springboot 使用自定义的aspect的示例代码

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

@Aspect
@Component
@Slf4j
public class TestAspect {

 /**
  * 对TestService类下面的所有方法拦截.
  */
 @Pointcut("execution(* com.lind.start.test.aop.TestService.*(..))")
 public void pointcut() {
 }

 //前置通知
 @Before("pointcut()")
 public void beforeMethod(JoinPoint joinPoint) {
  if (joinPoint.getArgs().length == 1 && joinPoint.getArgs()[0] instanceof User) {
   User user = (User) joinPoint.getArgs()[0];
   user.setUsername("aop赋值");
   log.info("调用了前置通知" + user.toString());
  }

 }

 //@After: 后置通知
 @After("pointcut()")
 public void afterMethod(JoinPoint joinPoint) {
  log.info("调用了后置通知");
 }

 //@AfterRunning: 返回通知 result为返回内容
 @AfterReturning(value = "pointcut()", returning = "result")
 public void afterReturningMethod(JoinPoint joinPoint, Object result) {
  log.info("调用了返回通知");
 }

 //@Around：环绕通知
 @Around("pointcut()")
 public Object Around(ProceedingJoinPoint pjp) throws Throwable {
  log.info("around执行方法之前");
  Object object = pjp.proceed();
  log.info("around执行方法之后--返回值：" + object);
  return object;
 }

}

@SpringBootTest
@RunWith(SpringRunner.class)
public class AopTest {
 @Autowired
 TestService testService;

 @Test
 public void test() {
  testService.print(new User());
 }
}