服务注册

1.添加Spring Cloud Zookeeper依赖:

<dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId> <exclusions> <exclusion> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.6.2</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency></dependencies>

2.在服务配置文件中添加zookeeper配置:

spring: cloud: zookeeper: connect-string: localhost:2181 #zookeeper地址

3.启动zookeeper服务器和服务（我这边是启动了两个服务，分别是provider和consumer），然后在zookeeper客户端中可以查看已经注册到zookeeper中的服务:

服务发现

1.创建controller

消费者controller:

package com.buhe.zk.controller;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.cloud.client.ServiceInstance;import org.springframework.cloud.client.discovery.DiscoveryClient;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.client.RestTemplate;import java.util.List;@RestControllerpublic class ZkConsumerController { private static final String SERVICE_NAME = "provider"; private static final String SERVICE_PATH = "/zk/provider"; @Autowired private RestTemplate restTemplate; @Autowired private DiscoveryClient discoveryClient; /** * 调用提供者服务 * @return */ @GetMapping("/zk/consumer") public String zkConsumer(){ return "我吃了" + restTemplate.getForObject("http://" + SERVICE_NAME + SERVICE_PATH, String.class); } /** * 获取提供者服务URL * @return */ @GetMapping("/zk/url") public String serviceUrl() { List<ServiceInstance> list = discoveryClient.getInstances(SERVICE_NAME); if (list != null && list.size() > 0 ) { return list.get(0).getUri().toString() + SERVICE_PATH; } return null; }}

要使用RestTemplate别忘了加配置：

@Bean@LoadBalancedpublic RestTemplate restTemplate(){ return new RestTemplate();}

提供者controller:

package com.buhe.zk.controller;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class ZkProviderController { @GetMapping("/zk/provider") public String zkProvider(){ return "10个苹果"; }}

2.服务调用

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