class Person{}; public class ClassLoaderDemo{ public static void main(String args[]){ Person stu = new Person() ; System.out.println("类加载器:" + stu.getClass().getClassLoader().getClass().getName()) ; } };
import java.lang.reflect.InvocationHandler ; import java.lang.reflect.Proxy ; import java.lang.reflect.Method ; interface Subject{ public String say(String name,int age) ; // 定义抽象方法say } class RealSubject implements Subject{ // 实现接口 public String say(String name,int age){ return "姓名:" + name + ",年龄:" + age ; } }; class MyInvocationHandler implements InvocationHandler{ private Object obj ; public Object bind(Object obj){ this.obj = obj ; // 真实主题类 return Proxy.newProxyInstance(obj.getClass().getClassLoader(),obj.getClass().getInterfaces(),this) ; } public Object invoke(Object proxy,Method method,Object[] args) throws Throwable{ Object temp = method.invoke(this.obj,args) ; // 调用方法 return temp ; } }; public class DynaProxyDemo{ public static void main(String args[]){ Subject sub = (Subject)new MyInvocationHandler().bind(new RealSubject()) ; String info = sub.say("李兴华",30) ; System.out.println(info) ; } };