java创建代理对象，java创建对象,package cn.o

java创建代理对象，java创建对象,package cn.o

package cn.outofmemory.snippets.core;import java.lang.reflect.InvocationHandler;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.lang.reflect.Proxy;public class CreateProxyObject {    public static void main(String[] args) {        // return an instance of a proxy class for the specified interfaces        // that dispatches method invocations to the specified invocation handler        MyInterface myintf = (MyInterface)Proxy.newProxyInstance(                MyInterface.class.getClassLoader(),                new Class[]{MyInterface.class},                new MyProxy(new MyInterfaceImpl())        );        // Invoke the method        myintf.method();    }    private static interface MyInterface {        void method();    }    private static class MyInterfaceImpl implements MyInterface {        public void method() {            System.out.println("Plain method is invoked");        }    }    private static class MyProxy implements InvocationHandler {        Object obj;        public MyProxy(Object o) {            obj = o;        }        public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {            Object result = null;            try {                System.out.println("Proxy Class is called before method invocation");                result = m.invoke(obj, args);            }            catch (InvocationTargetException e) {                System.out.println("Invocation Target Exception: " + e);            }            catch (Exception e) {                System.out.println("Invocation Target Exception: " + e);            }            finally {                System.out.println("Proxy Class is called after method invocation");            }            return result;        }    }}

输出：

Proxy Class is called before method invocationPlain method is invokedProxy Class is called after method invocation