title: How to load a properties file based on the server environment with spring so that the values can be injected?
body: <p>To my surprise I have had a difficult time finding an answer to this question. I have Seen many examples where you can use @PropertySource to load a specific properties file for a class. I have also seen examples where you can easily add different property files in spring boot projects. But what I want to do is to do this for a spring project that is NOT spring boot and load a properties file so that the values of this file can be injected in classes annotated with @Component which is dependent on the server environment. So for example if I am on development server I want a particular properties file loaded and on production a different properties file.  The reason that I am doing it like this is because my data and service layers are their own modules. These modules contain their own unit tests and can be imported as their own modules in other spring boot projects. I need properties files to be loaded to serve these modules which use spring but not spring boot. I have tried the following, but this does not work.</p>
  
  <pre><code>@Configuration
  @Profile("test")
  @EnableJpaRepositories("com.hi.repository")
  @EnableTransactionManagement
  @EnableScheduling
  public class InfrastructureConfig  {
  ...
      @Bean
      public static PropertySourcesPlaceholderConfigurer placeHolderConfigurer() {
          PropertySourcesPlaceholderConfigurer configurer = new PropertySourcesPlaceholderConfigurer();
          Map&lt;String, String&gt; env = System.getenv();
          String propertiesFile=null;
  
          String e = env.get("SERVER_ENV");
  
          if (e.equals("dev")) {
              propertiesFile = "environment/development.properties";
          } else if (e.equals("prod")) {
              propertiesFile = "environment/production.properties";
          }
  
          configurer.setLocation(new ClassPathResource(propertiesFile));
  
  
          return configurer;
  
      }
  </code></pre>
  
  <p>Then I have a test which looks like this</p>
  
  <pre><code>@RunWith(SpringJUnit4ClassRunner.class)
  @ContextConfiguration(locations = {"classpath:/spring/DealServiceTest-context.xml"})
  @ActiveProfiles("test")
  public class LogTest {
  
      private static final Logger log = LogManager.getLogger(LogTest.class);
  
      @Autowired
      PathsService pathsService;
  
      @Autowired
      Environment environment;
  
  
      @Test
      public void testBeans(){
          System.out.println("********** WASSUP from LogTest");
          System.out.println(environment.getProperty("imageBucket"));
  
      }
  </code></pre>
  
  <p>Although the test prints out null which indicates to me the properties file has not been loaded and prepared for its values to be injected. How can I achieve this?</p>