一、简介：
Dubbo主页地址 http://dubbo.io/
Dubbo百度百科：https://baike.baidu.com/item/Dubbo/18907815?fr=aladdin
二、Zookeeper安装
在Dubbo中 官方推荐用zookeeper作为注册中心，我们来安装下zookeeper；
zookeeper主页：http://zookeeper.apache.org/
zookeeper支持windows也支持linux，这里演示下windows下安装zookeeper；将下载包解压之后，双击运行zkServer.cmd，如果一闪而过，看下报错原因：
记事本编辑它，末尾输入:pause 即可看报错原因；
在conf目录下将zoo_sample.cfg复制一份zoo.cfg， 再次运行zkServer.cmd, 服务启动了：
....
....
2018-09-16 10:26:08,199 [myid:] - INFO [main:Environment@100] - Server environment:java.io.tmpdir=C:\Users\CY\AppData\L
ocal\Temp\
2018-09-16 10:26:08,199 [myid:] - INFO [main:Environment@100] - Server environment:java.compiler=<NA>
2018-09-16 10:26:08,201 [myid:] - INFO [main:Environment@100] - Server environment:os.name=Windows 10
2018-09-16 10:26:08,202 [myid:] - INFO [main:Environment@100] - Server environment:os.arch=amd64
2018-09-16 10:26:08,202 [myid:] - INFO [main:Environment@100] - Server environment:os.version=10.0
2018-09-16 10:26:08,204 [myid:] - INFO [main:Environment@100] - Server environment:user.name=CY
2018-09-16 10:26:08,205 [myid:] - INFO [main:Environment@100] - Server environment:user.home=C:\Users\CY
2018-09-16 10:26:08,205 [myid:] - INFO [main:Environment@100] - Server environment:user.dir=H:\01java相关软件\zookeeper
-3.4.11\bin
2018-09-16 10:26:08,212 [myid:] - INFO [main:ZooKeeperServer@825] - tickTime set to 2000
2018-09-16 10:26:08,212 [myid:] - INFO [main:ZooKeeperServer@834] - minSessionTimeout set to -1
2018-09-16 10:26:08,213 [myid:] - INFO [main:ZooKeeperServer@843] - maxSessionTimeout set to -1
2018-09-16 10:26:08,271 [myid:] - INFO [main:ServerCnxnFactory@117] - Using org.apache.zookeeper.server.NIOServerCnxnFa
ctory as server connection factory
2018-09-16 10:26:08,273 [myid:] - INFO [main:NIOServerCnxnFactory@89] - binding to port 0.0.0.0/0.0.0.0:2181
这里的2181是zookeeper的默认端口