Spring案例：测量业务层接口万次执行效率

import com.itheima.config.SpringConfig;
import com.itheima.domain.Account;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.List;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfig.class)
public class AccountServiceTestCase {
    @Autowired
    private AccountService accountService;
    @Test
    public void testFindById(){
        Account ac = accountService.findById(2);
        System.out.println(ac);
    }
    @Test
    public void testFindAll(){
        List<Account> all = accountService.findAll();
        System.out.println(all);
    }
}

@EnableAspectJAutoProxy
public class SpringConfig {
}

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
@Component
@Aspect
public class ProjectAdvice {
    //匹配业务层的所有方法
    @Pointcut("execution(* com.itheima.service.*Service.*(..))")
    private void servicePt(){}
    //设置环绕通知，在原始操作的运行前后记录执行时间
    @Around("ProjectAdvice.servicePt()")
    public void runSpeed(ProceedingJoinPoint pjp) throws Throwable {
        //获取执行的签名对象
        Signature signature = pjp.getSignature();
        //通过签名获取执行类型（接口名）
        String className = signature.getDeclaringTypeName();
        //通过签名获取执行操作名称（方法名）
        String methodName = signature.getName();
        long start = System.currentTimeMillis();
        for (int i = 0; i < 10000; i++) {
           pjp.proceed();
        }
        long end = System.currentTimeMillis();
        System.out.println("万次执行："+ className+"."+methodName+"---->" +(end-start) + "ms");
    }
}