开发工具：IntelliJ IDEA 2019.2.4(Ultimate Edition)

搭建一个简单的服务

1.File > New > Module

File > New > Module

2.Spring Initializr > SDK版本 > NEXT

Spring Initializr > SDK版本 > NEXT

3.填写模块信息
Group 项目组织唯一标识符
Artifact 模块唯一标识符
Type 工程类型，选择Maven Project
Language 开发语言，选择Java
Packaging 包类型，选择Jar
Java Version Java版本
Version 模块版本
Name 模块名称
Description 模块描述
Package 模块包

模块信息

4.选择模块依赖
Web > 勾选Spring Web
Spring Cloud > 勾选Cloud Bootstrap > NEXT

选择模块依赖

5.填写模块名称及存放目录 > FINISH

填写模块名称及存放目录

6.删除.mvn目录、.gitignore HELP.md mvnw mvnw.cmd文件，oa-user-center.iml文件可移动到根目录的.idea目录

删除未用到的目录及文件

7.重命名oa-user-center/src/main/resources/目录下的application.properties文件为application.yml，并写入以下内容

spring:
  application:
    # 服务名称
    name: oa-user-center
server:
  # 服务HTTP端口号
  port: 8081

8.修改oa-user-center下的pom.xml文件的parent节点，引入父工程的spring boot依赖，并删除和parent节点同级的groupId节点

<?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>
    <!-- 引入父工程的spring boot依赖 -->
    <parent>
        <groupId>cn.libaiii</groupId>
        <artifactId>oa-cloud</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <artifactId>oa-user-center</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>oa-user-center</name>
    <description>User Center</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
    </properties>

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

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

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

</project>

9.在父工程的pom.xml文件中添加modules节点，并在下级添加用户中心模块

<?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">
    <modelVersion>4.0.0</modelVersion>

    <!--  父依赖  -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>cn.libaiii</groupId>
    <artifactId>oa-cloud</artifactId>
    <version>1.0-SNAPSHOT</version>

    <modules>
        <!-- 用户中心模块 -->
        <module>oa-user-center</module>
    </modules>
</project>

10.新建UserController类，包路径cn.libaiii.user.center.rest

package cn.libaiii.user.center.rest;

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

/**
 * 用户中心
 *
 * @author libai
 * @version 1.0
 * @date 2020/1/14
 */
@RestController
@RequestMapping("user")
public class UserController {

    @RequestMapping(value = "/get", method = RequestMethod.GET)
    public String get() {
        return "hello world";
    }
}

11.运行oa-user-center服务，点击右上角Run按钮

运行oa-user-center服务

控制台中输出 Started UserCenterApplication in xxx seconds，代表服务启动成功

启动成功标示

访问http://localhost:8081/user/get，响应 hello world

至此，一个简单的服务搭建完成