Java 代理，InvocationHandler，Proxy
public class Test {
??? public static void main(String[] args) {
??? ??? // TODO Auto-generated method stub
??? ??? Test t=new Test();
? ? ?? ? t.inter();
??? }
?? void inter(){
??? ??? ServiceProxy proxy = new ServiceProxy();
??? ??? ServiceImpl service = new ServiceImpl();
??? ??? proxy.setService(service);
??? ??? Object service2 = Proxy.newProxyInstance(ServiceImpl.class.getClassLoader(), new Class[]{Service.class}, proxy);
??? ??? System.out.println(service2.getClass());
??? ??? Service s = (Service)service2;???????????? //只能转换为接口
??? }
}
?
interface Service{
??? String prt();
}
class ServiceImpl implements Service{
??? public String prt(){
??? ??? System.out.println(" Interface Impl");
??? ??? return "InterFaceImpl";
??? }
}
class ServiceProxy implements InvocationHandler{
??? Object service;
???
??? void setService(Object service){
??? ??? this.service=service;
??? }
??? public Object invoke(Object proxy, Method method, Object[] args)
??? ??? ??? throws Throwable {
??? ??? Object o=null;
??? ??? o=method.invoke(service, args);
??? ??? return o;
??? }
}