springcloud_day03_07.第七节-Zookeeper整合Ribbon负载均衡-优快云博客

本文详细介绍了一个基于Spring Boot和Spring Cloud的微服务架构实践案例，包括服务注册与发现、负载均衡、远程调用等关键技术实现。通过具体代码示例，展示了如何配置Zookeeper作为服务注册中心，以及如何使用RestTemplate进行服务间RPC调用。

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项目结构

两个服务的依赖是一样的

<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.1.RELEASE</version>
	</parent>
	<!-- 管理依赖 -->
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Finchley.M7</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<!-- SpringBoot整合Web组件 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<!-- SpringBoot整合eureka客户端 -->
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
		</dependency>

	</dependencies>
	<!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
	<repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/libs-milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

###订单服务的端口号
server:
port: 8003
###服务别名----服务注册到注册中心名称
spring:
application:
name: zk-member
cloud:
zookeeper:
connect-string: 127.0.0.1:2181

package com.itmayiedu;

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

@SpringBootApplication
@EnableDiscoveryClient
public class AppMember {

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

   // @EnableDiscoveryClient 的作用是：如果服务使用 connsul zookeeper 话
   // 使用@EnableDiscoveryClient注解将服务注册到注册中心

}

=============================================

###订单服务的端口号
server:
port: 8004
###服务别名----服务注册到注册中心名称
spring:
application:
name: zk-order
cloud:
zookeeper:
connect-string: 127.0.0.1:2181

package com.itmayiedu;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

@SpringBootApplication
@EnableDiscoveryClient
public class AppOrder {

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

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

}

package com.itmayiedu;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
public class OrderController {
@Autowired
private RestTemplate restTemplate;

   @RequestMapping("/getorder")
   public String getOrder() {
       // order 使用rpc 远程调用技术调用会员服务
       String memberUrl = "http://zk-member/getMember";
       String result = restTemplate.getForObject(memberUrl, String.class);
       System.out.println("会员服务调用订单服务,result:" + result);
       return result;
   }

}