AOP切面编程

1. 添加pom依赖

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

2. 编写切面类

   /**
    * @author wsyjlly
    * @create 2019.06.14 - 17:23
    **/
   @Aspect
   public class LogAspect {
       @Pointcut("execution(* cn.wsyjlly.controller.*.*(..))")
       public void pc(){}
   
       @Before(value="pc()")
       public void before(JoinPoint jp){
           String name = jp.getSignature().getName();
           System.out.println(name+"方法开始执行...");
           System.out.println(name+"——————————————————————————————");
       }
   
       @After(value = "pc()")
       public void after(JoinPoint jp){
           String name = jp.getSignature().getName();
           System.out.println(name+"——————————————————————————————");
           System.out.println(name+"方法执行结束...");
       }
   
       @AfterReturning(value = "pc()" , returning = "result")
       public void afterReturning(JoinPoint jp,Object result){
           String name = jp.getSignature().getName();
           System.out.println(name+"方法返回值为："+result);
       }
   
       @AfterThrowing(value = "pc()" , throwing = "e")
       public void afterThrowing(JoinPoint jp,Exception e){
           String name = jp.getSignature().getName();
           System.out.println(name+"方法抛出异常："+e.getClass().getName());
       }
   
       @Around("pc()")
       public Object around(ProceedingJoinPoint pjp) throws Throwable{
           return pjp.proceed();
       }
   }