idea如何新建聚合项目

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首先新建父工程

新建spring boot项目

填写项目信息

指定该子项目的路径

如果是组件类型的子项目 可以删除application.xml和启动类

父工程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.demo</groupId>
    <artifactId>project</artifactId>
    <version>1.0.0-SNAPSHOT</version>
 
    <properties>
        <spring-boot.version>2.3.5.RELEASE</spring-boot.version>
    </properties>
 
    <modules>
        <module>common-mail</module>
    </modules>
 
    <packaging>pom</packaging>
 
    <dependencyManagement>
        <dependencies>   
            <dependency>
                <groupId>com.xx</groupId>
                <artifactId>common-assembly</artifactId>
                <version>${vanpeng.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
 
    <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>

<modules>:为包含的子工程artifactId名
<properties>：指常量 一般为版本号 方便统一修改
<dependencyManagement>：指定子工程有相同jar包时，使用父工程的版本号，而子工程不用在额外指定
<dependencies>:为父子工程可以同时引入的jar包

子工程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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.demo</groupId>
        <artifactId>project</artifactId>
        <version>1.0.0-SNAPSHOT</version>
    </parent>
 
    <groupId>com.demo</groupId>
    <artifactId>common-assembly</artifactId>
    <version>1.0.0-SNAPSHOT</version>
 
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
    </properties>
 
    <dependencies>
        <!-- 此处可以引入其他子工程包 -->
	    <dependency>
            <groupId>com.demo</groupId>
            <artifactId>common-resource</artifactId>
        </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>
        <finalName>common-assembly-1.0.0-SNAPSHOT</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <includeSystemScope>true</includeSystemScope>
                    <mainClass>com.demo.assembly.BusinessApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
 
</project>

 <parent>：为父工程的信息 也就是父工程pom中的groupId，artifactId 必填  <build>：为打包时的配置 

注意com.vanpeng.assembly.BusinessApplication一定要配置 否则jar包启动会找不到主函数 pom也必须配置 这是在父子工程中必须配置的 意思是 需要以方式引入 而不是打成jar

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