Autowired Environment is null

Question

I have an issue with connecting environment to my Spring project. In this class

@Configuration @ComponentScan(basePackages = "my.pack.offer.*") @PropertySource("classpath:OfferService.properties") public class PropertiesUtil {     @Autowired     private Environment environment;        @Bean     public String load(String propertyName)     {         return environment.getRequiredProperty(propertyName);     } } 

environment always is null.

Answer 1

Autowiring happens later than load() is called (for some reason).

A workaround is to implement EnvironmentAware and rely on Spring calling setEnvironment() method:

@Configuration @ComponentScan(basePackages = "my.pack.offer.*") @PropertySource("classpath:OfferService.properties") public class PropertiesUtil implements EnvironmentAware {     private Environment environment;      @Override     public void setEnvironment(final Environment environment) {         this.environment = environment;     }      @Bean     public String load(String propertyName)     {         return environment.getRequiredProperty(propertyName);     } } 

Answer 2

Change @Autowired for @Resource (from javax.annotation) and make it public e.g.:

@Configuration @PropertySource("classpath:database.properties") public class HibernateConfigurer {      @Resource     public Environment env;      @Bean     public DataSource dataSource() {         BasicDataSource dataSource = new BasicDataSource();         dataSource.setDriverClassName(env.getProperty("database.driverClassName"));         dataSource.setUrl(env.getProperty("database.url"));         dataSource.setUsername(env.getProperty("database.username"));         dataSource.setPassword(env.getProperty("database.password"));         dataSource.setValidationQuery(env.getProperty("database.validationQuery"));          return dataSource;     } } 

And you must register your configurer class in WebApplicationInitializer this way

AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext(); context.register(ApplicationConfigurer.class); //ApplicationConfigurer imports HibernateConfigurer 

It's working for me! You may want to check a test project I made.