cglib动态代理（需导入cglib-nodep-2.1_3.jar）

public interface AnimalInterface {
    public void cry();
}

public class AnimalImpl implements AnimalInterface {

    public void cry() {
        // TODO Auto-generated method stub
        System.out.println("crying");
    }

}

public class MyCglib implements MethodInterceptor {
    private Object proxied;

    private MyCglib(Object proxied) {
        this.proxied = proxied;
    }

    public static Object getProxy(Object proxied) {
        MyCglib cglib = new MyCglib(proxied);
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(proxied.getClass());
        enhancer.setCallback(cglib);
        return enhancer.create();
    }

    public Object intercept(Object obj, Method method, Object[] args,
            MethodProxy proxy) throws Throwable {
        Object ret;
        System.out.println("Before Method Invoke");
        ret = method.invoke(proxied, args);
        System.out.println("After Method Invoke");
        return ret;

    }

}

public class Test {
    public static void main(String[] args) {
        AnimalImpl animal = (AnimalImpl) MyCglib.getProxy(new AnimalImpl());
        animal.cry();
    }
}