* 启动provider

dubbo-demo-api-provider

* 启动consumer

dubbo-demo-api-consumer

consumer设置generic

```java
    public static void main(String[] args) {
        ReferenceConfig<DemoService> reference = new ReferenceConfig<>();
        reference.setApplication(new ApplicationConfig("dubbo-demo-api-consumer"));
        reference.setRegistry(new RegistryConfig("zookeeper://127.0.0.1:2181"));
        reference.setInterface(DemoService.class);
        reference.setGeneric(true);
        
        Object obj = reference.get();
        for(Class c : obj.getClass().getInterfaces()) {
            System.err.println(c);
        }
        DemoService service = reference.get();
        String message = service.sayHello("dubbo");
        System.out.println(message);
    }
```

客户端会报错：

```
Exception in thread "main" java.lang.ClassCastException: org.apache.dubbo.common.bytecode.proxy0 cannot be cast to org.apache.dubbo.demo.DemoService
	at org.apache.dubbo.demo.consumer.Application.main(Application.java:42)
```
import org.apache.dubbo.common.beanutil.JavaBeanAccessor;
import org.apache.dubbo.common.beanutil.JavaBeanDescriptor;
import org.apache.dubbo.common.beanutil.JavaBeanSerializeUtil;
import org.apache.dubbo.common.constants.CommonConstants;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.PojoUtils;
import org.apache.dubbo.common.utils.ReflectUtils;
import org.apache.dubbo.rpc.Filter;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Result;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.RpcInvocation;
import org.apache.dubbo.rpc.service.GenericException;
import org.apache.dubbo.rpc.support.ProtocolUtils;
import org.apache.dubbo.rpc.support.RpcUtils;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import static org.apache.dubbo.common.constants.CommonConstants.$INVOKE;
import static org.apache.dubbo.common.constants.CommonConstants.$INVOKE_ASYNC;
import static org.apache.dubbo.common.constants.CommonConstants.DUBBO_INVOCATION_PREFIX;
import static org.apache.dubbo.rpc.Constants.GENERIC_KEY;
/**
 * GenericImplInvokerFilter
 */
@Activate(group = CommonConstants.CONSUMER, value = GENERIC_KEY, order = 20000)