Spring Cloud入门系列（十八）- Spring Cloud Alibaba之服务注册与配置中心Nacos

新建模块 cloud-alibaba-provider-payment9001（服务提供者）

pox.xml

添加 spring-cloud-starter-alibaba-nacos-discovery

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud201230</artifactId>
        <groupId>com.banana</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-alibaba-provider-payment9001</artifactId>

    <dependencies>
        <!--  SpringCloud alibaba nacos    -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>
</project>

application.yml

server:
  port: 9001
spring:
  application:
    name: nacos-payment-provider
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848 #配置nacos地址
management:
  endpoints:
    web:
      exposure:
        include: "*"

AlibabaProvider9001 主启动类

添加 @EnableDiscoveryClient 注解

package com.banana.springcloud;

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

/**
 * @author layman
 * @date 2021/1/21
 */
@SpringBootApplication
@EnableDiscoveryClient
public class AlibabaProvider9001 {
    
    
    public static void main(String[] args) {
    
    
            SpringApplication.run(AlibabaProvider9001.class,args);
        }
}

AlibabaProviderController .java

package com.banana.springcloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author layman
 * @date 2021/1/21
 */
@RestController
public class AlibabaProviderController {
    
    

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

    @GetMapping(value = "/payment/nacos/{id}")
    public String getPayment(@PathVariable("id") Integer id) {
    
    
        return "nacos registry, serverPort: " + serverPort + "  id:" + id;
    }
}

将以上的 cloud-alibaba-provider-payment9001 复制一份，端口设置为 9002

nacos实现了负载均衡，因为它 本身集成了ribbon

新建模块 cloud-alibaba-consumer-nacos-order83（服务消费者）

pom.xml

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud201230</artifactId>
        <groupId>com.banana</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-alibaba-consumer-nacos-order83</artifactId>

    <dependencies>
        <!--  SpringCloud alibaba nacos    -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!--引入自定义的api通用包-->
        <dependency>
            <groupId>com.banana</groupId>
            <artifactId>cloud-api-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>
</project>

application.yml

server:
  port: 83
spring:
  application:
    name: nacos-order-consumer
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848

# 消费者将要去访问微服务名称(注册成功进nacos的微服务提供者)
service-url:
  nacos-user-service: http://nacos-payment-provider

ConsumerNacosOrder83

package com.banana.springcloud;

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

/**
 * Nacos消费端
 * @author layman
 * @date 2021/1/22
 */
@SpringBootApplication
@EnableDiscoveryClient
public class ConsumerNacosOrder83 {
    
    
    public static void main(String[] args) {
    
    
            SpringApplication.run(ConsumerNacosOrder83.class,args);
        }
}

ConsumerNacosOrderController

package com.banana.springcloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author layman
 * @date 2021/1/22
 */
@RestController
public class ConsumerNacosOrderController {
    
    
    @Resource
    private RestTemplate restTemplate;

    @Value("${service-url.nacos-user-service}")
    private String serverURL;

    @GetMapping("/consumer/payment/nacos/{id}")
    public String paymentInfo(@PathVariable("id") Long id) {
    
    
        return restTemplate.getForObject(serverURL + "/payment/nacos/" + id, String.class);
    }
}

ConsumerNacosOrderController

package com.banana.springcloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author layman
 * @date 2021/1/22
 */
@RestController
public class ConsumerNacosOrderController {
    
    
    @Resource
    private RestTemplate restTemplate;

    @Value("${service-url.nacos-user-service}")
    private String serverURL;

    @GetMapping("/consumer/payment/nacos/{id}")
    public String paymentInfo(@PathVariable("id") Long id) {
    
    
        return restTemplate.getForObject(serverURL + "/payment/nacos/" + id, String.class);
    }
}

ApplicationContextConfig

package com.banana.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 layman
 * @date 2021/1/22
 */
@Configuration
public class ApplicationContextConfig {
    
    
    @Bean
    @LoadBalanced
    public RestTemplate getRestTemplate() {
    
    
        return new RestTemplate();
    }
}