Spring ApplicationContextInitializer

applicationContext 초기화(refresh) 이전에 작업이 필요할 경우 ApplicationContextInitializer initialize 메소드에 구현하여 사용

public class XXInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {  
  @Override
  public void initialize(ConfigurableApplicationContext){  
          //로직 구현
  }  
} 

web.xml

<context-param>
    <param-name>contextInitializerClasses</param-name>
    <param-value>XXInitializer</param-value>
</context-param>