注意：動態代理 並不一定非得攔截目標方法  場景也可以是 懶得寫實現類和其邏輯 利用動態代理 動態實現 類似於通用工具類的模式，如xxl-job原始碼中的那樣，只是獲取物件 組織物件內容

package com.xxl.job.core.rpc.netcom;

import com.xxl.job.core.rpc.codec.RpcRequest;
import com.xxl.job.core.rpc.codec.RpcResponse;
import com.xxl.job.core.rpc.netcom.jetty.client.JettyClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.FactoryBean;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

/**
 * rpc proxy
 */
public class NetComClientProxy implements FactoryBean<Object> {
	private static final Logger logger = LoggerFactory.getLogger(NetComClientProxy.class);

	// ---------------------- config ----------------------
	private Class<?> iface;
	private String serverAddress;
	private String accessToken;
	private JettyClient client = new JettyClient();
	public NetComClientProxy(Class<?> iface, String serverAddress, String accessToken) {
		this.iface = iface;
		this.serverAddress = serverAddress;
		this.accessToken = accessToken;
	}

	@Override
	public Object getObject() throws Exception {
		return Proxy.newProxyInstance(Thread.currentThread()
				.getContextClassLoader(), new Class[] { iface },
				new InvocationHandler() {
					@Override
					public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {

						// filter method like "Object.toString()"
						if (Object.class.getName().equals(method.getDeclaringClass().getName())) {
							logger.error(">>>>>>>>>>> xxl-rpc proxy class-method not support [{}.{}]", method.getDeclaringClass().getName(), method.getName());
							throw new RuntimeException("xxl-rpc proxy class-method not support");
						}
						
						// request
						RpcRequest request = new RpcRequest();
	                    request.setServerAddress(serverAddress);
	                    request.setCreateMillisTime(System.currentTimeMillis());
	                    request.setAccessToken(accessToken);
	                    request.setClassName(method.getDeclaringClass().getName());
	                    request.setMethodName(method.getName());
	                    request.setParameterTypes(method.getParameterTypes());
	                    request.setParameters(args);

	                    // send
	                    RpcResponse response = client.send(request);
	                    
	                    // valid response
						if (response == null) {
							logger.error(">>>>>>>>>>> xxl-rpc netty response not found.");
							throw new Exception(">>>>>>>>>>> xxl-rpc netty response not found.");
						}
	                    if (response.isError()) {
	                        throw new RuntimeException(response.getError());
	                    } else {
	                        return response.getResult();
	                    }
	                   
					}
				});
	}
	@Override
	public Class<?> getObjectType() {
		return iface;
	}
	@Override
	public boolean isSingleton() {
		return false;
	}

}
 

簡單的copy其中的一段程式碼： 

package com.xxl.job.core.executor;

import com.xxl.job.core.biz.AdminBiz;
import com.xxl.job.core.biz.ExecutorBiz;
import com.xxl.job.core.biz.impl.ExecutorBizImpl;
import com.xxl.job.core.handler.IJobHandler;
import com.xxl.job.core.handler.annotation.JobHandler;
import com.xxl.job.core.log.XxlJobFileAppender;
import com.xxl.job.core.rpc.netcom.NetComClientProxy;
import com.xxl.job.core.rpc.netcom.NetComServerFactory;
import com.xxl.job.core.thread.JobLogFileCleanThread;
import com.xxl.job.core.thread.JobThread;
import com.xxl.job.core.util.NetUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Created by xuxueli on 2016/3/2 21:14.
 */
public class XxlJobExecutor implements ApplicationContextAware {
    private static final Logger logger = LoggerFactory.getLogger(XxlJobExecutor.class);

   
// ---------------------- admin-client ----------------------
    private static List<AdminBiz> adminBizList;

    private static void initAdminBizList(String adminAddresses, String accessToken) throws Exception {
        if (adminAddresses!=null && adminAddresses.trim().length()>0) {
            for (String address: adminAddresses.trim().split(",")) {
                if (address!=null && address.trim().length()>0) {
                    String addressUrl = address.concat(AdminBiz.MAPPING);
                    AdminBiz adminBiz = (AdminBiz) new NetComClientProxy(AdminBiz.class, addressUrl, accessToken).getObject();
                    if (adminBizList == null) {
                        adminBizList = new ArrayList<AdminBiz>();
                    }
                    adminBizList.add(adminBiz);
                }
            }
        }
    }
    public static List<AdminBiz> getAdminBizList(){
        return adminBizList;
    }
}