Spring入门之AOP实践：@Aspect + @Pointcut + @Before / @Around / @After

 1 // MainController.java
 2 @RestController
 3 public class MainController {
 4     RequestMapping(value="/doSomething", method = RequestMethod.POST)
 5     @CrossOrigin("*")
 6     public void doSomething() { 
 7         System.out.println("This is doSomething"); 
 8         test();
 9     }
10 
11     @RequestMapping(value="/justTest", method = RequestMethod.POST)
12     @CrossOrigin("*")
13     public void test() { System.out.println("This is test");}
14 }

 1 // ExampleAop.java
 2 @Component
 3 @Aspect
 4 @Order(1)
 5 public class ExampleAop {
 6 
 7     private static final Logger LOGGER = LoggerFactory.getLogger(ExampleAop.class);
 8 
 9     // 匹配com.example.demo包及其子包下的所有类的所有方法
10     @Pointcut("execution(* com.example.demo..*.*(..))")
11     public void executeService() {
12     }
13 
14     @Before("executeService()")
15     public void doBeforeAdvice(JoinPoint joinPoint) throws Exception {
16         LOGGER.info("Before [{}]", joinPoint.getSignature().getName());
17     }
18 
19     @Around("executeService()")
20     public void doAroundAdvice(ProceedingJoinPoint joinPoint) throws Throwable {
21         LOGGER.info("Around1 [{}]", joinPoint.getSignature().getName());
22         joinPoint.proceed();
23         LOGGER.info("Around2 [{}]", joinPoint.getSignature().getName());
24     }
25 
26     @After("executeService()")
27     public void doAfterAdvice(JoinPoint joinPoint) throws Exception {
28         LOGGER.info("After [{}]", joinPoint.getSignature().getName());
29     }
30 
31     @AfterReturning("executeService()")
32     public void doAfterReturningAdvice(JoinPoint joinPoint) throws Exception {
33         LOGGER.info("AfterReturning [{}]", joinPoint.getSignature().getName());
34     }
35 }

1 # 调用接口
2 curl localhost:8080/doSomething

1 <!-- 后台日志 -->
2 com.example.demo.aop.ExampleAop          : Around1 [doSomething]
3 com.example.demo.aop.ExampleAop          : Before [doSomething]
4 This is doSomething
5 This is test
6 com.example.demo.aop.ExampleAop          : Around2 [doSomething]
7 com.example.demo.aop.ExampleAop          : After [doSomething]
8 com.example.demo.aop.ExampleAop          : AfterReturning [doSomething]

1 execution(public * com.example.demo.ExampleClass.*(..))  // ExampleClass的所有公有方法
2 execution(* com.example.demo..*.*(..)) // com.example.demo包及其子包下的所有方法
3 logSender() || logMessage() // 两个签名的表达式的并集