AOP 那些事（二）

下面介紹一下CGLib代理

package cglib;
import org.springframework.cglib.proxy.Enhancer;
import org.springframework.cglib.proxy.MethodInterceptor;
import org.springframework.cglib.proxy.MethodProxy;
import java.lang.reflect.Method;
/**
 * Created by dingshuangkun on 2018/1/8.
 */
public class CGLibProxy implements 
 {

    public <T> T getProxy(Class<?> cls){

        return (T)Enhancer.create(cls,this);
    }

    @Override
    public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable {
         before();
         Object obj = methodProxy.invokeSuper(o,objects);
         after();
        return obj;
    }

    public void before(){
        System.out.println("----before----");
    }

    public void after(){
        System.out.println("----after-----");
    }

}

實現CGLib代理也比較簡單,實現MethodInterceptor接口便可

 

@Test
public void cglibTest(){
    CGLibProxy cgLibProxy = new CGLibProxy();
    GreetingImpl greetingProxy= cgLibProxy.getProxy(GreetingImpl.class);
    greetingProxy.sayHello("ding");
    greetingProxy.sayNiHao("ding");

}

運行結果

----before----
hello ding
----after-----
----before----
niHao ding
----after-----