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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

  <properties>
      <spring.cloud.version>Hoxton.SR12</spring.cloud.version>
      <spring.cloud.alibaba.version>2.2.7-SNAPSHOT</spring.cloud.alibaba.version>
      <mybatis.plus.starter.version>3.4.0</mybatis.plus.starter.version>
      <durid.starter.version>1.1.10</durid.starter.version>
      <swagger.version>2.7.0</swagger.version>
      <jwt.jjwt.version>0.9.0</jwt.jjwt.version>
      <jwt.joda.version>2.9.7</jwt.joda.version>
  </properties>
  
  
  <dependencyManagement>
      <dependencies>
          <!-- Spring Dependencies -->
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-dependencies</artifactId>
              <version>${spring-boot.version}</version>
              <type>pom</type>
              <scope>import</scope>
          </dependency>
  
          <dependency>
              <groupId>org.springframework.cloud</groupId>
              <artifactId>spring-cloud-dependencies</artifactId>
              <version>${spring.cloud.version}</version>
              <type>pom</type>
              <scope>import</scope>
          </dependency>
  
          <dependency>
              <groupId>com.alibaba.cloud</groupId>
              <artifactId>spring-cloud-alibaba-dependencies</artifactId>
              <version>2.2.7.RELEASE</version>
              <type>pom</type>
              <scope>import</scope>
          </dependency>
  
          <!-- mybatis-plus -->
          <dependency>
              <groupId>com.baomidou</groupId>
              <artifactId>mybatis-plus-boot-starter</artifactId>
              <version>${mybatis.plus.starter.version}</version>
          </dependency>
  
          <!-- Druid连接池 -->
          <dependency>
              <groupId>com.alibaba</groupId>
              <artifactId>druid-spring-boot-starter</artifactId>
              <version>${durid.starter.version}</version>
          </dependency>
  
          <!--swagger2-->
          <dependency>
              <groupId>io.springfox</groupId>
              <artifactId>springfox-swagger2</artifactId>
              <version>${swagger.version}</version>
          </dependency>
          <dependency>
              <groupId>io.springfox</groupId>
              <artifactId>springfox-swagger-ui</artifactId>
              <version>${swagger.version}</version>
          </dependency>
      </dependencies>
  </dependencyManagement>
  
  <build>
      <plugins>
          <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-javadoc-plugin</artifactId>
              <configuration>
                  <skip>true</skip>
              </configuration>
          </plugin>
      </plugins>
  </build>
  

• 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

      <!-- nacos 服务发现 -->
      <dependency>
          <groupId>com.alibaba.cloud</groupId>
          <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
      </dependency>
  </dependencies>
  

• 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 );
    }
}

• 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;
    }
}

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

      <!-- nacos 服务发现 -->
      <dependency>
          <groupId>com.alibaba.cloud</groupId>
          <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
      </dependency>
  
      <!-- openfeign 远程调用 -->
      <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-openfeign</artifactId>
      </dependency>
  
  </dependencies>
  

• 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

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 );
    }
}

• 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();
    }
}

• 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);
  }
  

  }

查询服务

• 通过浏览器访问

http://localhost:8071/echo/abc

通过Nacos控制台查看

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