使用gradle 做为构建工具，创建一个基础组spring-cl

写上前面的话：

从maven进行切换到gradle确实需要一定的转化成本，但gradle的简洁性和可以使用编程脚本，确实威力强大。

项目情况：

github地址：https://github.com/johnyu666/spring-cloud-demo-gradle

项目结构：为一父四子，子工程各有不同的情况，本例较为极端，将全部的gradle的构建脚本全部放到了父工程。

1. 父工程的settings.gradle的内容如下：

rootProject.name = 'spring-cloud-demo-gradle'
include 'payment'
include 'order'
include 'commons'
include 'eureka-server'

2. 父工程的build.gradle内容如下：

/**
 * ==================================================
 * 在父工程中声明"构建插件的版本"，在子工程中可以不再声明版本
 * =================================================
 */
plugins {
    id 'java'
    //与org.springframework.boot:spring-boot-gradle-plugin:2.3.12.RELEASE 相对应，采用此版本的原因是它与spring-clound:HSR12相对应
    id 'org.springframework.boot' version '2.3.12.RELEASE'
    //与io.spring.dependency-management:io.spring.dependency-management.gradle.plugin:1.0.11.RELEASE 相对应
    id 'io.spring.dependency-management' version '1.0.11.RELEASE'
}

//父工程坐标（与子工程没有关系）
group 'org.example'
version '1.0-SNAPSHOT'


/**
 * =========================
 * 为所有的工程配置
 * ========================
 */
allprojects {
    apply plugin: 'java'
    /**
     * ============================================================
     * 此坐标将成为子工程的默认项，
     * 配合settings.gradle中的rootProject.name='xxx',将完成项目定位
     * ============================================================
     */
    group 'org.example'
    version '1.0-SNAPSHOT'
//    远程库的镜像
    repositories {
        mavenLocal()
        maven {url 'https://maven.aliyun.com/repository/central'}
        maven {url 'https://maven.aliyun.com/repository/public'}
        maven {url 'https://maven.aliyun.com/repository/google'}
        maven {url 'https://maven.aliyun.com/repository/gradle-plugin'}
        maven {url 'https://maven.aliyun.com/repository/spring'}
        maven {url 'https://maven.aliyun.com/repository/spring-plugin'}
        maven {url 'https://maven.aliyun.com/repository/apache-snapshots'}
        mavenCentral()
    }
}


/**
 * ==================================
 * 所有子工程的配置
 * ==================================
 */
subprojects {
    sourceCompatibility = 1.8
    targetCompatibility = 1.8
    //排除commons模块,其它的模块采用相同的配置
    if(it.name!="commons") {
        apply plugin: 'org.springframework.boot'
        apply plugin: 'io.spring.dependency-management'
        dependencies {
            implementation 'org.springframework.boot:spring-boot-starter-web'
            testImplementation 'org.springframework.boot:spring-boot-starter-test'
            //完成热布署
            runtimeOnly 'org.springframework.boot:spring-boot-devtools'

        }
        //指定spring-cloud的版本，注意此版本与spring-boot 2.3.12.RELEASE 兼容
        dependencyManagement {
            imports {
                mavenBom "org.springframework.cloud:spring-cloud-dependencies:Hoxton.SR12"
            }
        }
        //演示如何向清单文件中添加信息
        jar {
            manifest.attributes provider: 'gradle'
        }
    }
}
project(":eureka-server"){
    dependencies {
        implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-server'
    }
}

project(":payment") {
    dependencies {
        implementation 'org.example:commons:1.0-SNAPSHOT'
        implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'
    }
}
project(":order"){
    dependencies {
        implementation 'org.example:commons:1.0-SNAPSHOT'
        implementation 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'
    }
}
/**
 * =========================================
 * 单独配置commons模块，此模块将安装到mavenLocal
 * 命令行：gradle publishToMavenLocal
 * ========================================
 */
project(':commons') {
    apply plugin: 'java-library'
    apply plugin: 'maven-publish'
    dependencies {
        annotationProcessor 'org.projectlombok:lombok:1.18.20'
        implementation 'org.projectlombok:lombok:1.18.20'
    }
    publishing {
        publications {
            maven(MavenPublication) {
                from components.java
            }
        }
    }
}