文章目录




前言

上篇文章 ​​Spring Cloud Alibaba学习笔记: 3、Nacos - 服务注册与发现​​​ 中，我们创建了实现了通过 Nacos 的服务提供者与发现者，也通过使用 ​​LoadBalancerClient​​ 来获取某个服务实例，并消费服务接口，但是异常繁琐，不是很友好，本片文正是对上文 服务消费者有优化实现， 絮絮叨叨了半天，接下来开启新的探索吧…

创建 Nacos RestTemplate 消费者

1、 创建一个maven module 项目 ​​sca-nacos-discovery-consumer-resttemplate​​

2、 pom.xml 配置

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http:///POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http:///POM/4.0.0 http:///xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>sca</artifactId>
        <groupId>cn.fxbin.learn</groupId>
        <version>1.0</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>sca-nacos-discovery-consumer-resttemplate</artifactId>
    <version>1.0</version>
    <name>sca-nacos-discovery-consumer-resttemplate</name>
    <description>Spring Cloud Alibaba Nacos Discovery Consumer RestTemplate Service Project</description>

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

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

    </dependencies>

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

</project>

3、创建应用主类别 ​​ScaNacosConsumerApplication​​ 

package cn.fxbin.learn.sca.nacos.consumer;

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


@EnableDiscoveryClient
@SpringBootApplication
public class ScaNacosConsumerApplication {

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

4、创建 ​​RestTemplateConfig​​ 

package cn.fxbin.learn.sca.nacos.consumer.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;

/**
 * RestTemplateConfig
 *
 * @author fxbin
 * @version v1.0
 * @since 2019/7/7 20:37
 */
@Configuration
public class RestTemplateConfig {

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

}

5、创建 ​​ConsumerController​​ 

package cn.fxbin.learn.sca.nacos.consumer.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;

/**
 * ConsumerController
 *
 * @author fxbin
 * @version v1.0
 * @since 2019/7/7 20:36
 */
@Slf4j
@RestController
public class ConsumerController {

    @Resource
    private RestTemplate restTemplate;

    @GetMapping(value = "/test")
    public String test() {

        String url = String.format("http://%s/echo/%s", "sca-nacos-discovery-provider", " !^@^! ");
        log.info("请求路径为：{}", url);
        return restTemplate.getForObject(url, String.class);
    }

}

6、配置服务端口、名称、服务端点检查和Nacos地址

server:
  port: 9032

management:
  endpoints:
    web:
      exposure:
        include: "*"

spring:
  application:
    name: sca-nacos-discovery-consumer-resttemplate
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

7、启动服务消费者

Spring Cloud Alibaba学习笔记:4、创建服务消费者（RestTemplate + LoadBalancerClient）_maven

8、检查nacos 控制台

Spring Cloud Alibaba学习笔记:4、创建服务消费者（RestTemplate + LoadBalancerClient）_服务端_02

9、测试消费者

> 服务端点检查

访问 http://127.0.0.1:9032/actuator/nacos-discovery

Spring Cloud Alibaba学习笔记:4、创建服务消费者（RestTemplate + LoadBalancerClient）_服务端_03

> 测试服务消费API

访问 http://localhost:9032/test

Spring Cloud Alibaba学习笔记:4、创建服务消费者（RestTemplate + LoadBalancerClient）_spring_04

Spring Cloud Alibaba学习笔记:4、创建服务消费者（RestTemplate + LoadBalancerClient）_spring_05

源码地址：

github地址: https:///fxbin/sca

码云地址 : https://gitee.com/fxbin/sca

– ​​end​​ –

​​如有问题，请留言或发送邮件联系，感谢阅读​​