Autowired アノテーションを機能させるのに問題があります。次の 2 つのクラスを参照してください。
@Component("upAuthenticationProvider")
public class UPAuthenticationProvider implements AuthenticationProvider {
@Autowired
private AuthenticationDAO authenticationDAO;
// snip
public AuthenticationDAO getAuthenticationDAO() {
return authenticationDAO;
}
public void setAuthenticationDAO(
AuthenticationDAO authenticationDAO) {
this.authenticationDAO = authenticationDAO;
}
}
および依存関係:
@Repository
public class AuthenticationPostgresDAO implements AuthenticationDAO{
@Autowired
private DataSource dataSource;
// snip...
}
アプリが初期化されると、ログに次のように表示されます。
08:09:41.268 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Creating shared instance of singleton bean 'upAuthenticationProvider'
08:09:41.268 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Creating instance of bean 'upAuthenticationProvider'
08:09:41.269 [pool-2-thread-1] DEBUG o.s.b.f.annotation.InjectionMetadata - Found injected element on class [com.mycompany.authentication.UPAuthenticationProvider]: AutowiredFieldElement for private com.mycompany.dao.AuthenticationDAO com.mycompany.authentication.UPAuthenticationProvider.AuthenticationDAO
08:09:41.269 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Eagerly caching bean 'upAuthenticationProvider' to allow for resolving potential circular references
08:09:41.271 [pool-2-thread-1] DEBUG o.s.b.f.annotation.InjectionMetadata - Processing injected method of bean 'upAuthenticationProvider': AutowiredFieldElement for private com.mycompany.dao.AuthenticationDAO com.mycompnay.authentication.UPAuthenticationProvider.AuthenticationDAO
08:09:41.273 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Creating shared instance of singleton bean 'AuthenticationPostgresDAO'
08:09:41.273 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Creating instance of bean 'AuthenticationPostgresDAO'
08:09:41.273 [pool-2-thread-1] DEBUG o.s.b.f.annotation.InjectionMetadata - Found injected element on class [com.mycompnay.dao.AuthenticationPostgresDAO]: AutowiredFieldElement for private javax.sql.DataSource com.mycompany.dao.AuthenticationPostgresDAO.dataSource
08:09:41.273 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Eagerly caching bean 'authenticationPostgresDAO' to allow for resolving potential circular references
08:09:41.273 [pool-2-thread-1] DEBUG o.s.b.f.annotation.InjectionMetadata - Processing injected method of bean 'authenticationPostgresDAO': AutowiredFieldElement for private javax.sql.DataSource com.mycompnay.dao.AuthenticationPostgresDAO.dataSource
08:09:41.274 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'dataSource'
08:09:41.274 [pool-2-thread-1] DEBUG o.s.b.f.a.AutowiredAnnotationBeanPostProcessor - Autowiring by type from bean name 'AuthenticationPostgresDAO' to bean named 'dataSource'
08:09:41.274 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Finished creating instance of bean 'authenticationPostgresDAO'
08:09:41.274 [pool-2-thread-1] DEBUG o.s.b.f.a.AutowiredAnnotationBeanPostProcessor - Autowiring by type from bean name 'upAuthenticationProvider' to bean named 'authenticationPostgresDAO'
08:09:41.274 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Finished creating instance of bean 'upAuthenticationProvider'
08:09:41.274 [pool-2-thread-1] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'authenticationPostgresDAO'
依存関係を作成して接続したと言っているようですが、私のアプリケーションでは、upAuthenticationProvider から authencticationPostgresDAO にアクセスしようとすると NPE が発生します。