Dubbo隐式传参

dubbo通过客户端向服务器端传递参数，传递参数时path,group,version,dubbo,token,timeout即可key有特殊处理，不能使用这几个特殊key
服务提供方使用RpcContext.getContext()
.getAttachments();获取参数，
服务器消费方使用
RpcContext.getContext().setAttachment(); 传递参数。
一下是测试代码：

package com.yncp.dubbo.service;public interface IDubboParmService {         public String print();  }

package com.yncp.dubbo.service.impl;import java.util.Map;import com.alibaba.dubbo.rpc.RpcContext;import com.yncp.dubbo.service.IDubboParmService;public class DubboParmServiceImpl implements IDubboParmService {    public String print() {        Map<String, String> attachments = RpcContext.getContext()                .getAttachments();        String parm = attachments.get("parm");        System.out.println("parm：" + parm);        return "嗨";    }}

消费方测试：

import java.io.IOException;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.alibaba.dubbo.rpc.RpcContext;import com.yncp.dubbo.service.IDubboParmService;public class DubboStart {    public static void main(String[] args) throws IOException {        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");        //RpcContext.getContext().setAttachment("parm", "嘿嘿");        IDubboParmService dubboParmService=(IDubboParmService) ctx.getBean("dubboParmService");        // setAttachment设置的KV，在完成下面一次远程调用会被清空。即多次远程调用要多次设置。        for(int i=0;i<5;i++){             RpcContext.getContext().setAttachment("parm", "嘿嘿"+i);            dubboParmService.print();        }    }}