AspectJ环绕通知

谁践踏了优雅 2022-05-09 12:36 243阅读 0赞

AspectJ的好处是可以将所有的通知写到一个类中，二schema-based需要不同的类实现不同的接口  
例如

public class MyAdvice {
    	public void beforeMethod() {
    		System.out.println("before");
    	}
    	public void afterMethod() {
    		System.out.println("after");
    	}
    	public void after_returning_Method() {
    		System.out.println("after_returning");
    	}
    	public void throwMethod() {
    		System.out.println("throw");
    	}
    	public Object aroundMethod(ProceedingJoinPoint pj) throws Throwable{
    		System.out.println("around before");
    		Object result = pj.proceed();
    		System.out.println("around after");
    		return result;
    	}
    }

配置xml

切点类

public class DemoService {
    	public void demoMethod() {
    		//int i = 5/0;
    		System.out.println("DemoMethod execute");
    	}
    }

当切点没有错误时，结果如下

before
    around before
    DemoMethod execute
    around after
    after
    after_returning

当有错误时

before
    around before
    throw
    after
    Exception in thread "main" java.lang.ArithmeticException: / by zero

可见当有没有错误，<aop:after/>标签始终执行