我的简单应用程序在添加LoggingAspectConfiguration类之前工作正常。源代码如下:(除去导入语句)@ @Aspect中的自动注入依赖注入LoggerContext为null
这是顶级
package com.rsa.tools.springmvc.configuration;
public class ApplicationInitialization extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { ApplicationRootClassConfiguration.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
return new Class[] { ApplicationWebConfiguration.class };
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
这是应用程序的根类,其中componentscan呈现
package com.rsa.tools.springmvc.configuration.backend;
@Configuration
@EnableAspectJAutoProxy
@ComponentScan(basePackages={"com.rsa.tools.springmvc.configuration.general", "com.rsa.tools.springmvc.configuration.backend", "com.rsa.tools.springmvc.dao", "com.rsa.tools.springmvc.service"})
public class ApplicationRootClassConfiguration {
}
的logback配置
package com.rsa.tools.springmvc.configuration.general;
@Configuration
public class ApplicationLogbackConfiguration {
@Bean
public LoggerContext getLoggerContext() { ... }
}
直到这里它工作正常。
后,我增加了以下类:
package com.rsa.tools.springmvc.configuration.general;
@Aspect
@Component
public class LoggingAspectConfiguration {
@Autowired
LoggerContext loggerCtx;
@Pointcut("execution(* *.*(..))")
protected void loggingOperation() {}
@Before("loggingOperation()")
@Order(1)
public void logJoinPoint(JoinPoint joinPoint) {
Logger logger = loggerCtx.getLogger(this.getClass());
logger.trace("Join point kind : " + joinPoint.getKind());
logger.info("Signature declaring type : "+ joinPoint.getSignature().getDeclaringTypeName());
logger.info("Signature name : " + joinPoint.getSignature().getName());
logger.info("Arguments : " + Arrays.toString(joinPoint.getArgs()));
logger.info("Target class : "+ joinPoint.getTarget().getClass().getName());
logger.info("This class : " + joinPoint.getThis().getClass().getName());
}
...
}
我开始看到空指针异常,因为loggerCtx依赖注入没有工作。如何解决这个问题?
'@ Order'是Spring的注释吗?你为什么在'logJoinPoint'方法上使用它? –
我删除它,仍然是同样的问题。 –