02.Nacos安装与应用

一、服务端安装

1.github上面搜索nacos


2.根据spring cloud alibaba组件版本关系,选择nacos版本下载




3.解压nacos,修改mode默认是集群修改为独立模式


4.配置文件位置,默认是内存方式保存,可以修改为数据库方式,也可以修改端口等。


5.运行,有地址信息,模式信息,信息保存位置信息



6.访问,默认用户名密码都是nacos



二、客户端配置

1.引入依赖

<?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>Spring-Cloud-Lry</artifactId>
        <groupId>cn.luoruiyuan</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>stock</artifactId>



    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

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

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

    </dependencies>

</project>

2.配置文件修改

server:
  port: 8890

spring:
  application:
    #应用名称,也是nacos服务名称
    name: order-service
  cloud:
    nacos:
      discovery:
        #登录用户名
        username: nacos
        #登录密码
        password: nacos
        #命名空间,根据环境进行设定(dev,uat,pro)
        namespace: public
      #服务器地址
      server-addr: 127.0.0.1:8848

3.配置类

import org.springframework.boot.web.client.RestTemplateBuilder;
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 LRY
 * @date 2022/7/3
 */
@Configuration
public class SpringCloudConfig {

    @Bean
    //nacos服务名称调用
    @LoadBalanced
    public RestTemplate restTemplate(RestTemplateBuilder builder){
        RestTemplate build = builder.build();
        return build;
    }

}

4.订单服务调用库存服务

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @author LRY
 * @date 2022/7/2
 */
@RestController
public class OrderController {

    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/order")
    public String queryOrder(){
        ResponseEntity<String> entity = restTemplate.getForEntity("http://stock-service/stock", String.class);
        return "下单成功-----"+ entity.getBody().toString();
    }
}

5.库存服务

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

/**
 * @author LRY
 * @date 2022/7/2
 */
@RestController
public class StockController {

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

    @GetMapping("/stock")
    public String queryOrder(){
        return "减库存库存:"+port;
    }

}

6.调用结果



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