SpringCloud2020 (代码完结，脑图见下方链接)

<!--引入自己定义的api调用包，可以使用Payment支付Entity-->
<dependency>
    <groupId>com.springcloud</groupId>
    <artifactId>cloud-api-commons</artifactId>
    <version>${project.version}</version>
</dependency>

@Resource
private DiscoveryClient discoveryClient;

@GetMapping(value = "/payment/discovery")
public Object discovery() {
    //查询Eureka上面注册了几个服务
    List<String> services =  discoveryClient.getServices();
    for (String service : services) {
        log.info("service:"+service);
    }

    //查询对应名字下面有几个示例
    List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
    for (ServiceInstance instance : instances) {
        log.info(instance.getServiceId()+"\t"+instance.getHost()
            +"\t"+instance.getPort()+"\t"+instance.getUri());
    }
    return this.discoveryClient;
}

<!-- SpringBoot整合zookeeper客户端 -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
    <!-- 先排除自带的zookeeper3.5.3 -->
    <exclusions>
        <exclusion>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<!-- 添加zookeeper3.4.11版本 -->
<dependency>
    <groupId>org.apache.zookeeper</groupId>
    <artifactId>zookeeper</artifactId>
    <version>3.4.11</version>
</dependency>