问Spring:为什么Bean在注入过程中解析为null？

EN

    @Component
    public class BasicAuthAuthorizationInterceptor extends SoapHeaderInterceptor {

        private static final Logger log = LoggerFactory.getLogger(BasicAuthAuthorizationInterceptor.class);

        @Value("#{${accepted.username.pass1}}")
        private Map<String,String> authMap;

        @Override
        public void handleMessage(Message message) throws Fault {
            AuthorizationPolicy policy = message.get(AuthorizationPolicy.class);

            if (policy == null) {
                sendErrorResponse(message, HttpURLConnection.HTTP_UNAUTHORIZED);
                return;
            }

            String username = policy.getUserName();
            String password = policy.getPassword();

            // CHECK USERNAME AND PASSWORD
            if (!checkLogin(username,password)) {

                 sendErrorResponse(message, HttpURLConnection.HTTP_FORBIDDEN);
            }
        }

        public boolean checkLogin(String username, String password) {
            MapUtils.debugPrint(System.out, "Map: " , authMap);

            if (authMap.containsKey(username.trim()) && password.trim().equals(authMap.get(username).trim())) {
                return true;
            }
            return false;
        }
   //some other methods
    }

@RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = SpumConfig.class)
public class BasicAuthAuthorizationInterceptorTest {

    private static final Logger log = LoggerFactory.getLogger(BasicAuthAuthorizationInterceptorTest.class);

    @Autowired
    BasicAuthAuthorizationInterceptor basicAuthAuthorizationInterceptor;
    @Test
    public void handleMessage() throws Exception {
       log.info(String.valueOf(basicAuthAuthorizationInterceptor.checkLogin("abc", "321")));
    }}

Map:  = null

    @Configuration
    @ComponentScan(basePackages = {"com.comp.spum"})
    @PropertySource("classpath:spum-${env}.properties")
    public class spumConfig {
      private static final Logger log = LoggerFactory.getLogger(spumConfig.class);

        @Autowired
        Environment environment;
        @Autowired
        spumCommons spumCommons;


  @Bean
    public String appProps() {
        log.info("test.db.url = " + environment.getProperty("test.db.url"));
        return null;
    }

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

    }