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??专栏介绍

【微服务~Nacos】 目前主要更新微服务，一起学习一起进步。

??本期介绍

本期主要介绍微服务~Nacos

文章目录

搭建父项目

服务提供者Provider

搭建服务

创建服务

查看服务

注册异常

服务消费者Consumer

搭建服务

创建服务

查询服务

搭建父项目

• 项目名：nacos-parent-2.1

• 添加坐标

  org.springframework.cloud spring-cloud-build 2.3.5.RELEASE

  
      Hoxton.SR12
      2.2.7-SNAPSHOT
      3.4.0
      1.1.10
      2.7.0
      0.9.0
      2.9.7
  
  
  
  
      
          
          
              org.springframework.boot
              spring-boot-dependencies
              ${spring-boot.version}
              pom
              import
          
  
          
              org.springframework.cloud
              spring-cloud-dependencies
              ${spring.cloud.version}
              pom
              import
          
  
          
              com.alibaba.cloud
              spring-cloud-alibaba-dependencies
              2.2.7.RELEASE
              pom
              import
          
  
          
          
              com.baomidou
              mybatis-plus-boot-starter
              ${mybatis.plus.starter.version}
          
  
          
          
              com.alibaba
              druid-spring-boot-starter
              ${durid.starter.version}
          
  
          
          
              io.springfox
              springfox-swagger2
              ${swagger.version}
          
          
              io.springfox
              springfox-swagger-ui
              ${swagger.version}
          
      
  
  
  
      
          
              org.apache.maven.plugins
              maven-javadoc-plugin
              
                  true
              
          
      
  
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• 项目目录结构

服务提供者Provider

搭建服务

• 创建项目：nacos-provider-2.1

• 添加依赖：

  org.springframework.boot spring-boot-starter-web

      
      
          com.alibaba.cloud
          spring-cloud-starter-alibaba-nacos-discovery
      
  
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• 创建yml文件

  #server.port=8070
  #spring.application.name=service-provider
  #spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
  #端口号
  server:
  port: 8070

  spring:
  application:
  name: service-provider #服务名
  cloud:
  nacos:
  discovery:
  server-addr: 127.0.0.1:8848 #nacos服务地址

创建服务

• 启动类

package com.czxy.nacos;

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


@SpringBootApplication
@EnableDiscoveryClient      //服务发现
public class TestNacosProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(TestNacosProviderApplication.class, args );
    }
}
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• 处理类controller

package com.czxy.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;


@RestController
public class EchoController {

    @Resource
    private HttpServletRequest request;

    @GetMapping("/echo/{string}")
    public String echo(@PathVariable String string) {
        int serverPort = request.getServerPort();
        return "Hello Nacos Discovery " + string + ":" + serverPort;
    }
}
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查看服务

• 通过浏览器访问

http://localhost:8070/echo/abc

• 通过Nacos控制台查看

注册异常

服务消费者Consumer

搭建服务

• 项目名：nacos-consumer-2.1

• 添加依赖

  org.springframework.boot spring-boot-starter-web

      
      
          com.alibaba.cloud
          spring-cloud-starter-alibaba-nacos-discovery
      
  
      
      
          org.springframework.cloud
          spring-cloud-starter-openfeign
      
  
  
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• 创建配置文件

#server.port=8071
#spring.application.name=service-consumer
#spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
#端口号
server:
  port: 8071

spring:
  application:
    name: service-consumer          #服务名
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848   #nacos服务地址
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创建服务

• 创建启动类

package com.czxy;

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


@SpringBootApplication
@EnableDiscoveryClient  //服务发现
public class TestNacosConsumerApplication {
    public static void main(String[] args) {
        SpringApplication.run(TestNacosConsumerApplication.class, args );
    }
}
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• 远程调用配置类

package com.czxy.config;

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


@Component
public class RestTemplateConfig {
    @LoadBalanced   //负载均衡
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
}
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• 处理类

  package com.czxy.nacos.controller;

  import org.springframework.web.bind.annotation.PathVariable;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RestController;
  import org.springframework.web.client.RestTemplate;

  import javax.annotation.Resource;

  @RestController
  public class TestRestController {
  @Resource
  private RestTemplate restTemplate;

  @RequestMapping(value = "/echo/{str}", method = RequestMethod.GET)
  public String echo(@PathVariable String str) {
      return restTemplate.getForObject("http://service-provider/echo/" + str, String.class);
  }
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  }

查询服务

• 通过浏览器访问

http://localhost:8071/echo/abc

通过Nacos控制台查看