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作者：银河架构师

原文链接：https://www.cnblogs.com/luas/p/12073156.html

1 创建父项目

以前文所述，以spring boot 2.1.7.RELEASE为基，spring cloud版本为Greenwich.SR2，spring cloud alibaba版本为2.1.0.RELEASE。后续均以此为版本参照，不再赘述。

pom

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.1.7.RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

    <groupId>com.luas.cloud</groupId>

    <artifactId>java-boot-parent-2.1</artifactId>

    <version>1.0.0-SNAPSHOT</version>

    <packaging>pom</packaging>

    <name>java-boot-parent-2.1</name>

    <description>Spring Cloud Learning, parent project by spring boot 2.1.x</description>

    <properties>

        <java.version>1.8</java.version>

        <hutool.version>4.6.13</hutool.version>

        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>

        <spring-cloud-alibaba.version>2.1.0.RELEASE</spring-cloud-alibaba.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>cn.hutool</groupId>

            <artifactId>hutool-all</artifactId>

        </dependency>

    </dependencies>

    <dependencyManagement>

        <dependencies>

            <dependency>

                <groupId>cn.hutool</groupId>

                <artifactId>hutool-all</artifactId>

                <version>${hutool.version}</version>

            </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>${spring-cloud-alibaba.version}</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

        </dependencies>

    </dependencyManagement>

</project>

2 创建商品工程

pom

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <parent>

        <groupId>com.luas.cloud</groupId>

        <artifactId>java-boot-parent-2.1</artifactId>

        <version>1.0.0-SNAPSHOT</version>

        <relativePath>../../java-boot-parent-2.1</relativePath>

    </parent>

    <groupId>com.luas.cloud</groupId>

    <artifactId>xmall-product</artifactId>

    <version>1.0.0-SNAPSHOT</version>

    <name>xmall-product</name>

    <description>Spring Cloud Learning,nacos-client</description>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <!-- nacos cloud -->

        <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-test</artifactId>

            <scope>test</scope>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

注意，父工程便是上一步创建的父项目，特别注意一下relativePath，不如特殊指定，需要将父工程deploy到maven私服，子工程才能正常引用。

application配置

server:

  port: 8080

spring:

  application:

    name: xmall-product

  cloud:

    nacos:

      discovery:

        server-addr: 127.0.0.1:8848

注意，spring.application.name将作为xmall-product服务在nacos注册后的服务名称，该服务名称非常重要，后续无论是通过feign调用，还是rest调用，均需要此名称。

商品服务

package com.luas.cloud.controller;

import cn.hutool.core.map.MapUtil;

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

import org.springframework.web.bind.annotation.RequestMapping;

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

@RestController

@RequestMapping("/sku")

public class SkuController {

    @RequestMapping("/{skuId}")

    public Object get(@PathVariable("skuId") String skuId) {

        return MapUtil.<String, Object>builder()

                .put("skuId", skuId)

                .put("name", "笔记本电脑")

                .put("price", 1199.00)

                .build();

    }

}

启动类

package com.luas.cloud;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class XmallProductApplication {

    public static void main(String[] args) {

        SpringApplication.run(XmallProductApplication.class, args);

    }

}

关于@EnableDiscoveryClient注解，此处并没有添加，而服务依然能正常注册到nacos。什么原因呢？看如下两段代码即可明了：