JDK动态代理

接口类：

public interface HelloService {
    String sayHello(String name);
}

实现类：

public class HelloServiceImpl implements HelloService{
    @Override
    public String sayHello(String name) {
        return "你好，" + name;
    }
}

代理工具类:

import java.lang.reflect.Proxy;

/**
 * 动态代理工厂类，通过JDK动态代理创建代理对象
 */
public class ProxyFactory {
    public static <T> T getProxy(Class<?> implClass) {
        MyInvocationHandler invocationHandler = new MyInvocationHandler(implClass);
        return (T) Proxy.newProxyInstance(implClass.getClassLoader(), implClass.getInterfaces(), invocationHandler);
    }
}

处理器：

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.List;

public class MyInvocationHandler implements InvocationHandler {

    private Class<?> implClass;

    public MyInvocationHandler(Class<?> implClass) {
        this.implClass = implClass;
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

        Object result = method.invoke(implClass.newInstance(), args);
        return result;
    }
}

客户端：

public class Consumer {

    public static void main(String[] args) {
        System.out.println(" ===========[Consumer started!!]=============");

        HelloService helloService = ProxyFactory.getProxy(HelloServiceImpl.class);

        String result = helloService.sayHello("World");
        System.out.println("Consumer.result:" + result);
    }
}