springcloud——服务提供者与消费者入驻到zookeeper注册中心，并且消费者调用提供者

一、服务提供者

1、控制器

package spring.cloud.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;

/**
 * @author dc
 * @date 2020/7/25 - 16:43
 */
@RestController
@Slf4j
public class PaymentController {


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

    @GetMapping("/payment/first")
    public String doFirst() {
        return "springcloud with zookeeper : " + serverPort + "\t" + UUID.randomUUID().toString();
    }
}

2、启动类

package spring.cloud;

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

import javax.activation.MailcapCommandMap;

/**
 * @author dc
 * @date 2020/7/25 - 16:37
 */
@SpringBootApplication
@EnableDiscoveryClient      //该注解用于向使用consul或者zookeeper作为注册中心时注册服务
public class Provider8084Main {


    public static void main(String[] args) {
        SpringApplication.run(Provider8084Main.class, args);
    }


}

3、配置文件

#指定主机的端口号
server.port=8084

#指定服务的名称
spring.application.name=payment-provider8084

#连接本机的zookeeper注册中心
spring.cloud.zookeeper.connect-string=127.168.1.16:2181

二、服务消费者

1、控制器

package com.springcloud.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author dc
 * @date 2020/7/26 - 9:29
 */

@RestController
@Slf4j
public class MyController {

    //声明调用服务的地址
    public static final String INVOKE_URL = "http://payment-provider8084";

    //从spring容器注入bean
    @Resource
    private RestTemplate restTemplate;

    @GetMapping("/consumer/zk")
    public String doFirst() {
        String result = restTemplate.getForObject(INVOKE_URL + "/payment/first", String.class);
        return result;

    }

}

2、配置类

package com.springcloud.config;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 * @author dc
 * @date 2020/7/26 - 9:25
 */
@Configuration      //指明该类为一个配置类
public class ApplicationContextConfig {

    @Bean       //注入到spring容器
    @LoadBalanced       //指明该实例可以负载均衡
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }


}

3、主配置类

#指定服务的端口号
server.port=81

#指定服务的名称
spring.application.name=payment-consumerzk81

#连接zookeeper注册中心
spring.cloud.zookeeper.connect-string=192.168.1.16:2181

4、启动类

package com.springcloud;

import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * @author dc
 * @date 2020/7/26 - 9:22
 */
@SpringBootApplication
@Slf4j
@EnableDiscoveryClient      //开启zookeeper注册中心服务发现
public class Consumerzk81Main {

    public static void main(String[] args) {
        SpringApplication.run(Consumerzk81Main.class, args);
    }

}