Spring Boot: Load @Value from YAML file

Question

I need to load a property from a .yml file, which contains the path to a folder where the application can read files from.

I'm using the following code to inject the property:

@Value("${files.upload.baseDir}") private String pathToFileFolder; 

The .yml file for development is located under src/main/resources/config/application.yml, im running the application with the following command in production, to override the development settings:

java -jar app.jar --spring.config.location=/path/to/application-production.yml 

The Spring Boot documentation says:

SpringApplication will load properties from application.properties files in the following locations and add them to the Spring Environment:

1. A /config subdirectory of the current directory.

2. The current directory

3. A classpath /config package

4. The classpath root

As well as:

You can also use YAML ('.yml') files as an alternative to '.properties'.

The .yml file contains:

{...} files:       upload:         baseDir: /Users/Thomas/Code/IdeaProjects/project1/files {...} 

And my Application class is annotated with:

@SpringBootApplication @EnableCaching 

When I run the application, i get an exception:

Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'files.upload.baseDir' in string value "${files.upload.baseDir}" 

Do I have to use the YamlPropertySourceLoader class or add a special annotation to enable the support for .yml in Spring Boot?

Edit: The .yml file contains some other properties, which get successfully loaded by Spring Boot like dataSource.XXXor hibernate.XXX.

Answer 1

For example: application.yml

key:  name: description here 

Your Class:

@Value("${key.name}") private String abc; 

Answer 2

M. Deinum is right, the setup i've provided is working - the yml file was indented wrong, so the property couldn't be found.