java 使用 Spring AOP 记录方法条目
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Log method entries with Spring AOP
提问by kenn3th
Anyone has any idea on how to log method entries(including parameters value) and exit with Spring AOP and log4j at trace level. It should be able to log classes from multiple packages.
任何人都知道如何记录方法条目（包括参数值）并在跟踪级别使用 Spring AOP 和 log4j 退出。它应该能够记录来自多个包的类。
采纳答案by Sai Ye Yan Naing Aye
回答by dimas
You can use @Around(..)aspect for such purposes:
您可以将@Around(..)方面用于此类目的：
@Component
@Aspect
@Order(value=2)
public class LoggingAspect {
@Around("execution(* com.blablabla.server..*.*(..))")
public Object logMethod(ProceedingJoinPoint joinPoint) throws Throwable{
final Logger logger = LoggerFactory.getLogger(joinPoint.getTarget().getClass().getName());
Object retVal = null;
try {
StringBuffer startMessageStringBuffer = new StringBuffer();
startMessageStringBuffer.append("Start method ");
startMessageStringBuffer.append(joinPoint.getSignature().getName());
startMessageStringBuffer.append("(");
Object[] args = joinPoint.getArgs();
for (int i = 0; i < args.length; i++) {
startMessageStringBuffer.append(args[i]).append(",");
}
if (args.length > 0) {
startMessageStringBuffer.deleteCharAt(startMessageStringBuffer.length() - 1);
}
startMessageStringBuffer.append(")");
logger.trace(startMessageStringBuffer.toString());
StopWatch stopWatch = new StopWatch();
stopWatch.start();
retVal = joinPoint.proceed();
stopWatch.stop();
StringBuffer endMessageStringBuffer = new StringBuffer();
endMessageStringBuffer.append("Finish method ");
endMessageStringBuffer.append(joinPoint.getSignature().getName());
endMessageStringBuffer.append("(..); execution time: ");
endMessageStringBuffer.append(stopWatch.getTotalTimeMillis());
endMessageStringBuffer.append(" ms;");
logger.trace(endMessageStringBuffer.toString());
} catch (Throwable ex) {
StringBuffer errorMessageStringBuffer = new StringBuffer();
// Create error message
logger.error(errorMessageStringBuffer.toString(), e)
throw ex;
}
return retVal;
}
}
In this example around aspect logs all method calls for all subpackages under com.blablabla.serverpackage. Also it logs all method input parameters.
在此示例中，方面记录了com.blablabla.server包下所有子包的所有方法调用。它还记录所有方法输入参数。
