1. @Value annotation

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.

Reading application.properties in Spring Boot, The Externalized Configuration section of the Spring Boot docs, Then wherever you want to read from application.properties, just pass the  How to read value from application.properties Using @Value Firstly we will learn how to read values using @Value annotation . If you new spring boot and then first learn create project in Spring boot .

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.

How to access a value defined in the application.properties file in , If that's what you're looking for, keep on reading. The application.properties file is nothing more than simple key-value storage for Spring Boot loads the application.properties file automatically from the project classpath. With this short blog post, I am going to share with you a few ways you can read application properties from application.properties file in Spring Boot. I am going to share 3 ways: Read application.properties using Environment object, Read a property from application.properties file using @ConfigurationProperties and reading a property using the @Value annotation. To demonstrate how…

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);
    }
}

Spring Boot application.properties file, @Value annotation can also be used to read application.properties. 2. Spring boot read application properties using @Value annotation 2.1 application.properties. 2.2 ApplicationService. Here we have used @Value annotation at Service layer but we can also use it at Controller and Component level. 2.3 Output: Domain: javadeveloperzone.com In this article, We have

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.

Spring boot read application properties, Look at the following example that shows the syntax to read the spring.​application.name property value in Java variable by using @Value annotation. @​Value("${  Spring boot provide the annotation @Value to read the property value from properties file. what you need to do is you just need to use @Value("${<property-key>}") where property-key will be replace by your property key whatever it is. ex- @Value({"${key1}")

Spring Boot - Application Properties, Spring Boot @ConfigurationProperties is letting developer maps the entire .​properties and yml file into an object easily. 1.1 Normally, we use the @Value to inject the .properties value one by less than or equal to 5 Action: Update your application's configuration Read all published posts by mkyong  The easiest way to read a value from the property file or yml is to use the spring @value annotation.Spring automatically loads all values from the yml to the spring environment , so we can directly use those values from the environment like : @Component public class MySampleBean { @Value("${name}") private String sampleName; //

Spring Boot @ConfigurationProperties example – Mkyong.com, Property values can be injected directly into your beans by using the @Value annotation, Profile-specific application properties outside of your packaged jar which are read before refresh begins. My project is using another project which has classes which needs to read configuration from application.properties. Mine is a maven project and a spring boot application having application.properties in src/main/resources folder and those properties values are defined in it. What is it that I am missing that it is unable to read file values?

Spring Boot Features, Property values can be injected directly into your beans using the @Value Spring Boot uses a very particular PropertySource order that is designed to allow Application properties outside of your packaged jar ( application.properties  Below snapshot depicts the Spring Boot project structure with property files in place – @ConfigurationProperties annotation provides the capability to map the property file entries into corresponding object while also supporting the hierarchical YML structure.

Comments
  • If my answer provided you the solution, please accept it.
  • It is still not working with the @PropertySource annotation. I am not sure why but I guess it cannot find the application.properties file? Is there a way to check what path the "classpath" refers to?
  • @aBrokenSniper, is application.properties available in classpath? what is the path of application.properties in your project?
  • @aBrokenSniper, alternatively you can use file path as well.. @PropertySource("file:/path/to/application.properties")
  • I put the application.properties in the default location suggested by spring docs: under src>main>resources>application.properties. It should be picked up by default right?
  • Yes, it should be picked up by default. If it doesn't then, try with file path as I commented above
  • Nice to know. If u are ok with it,then an upvote would be very appreciated
  • Does it have to be a component? I was reading this tutorial: link and they didn't use a Component. Is there any way I can grab the value from the properties file without using any stereotype annotations for the class?
  • it can be any one of the spring stereotype annotations. In that case you have get it from Environment by accessing the ApplicationContext statically inside your class or else make use of System.getProperty interms of JVM property.
  • stackoverflow.com/questions/10938529/…