spring aop五种通知及通知中传递参数!

定义切面(包含五种通知):

import org.aspectj.lang.ProceedingJoinPoint;

public class MyXmlServiceAop {

    public void beforeHandler(String name, int age) {
        System.out.println("前置通知:" + name + ":age=" + age);
    }

    public void aroundHandler(ProceedingJoinPoint jointPoint) {
        try {
            System.out.println("环绕通知开始");
            String name = (String) jointPoint.proceed();
            jointPoint.proceed();
            System.out.println(name + "环绕通知结束");
        } catch (Throwable e) {
            
        }
    }

    public void afterHandler() {
        System.out.println("后置通知");
    }
    
    public void returnHandler(Object name) { //在返回通知中获取返回值
        System.out.println("返回通知:" + name);
    }

    public void throwExceptionHandler(Throwable ex) {
        System.out.println("异常通知:" + ex.getMessage());
    }
}

定义service及切点方法:

public interface MyXmlService {
    
    String handlerXml(String name, int age);
}

public class MyXmlServiceImpl implements MyXmlService {

    public String handlerXml(String name, int age) {
        //int a = 1 / 0; //异常通知模拟
        System.out.println(name + ":xml处理类!");
        return name;
    }

    
}

application-context.xml:

main测试类:

public class Main {
    
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("application-context.xml");
        MyXmlService service = (MyXmlService) context.getBean("myXmlService");
        String name = service.handlerXml("t6", 25);
        System.out.println(name);
    }
}

值得注意的是，当使用环绕通知后，返回通知和方法返回值中是获取不到切点方法的返回值的，因为在环绕通知中已调用切点方法。