通过cglab 实现 Spring AOP

• • 1新建一个目标类

    public class StudentService {
    
        public void delete(){
            System.out.println("删除学生");
        }
        public void add(){ System.out.println("添加学生"); }
        public void update(){
            System.out.println("更新学生");
        }
    }

    
     切面类：  增强代码与切入点结合
    

    public class MyAspect {
    public void before(){
    System.out.println("开启事务");
        }
    public void after(){
    System.out.println("提交事务");
        }
    }

    2.新建一个工厂类

    public class MyBeanFactory {
    
    

    public static  StudentService createStudentService(){
            //1创建对象
            final StudentService studentService= new StudentService();
            System.out.println(studentService);
            //2声明切面类对象
            final   MyAspect aspect=new MyAspect();
            //3 创建增强对象
            Enhancer enhancer= new Enhancer();
            //4 设置父类
            enhancer.setSuperclass(studentService.getClass());
            //设置回调 拦截
            enhancer.setCallback(new MethodInterceptor() {
                @Override
                public Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
                    /**
                     * class com.zz.service.StudentService$$EnhancerByCGLIB$$c7d7b405
                     * org.springframework.cglib.proxy.MethodProxy@53bbfa
                     */
    
                  //  System.out.println(o.getClass());
                    System.out.println(methodProxy);
    
                    aspect.before();
    
                    //放行
    
         　　        Object retObj = methodProxy.invokeSuper(proxy,args);
                    aspect.after();
                    System.out.println("拦截....");
                    return retObj;
                }
            });
    
            //创建代理对象
    
            StudentService serviceProxy = (StudentService) enhancer.create();
         //   System.out.println(proxyService);
    
            return serviceProxy;
        }
    }

  • 测试结果：由cglab 创建对象并实现成功
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