SpringBoot整合AOP实现打印方法执行时间切面

pom.xml

      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-aop</artifactId>
      </dependency>

代码

创建注解

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * 自定义的注解
 * @MethodExecutionTime
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface MethodExecutionTime {
}

AOP拦截注解

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

/**
 * 被@MethodExecutionTime注解的方法计算其执行时间并输出
 */
@Aspect
@Component
public class MethodExecutionTimeAspect {

    @Around("@annotation(com.*.annotation.MethodExecutionTime)")
    public Object logMethodExecutionTime(ProceedingJoinPoint joinPoint) throws Throwable {
        String methodName = joinPoint.getSignature().getName();
        long startTime = System.currentTimeMillis();
        Object result = joinPoint.proceed();
        long endTime = System.currentTimeMillis();
        System.out.println("Method: " + methodName + " Execution Time: " + (endTime - startTime) + " milliseconds");
        return result;
    }
}

使用

将@MethodExecutionTime用在Service、Component等呗spring容器托管的bean的方法上。实现方法执行时间的监测