How to read application.properties file without Environment

Question

Please can you help me to read the properties from application.properties file in Spring Boot, without autowiring the Environment and without using the Environment?

No need to use ${propname} either. I can create properties object but have to pass my properties file path. I want to get my prop file from another location.

Answer 1

This is a core Java feature. You don't have to use any Spring or Spring Boot features if you don't want to.

Properties properties = new Properties();
try (InputStream is = getClass().getResourceAsStream("application.properties")) {
  properties.load(is);
}

JavaDoc: http://docs.oracle.com/javase/8/docs/api/java/util/Properties.html

Answer 2

OrangeDog solution didn't work for me. It generated NullPointerException.

I've found another solution:

ClassLoader loader = Thread.currentThread().getContextClassLoader();
Properties properties = new Properties();
try (InputStream resourceStream = loader.getResourceAsStream("application.properties")) {
    properties.load(resourceStream);
} catch (IOException e) {
    e.printStackTrace();
}