springboot聚合工程是什么意思

小编给大家分享一下SpringBoot聚合工程是什么意思，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

1.什么是聚合工程

如下图所示，拥有父子包结构的springboot工程叫做聚合工程。其中父包包括了多个子包（多个项目）。

2.聚合工程优势

1. 组件化管理通用功能，动态的添加功能。

2. 统一管理jar包的版本号

3. 提高复用性

3.创建聚合工程

首先创建一个springboot项目，然后删除src文件夹 。

创建子工程

选择Spring Boot项目，然后继续，创建项目。如果是工具，配置，组件化的项目（不需要启动）可以继续删除启动类和resources文件夹。

修改父工程和子工程pom文件。然后聚合工程就搭建好了，这里最重点是pom文件的配置和标签，下文就开始介绍。

4.父工程详解

ps:这里以若依开源项目为例，结构如下，我们主要讲解红框里面的配置，父工程为RuoYi-Cloud，包括ruoyi-auth，ruoyi-gateway，ruoyi-visual，ruoyi-api，ruoyi-common子项目。而ruoyi-modules子工程也包括多个子工程。

1.pom文件

<?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>    <groupId>com.ruoyi</groupId>    <artifactId>ruoyi</artifactId>    <version>2.5.0</version>    <name>ruoyi</name>    <url>http://www.ruoyi.vip</url>    <description>若依微服务系统</description>    <properties>        <ruoyi.version>2.5.0</ruoyi.version>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>        <java.version>1.8</java.version>        <spring-boot.version>2.3.7.RELEASE</spring-boot.version>        <spring-cloud.version>Hoxton.SR9</spring-cloud.version>        <spring-cloud-alibaba.version>2.2.5.RELEASE</spring-cloud-alibaba.version><spring-boot-admin.version>2.3.1</spring-boot-admin.version>        <spring-boot.mybatis>2.1.4</spring-boot.mybatis>        <swagger.fox.version>2.9.2</swagger.fox.version>        <swagger.core.version>1.5.24</swagger.core.version>        <tobato.version>1.26.5</tobato.version>        <kaptcha.version>2.3.2</kaptcha.version>        <pagehelper.boot.version>1.3.0</pagehelper.boot.version>        <druid.version>1.2.4</druid.version>        <dynamic-ds.version>3.2.1</dynamic-ds.version>        <commons.io.version>2.5</commons.io.version>        <commons.fileupload.version>1.3.3</commons.fileupload.version>        <velocity.version>1.7</velocity.version>        <fastJSON.version>1.2.75</fastjson.version>        <miNIO.version>8.0.3</minio.version><poi.version>4.1.2</poi.version>        <common-pool.version>2.6.2</common-pool.version>    </properties>    <!-- 依赖声明 -->    <dependencyManagement>        <dependencies>            <!-- SpringCloud 微服务 -->            <dependency>                <groupId>org.springframework.cloud</groupId>                <artifactId>spring-cloud-dependencies</artifactId>                <version>${spring-cloud.version}</version>                <type>pom</type>                <scope>import</scope>            </dependency><!-- SprinGCloud Alibaba 微服务 -->            <dependency>                <groupId>com.alibaba.cloud</groupId>                <artifactId>spring-cloud-alibaba-dependencies</artifactId>                <version>${spring-cloud-alibaba.version}</version>                <type>pom</type>                <scope>import</scope>            </dependency>            <!-- SpringBoot 依赖配置 -->            <dependency>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-dependencies</artifactId>                <version>${spring-boot.version}</version>                <type>pom</type>                <scope>import</scope>            </dependency>            <!--  SpringBoot 监控客户端 -->            <dependency>                <groupId>de.codecentric</groupId>                <artifactId>spring-boot-admin-starter-client</artifactId>                <version>${spring-boot-admin.version}</version>            </dependency>            <!-- FastDFS 分布式文件系统 -->            <dependency>                <groupId>com.GitHub.tobato</groupId>                <artifactId>fastdfs-client</artifactId>                <version>${tobato.version}</version>            </dependency>            <!-- Mybatis 依赖配置 -->            <dependency>                <groupId>org.mybatis.spring.boot</groupId>                <artifactId>mybatis-spring-boot-starter</artifactId>                <version>${spring-boot.mybatis}</version>            </dependency>            <!-- Swagger 依赖配置 -->            <dependency>                <groupId>io.swagger</groupId>                <artifactId>swagger-models</artifactId>                <version>${swagger.core.version}</version>            </dependency>            <dependency>                <groupId>io.swagger</groupId>                <artifactId>swagger-annotations</artifactId>                <version>${swagger.core.version}</version>            </dependency>            <!-- 验证码 -->            <dependency>                <groupId>com.github.penggle</groupId>                <artifactId>kaptcha</artifactId>                <version>${kaptcha.version}</version>            </dependency>            <!-- pagehelper 分页插件 -->            <dependency>                <groupId>com.github.pagehelper</groupId>                <artifactId>pagehelper-spring-boot-starter</artifactId>                <version>${pagehelper.boot.version}</version>            </dependency>            <!-- io常用工具类 -->            <dependency>                <groupId>commons-io</groupId>                <artifactId>commons-io</artifactId>                <version>${commons.io.version}</version>            </dependency>            <!-- excel工具 -->            <dependency>                <groupId>org.apache.poi</groupId>                <artifactId>poi-ooxml</artifactId>                <version>${poi.version}</version>            </dependency>            <!-- 文件上传工具类 -->            <dependency>                <groupId>commons-fileupload</groupId>                <artifactId>commons-fileupload</artifactId>                <version>${commons.fileupload.version}</version>            </dependency>            <!-- 代码生成使用模板 -->            <dependency>                <groupId>org.apache.velocity</groupId>                <artifactId>velocity</artifactId>                <version>${velocity.version}</version>                <exclusions>                    <exclusion>                        <groupId>commons-collections</groupId>                        <artifactId>commons-collections</artifactId>                    </exclusion>                </exclusions>            </dependency>            <!-- JSON 解析器和生成器 -->            <dependency>                <groupId>com.alibaba</groupId>                <artifactId>fastjson</artifactId>                <version>${fastjson.version}</version>            </dependency>                        <!-- 公共资源池 -->            <dependency>                <groupId>org.apache.commons</groupId>                <artifactId>commons-pool2</artifactId>                <version>${common-pool.version}</version>            </dependency>            <!-- 核心模块 -->        <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-common-core</artifactId>                <version>${ruoyi.version}</version>            </dependency>            <!-- 接口模块 -->            <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-common-swagger</artifactId>                <version>${ruoyi.version}</version>            </dependency>                    <!-- 安全模块 -->            <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-common-security</artifactId>                <version>${ruoyi.version}</version>            </dependency>                    <!-- 权限范围 -->            <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-common-datascope</artifactId>                <version>${ruoyi.version}</version>            </dependency>                        <!-- 多数据源 -->            <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-common-datasource</artifactId>                <version>${ruoyi.version}</version>            </dependency>            <!-- 日志记录 -->            <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-common-log</artifactId>                <version>${ruoyi.version}</version>            </dependency>            <!-- 缓存服务 -->            <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-common-redis</artifactId>                <version>${ruoyi.version}</version>            </dependency>            <!-- 系统接口 -->            <dependency>                <groupId>com.ruoyi</groupId>                <artifactId>ruoyi-api-system</artifactId>                <version>${ruoyi.version}</version>            </dependency>        </dependencies>    </dependencyManagement>    <modules><module>ruoyi-auth</module><module>ruoyi-gateway</module><module>ruoyi-visual</module><module>ruoyi-modules</module><module>ruoyi-api</module><module>ruoyi-common</module>    </modules>    <packaging>pom</packaging>    <dependencies>        <!-- swagger -->        <dependency>            <groupId>io.swagger</groupId>            <artifactId>swagger-annotations</artifactId>            <version>1.5.10</version>        </dependency>    </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <configuration>                    <source>${java.version}</source>                    <target>${java.version}</target>                    <encoding>${project.build.sourceEncoding}</encoding>                </configuration>            </plugin>        </plugins>    </build></project>

<name><url><description>都是非必须，字面意思。<groupId>：域 例如com<artifactId>：公司名  groupid和artifactId被统称为“坐标”是为了保证项目唯一性而提出的<version>：项目的版本号<properties>：属性的占位符 如java中的常量 <dependencyManagement>：在我们项目顶层的POM文件中，我们会看到dependencyManagement元素。通过它元素来管理jar包的版本，让子项目中引用一个依赖而不用显示的列出版本号。Maven会沿着父子层次向上走，直到找到一个拥有dependencyManagement元素的项目，然后它就会使用在这个dependencyManagement元素中指定的版本号。<dependencies>：指定所有的子工程都下载该包。

白话说 如果父工程有，且groupId和artifactId相同，那么子工程不需要指定版本号， 直接使用父工程版本号。

例如：当子工程有groupId为org.springframework.cloud时，引用当前父工程指定版本。子工程不用在写版本号了。

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

<modules>：指当前父工程包含的子工程 如果这里不引入 那么 刷新父工程pom时 子工程不会下载jar包
<build>：打包配置
<packaging>pom</packaging>在聚合工程中 一定要配置 指的是在引入其他工程时 直接引入代码，否则就会打成jar包 这样就会报错了

5.ruoyi-modules子工程配置

这里我们选择一个最有代表性的子工程ruoyi-modules来介绍。

1.pom文件

<?xml version="1.0" encoding="UTF-8"?><project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <parent>        <groupId>com.ruoyi</groupId>        <artifactId>ruoyi</artifactId>        <version>2.5.0</version>    </parent>    <modelVersion>4.0.0</modelVersion>    <modules>        <module>ruoyi-system</module>        <module>ruoyi-gen</module>        <module>ruoyi-job</module>        <module>ruoyi-file</module>    </modules>    <artifactId>ruoyi-modules</artifactId>    <packaging>pom</packaging>    <description>        ruoyi-modules业务模块    </description></project>

这里主要配置是

<parent>：内容就是父工程的<groupId><artifactId><version>
<modules>：指该工程包含ruoyi-system，ruoyi-gen，ruoyi-job，ruoyi-file子工程

ruoyi-system子项目配置

<?xml version="1.0" encoding="UTF-8"?><project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xmlns="http://maven.apache.org/POM/4.0.0"         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <parent>        <groupId>com.ruoyi</groupId>        <artifactId>ruoyi-modules</artifactId>        <version>2.5.0</version>    </parent>    <modelVersion>4.0.0</modelVersion>    <artifactId>ruoyi-modules-system</artifactId>    <description>        ruoyi-modules-system系统模块    </description>    <dependencies>        <!-- SpringCloud Alibaba Nacos -->        <dependency>            <groupId>com.alibaba.cloud</groupId>            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>        </dependency>                <!-- SpringCloud Alibaba Nacos Config -->        <dependency>            <groupId>com.alibaba.cloud</groupId>            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>        </dependency>            <!-- SpringCloud Alibaba Sentinel -->        <dependency>            <groupId>com.alibaba.cloud</groupId>            <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>        </dependency>            <!-- SpringBoot Actuator -->        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-actuator</artifactId>        </dependency>        <!-- Swagger UI -->        <dependency>            <groupId>io.springfox</groupId>            <artifactId>springfox-swagger-ui</artifactId>            <version>${swagger.fox.version}</version>        </dependency>        <!-- Mysql Connector -->        <dependency>            <groupId>Mysql</groupId>            <artifactId>mysql-connector-java</artifactId>        </dependency>                <!-- RuoYi Common DataSource -->        <dependency>            <groupId>com.ruoyi</groupId>            <artifactId>ruoyi-common-datasource</artifactId>        </dependency>                <!-- RuoYi Common DataScope -->        <dependency>            <groupId>com.ruoyi</groupId>            <artifactId>ruoyi-common-datascope</artifactId>        </dependency>                <!-- RuoYi Common Log -->        <dependency>            <groupId>com.ruoyi</groupId>            <artifactId>ruoyi-common-log</artifactId>        </dependency>                <!-- RuoYi Common Swagger -->        <dependency>            <groupId>com.ruoyi</groupId>            <artifactId>ruoyi-common-swagger</artifactId>        </dependency>    </dependencies>    <build>        <finalName>${project.artifactId}</finalName>        <plugins>            <plugin>                <groupId>org.springframework.boot</groupId>                <artifactId>spring-boot-maven-plugin</artifactId>                <executions>                    <execution>                        <Goals>                            <goal>repackage</goal>                        </goals>                    </execution>                </executions>            </plugin>        </plugins>    </build>   </project>

<parent>：配置父工程ruoyi-modules的<groupId><artifactId><version>
<dependencies>：本项目的依赖

如果想引入其他工程，只需要加入：

<!-- RuoYi Common DataScope -->        <dependency>            <groupId>com.ruoyi</groupId>            <artifactId>ruoyi-common-datascope</artifactId>        </dependency>                <!-- RuoYi Common Log -->        <dependency>            <groupId>com.ruoyi</groupId>            <artifactId>ruoyi-common-log</artifactId>        </dependency>                <!-- RuoYi Common Swagger -->        <dependency>            <groupId>com.ruoyi</groupId>            <artifactId>ruoyi-common-swagger</artifactId>        </dependency>

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