008springCloud註冊中心之zookeeper

1. 下載 zookeeper

2. 進入apache-zookeeper-3.5.5-bin\apache-zookeeper-3.5.5-bin\bin\zkServer.cmd

啓動zookeeper

3.ZooInspector\build  啓動

java -jar zookeeper-dev-ZooInspector.jar

以上3步驟完成後，註冊中心服務端已經ok

4. java服務註冊到註冊中心

4.1 啓動類

package com.springcloud.zookeeper.server;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class ServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ServerApplication.class, args);
    }
}

4.2 配置類

server.port=8000
# 註冊到zookeeper的服務名
spring.application.name=zk-server
#zookeeper的地址和port
spring.cloud.zookeeper.connect-string=127.0.0.1:2181

4.3 提供的服務

package com.springcloud.zookeeper.server;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ServerController {

    @Value("${server.port}")
    private String serverPort;

    @RequestMapping("/getServer")
    public String getServerPort(){
        return "zookeeper 服務端，端口號：" +serverPort;
    }
}

4.4 依賴

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.springcloud.zookeeper</groupId>
    <artifactId>server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

5. 服務客戶端

5.1 啓動類

package com.springcloud.zookeeper.client;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@SpringBootApplication
@EnableDiscoveryClient
public class ClientApplication {

    public static void main(String[] args) {
        SpringApplication.run(ClientApplication.class, args);
    }

}

5.2 配置類

server.port=8001
spring.application.name=zk-client
spring.cloud.zookeeper.connect-string=127.0.0.1:2181

5.3 調用服務類

package com.springcloud.zookeeper.client;

import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.util.List;

@RestController
public class ClientController {

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private DiscoveryClient discoveryClient;

    @RequestMapping("/getServer")
    public String getSever(){
        String serverUrl = "http://zk-server/getServer";
        return  restTemplate.getForObject(serverUrl,String.class);
    }

    @RequestMapping("/discoveryClients")
    public List<ServiceInstance> discoveryClients(){
        List<ServiceInstance> instances = discoveryClient.getInstances("zk-server");
        for(ServiceInstance serviceInstance : instances){
            System.out.println("url:" + serviceInstance.getUri());
        }
        return instances;
    }

    @Bean
    @LoadBalanced
    public  RestTemplate restTemplate(){
        return new RestTemplate();
    }

}

依賴與服務一樣