Tomcat Not reading Spring-Boot Application Properties

Question

I\'m fairly new to spring/java and have been checking out spring-boot for a project I have at work. I\'ve been following guides and finally have a (semi) working web app MVC

Answer 1

The problem is that you attempt to use a @Value annotation inside your @Configuration class. From the JavaDoc of the @PropertySource:

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.

e.g. add the following lines to the @Configuration class:

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

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However, in your example, a more suitable approach is to move the @Configuration annotation from the GreetingController class (it does not contain any configuration) to the Application class. Since the Application class does not contain any @Value annotation it should work without the suggested addition of the static PropertySourcesPlaceholderConfigurer bean.