springbootの@EnableConfigurationPropertiesが

Question

を動作しない、私はここで

@EnableConfigurationProperties and @ConfigurationProperties. 

を使用してapplication.propertiesを読みたいコードです：

TraceLogProperties.java: 

@ConfigurationProperties("tracelog") 
public @Data class TraceLogProperties { 

    private Boolean enable; 

    ...some other fields. 

} 

TraceLogAutoConfigure.java: 

@Configuration @Slf4j 
@EnableConfigurationProperties(TraceLogProperties.class) 
@AutoConfigureAfter(WebConfig.class) 
public class TraceLogAutoConfigure { 

    private @Autowired TraceLogProperties traceLogProperties; 

    @ConditionalOnProperty(name = "tracelog.repository.enable", havingValue = "true") 
    @Bean("repositoryInterceptor") 
    public Interceptor repositoryInterceptor() { 
     log.info("init repositoryInterceptor..."); 
     return new TraceLogInterceptor(this.traceLogProperties.getRepository()); 
    } 

    @ConditionalOnProperty(name = "tracelog.service.enable", havingValue = "true") 
    @Bean("serviceInterceptor") 
    public Interceptor serviceInterceptor() { 
     log.info("init serviceInterceptor..."); 
     return new TraceLogInterceptor(this.traceLogProperties.getService()); 
    } 

    @ConditionalOnProperty(name = "tracelog.controller.enable", havingValue = "true") 
    @Bean("controllerInterceptor") 
    public Interceptor controllerInterceptor() { 
     log.info("init controllerInterceptor..."); 
     return new TraceLogInterceptor(this.traceLogProperties.getController()); 
    } 

    @ConditionalOnProperty(name = "tracelog.repository.enable", havingValue = "true") 
    public @Bean Advisor repositoryAdvisor() { 
     log.info("init repositoryAdvisor..."); 
     AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut(); 
     pointcut.setExpression(this.traceLogProperties.getRepository().getPointcut()); 
     return new DefaultPointcutAdvisor(pointcut, repositoryInterceptor()); 
    } 

    @ConditionalOnProperty(name = "tracelog.service.enable", havingValue = "true") 
    public @Bean Advisor serviceAdvisor() { 
     log.info("init serviceAdvisor..."); 
     AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut(); 
     pointcut.setExpression(this.traceLogProperties.getService().getPointcut()); 
     return new DefaultPointcutAdvisor(pointcut, serviceInterceptor()); 
    } 

    @ConditionalOnProperty(name = "tracelog.controller.enable", havingValue = "true") 
    public @Bean Advisor controllerAdvisor() { 
     log.info("init controllerAdvisor..."); 
     AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut(); 
     pointcut.setExpression(this.traceLogProperties.getController().getPointcut()); 
     return new DefaultPointcutAdvisor(pointcut, controllerInterceptor()); 
    } 
} 

その後、私は、アプリケーションを起動したとき、それは常に

にNullPointerExceptionが発生しました

pointcut.setExpression(this.traceLogProperties.getController().getPointcut()); 

デバッグすると、this.traceLogPropertiesがnullであることがわかりました。しかし、2人のアドバイザーを削除すると、次のように正常になります。

@Configuration @Slf4j 
@EnableConfigurationProperties(TraceLogProperties.class) 
@AutoConfigureAfter(WebConfig.class) 
public class TraceLogAutoConfigure { 

    private @Autowired TraceLogProperties traceLogProperties; 

    @ConditionalOnProperty(name = "tracelog.repository.enable", havingValue = "true") 
    @Bean("repositoryInterceptor") 
    public Interceptor repositoryInterceptor() { 
     log.info("init repositoryInterceptor..."); 
     return new TraceLogInterceptor(this.traceLogProperties.getRepository()); 
    } 

    @ConditionalOnProperty(name = "tracelog.service.enable", havingValue = "true") 
    @Bean("serviceInterceptor") 
    public Interceptor serviceInterceptor() { 
     log.info("init serviceInterceptor..."); 
     return new TraceLogInterceptor(this.traceLogProperties.getService()); 
    } 

    @ConditionalOnProperty(name = "tracelog.controller.enable", havingValue = "true") 
    @Bean("controllerInterceptor") 
    public Interceptor controllerInterceptor() { 
     log.info("init controllerInterceptor..."); 
     return new TraceLogInterceptor(this.traceLogProperties.getController()); 
    } 

    @ConditionalOnProperty(name = "tracelog.controller.enable", havingValue = "true") 
    public @Bean Advisor controllerAdvisor() { 
     log.info("init controllerAdvisor..."); 
     AspectJExpressionPointcut pointcut = new AspectJExpressionPointcut(); 
     pointcut.setExpression(this.traceLogProperties.getController().getPointcut()); 
     return new DefaultPointcutAdvisor(pointcut, controllerInterceptor()); 
    } 
} 

ご存知ですか？私は何が欠けていますか？

Answer 1

コンポーネントとしてごTraceLogPropertiesをマーキングしてみてください。

@Component 
@ConfigurationProperties("tracelog") 
public @Data class TraceLogProperties {