maven父工程

父工程一般只需要留一个pom.xml文件就行了。
父工程主要是用于版本管理和模块聚合。

一般最上面是定义的属性

属性中写的是各个依赖的版本，方便下面引用。

<properties>
        <java.version>1.8java.version>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <spring-boot.version>2.3.7.RELEASEspring-boot.version>
        <spring-cloud.version>Hoxton.SR9spring-cloud.version>
        <org.mapstruct.version>1.3.1.Finalorg.mapstruct.version>
        <spring-cloud-alibaba.version>2.2.6.RELEASEspring-cloud-alibaba.version>
        <org.projectlombok.version>1.18.8org.projectlombok.version>
        <javax.servlet-api.version>4.0.1javax.servlet-api.version>
        <fastjson.version>1.2.83fastjson.version>
        <druid-spring-boot-starter.version>1.2.8druid-spring-boot-starter.version>
        <mysql-connector-java.version>8.0.30mysql-connector-java.version>
        <mybatis-plus-boot-starter.version>3.4.1mybatis-plus-boot-starter.version>
        <commons-lang.version>2.6commons-lang.version>
        <minio.version>8.4.3minio.version>
        <xxl-job-core.version>2.3.1xxl-job-core.version>
        <swagger-annotations.version>1.5.20swagger-annotations.version>
        <commons-lang3.version>3.10commons-lang3.version>
        <okhttp.version>4.8.1okhttp.version>
        <swagger-spring-boot-starter.version>1.9.0.RELEASEswagger-spring-boot-starter.version>
        <elasticsearch.version>7.12.1elasticsearch.version>
    properties>
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然后是版本管理

<dependencyManagement>
        <dependencies>

            <dependency>
                <groupId>org.springframework.cloudgroupId>
                <artifactId>spring-cloud-dependenciesartifactId>
                <version>${spring-cloud.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
            <dependency>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-dependenciesartifactId>
                <version>${spring-boot.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
            <dependency>
                <groupId>com.alibaba.cloudgroupId>
                <artifactId>spring-cloud-alibaba-dependenciesartifactId>
                <version>${spring-cloud-alibaba.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
            
            <dependency>
                <groupId>org.projectlombokgroupId>
                <artifactId>lombokartifactId>
                <version>${org.projectlombok.version}version>
            dependency>
            
            <dependency>
                <groupId>org.mapstructgroupId>
                <artifactId>mapstruct-jdk8artifactId>
                <version>${org.mapstruct.version}version>
            dependency>
            <dependency>
                <groupId>org.mapstructgroupId>
                <artifactId>mapstruct-processorartifactId>
                <version>${org.mapstruct.version}version>
            dependency>
            <dependency>
                <groupId>io.swaggergroupId>
                <artifactId>swagger-annotationsartifactId>
                <version>${swagger-annotations.version}version>
            dependency>
            
            <dependency>
                <groupId>javax.servletgroupId>
                <artifactId>javax.servlet-apiartifactId>
                <version>${javax.servlet-api.version}version>
                <scope>providedscope>
            dependency>
            
            <dependency>
                <groupId>com.alibabagroupId>
                <artifactId>fastjsonartifactId>
                <version>${fastjson.version}version>
            dependency>
            
            <dependency>
                <groupId>com.alibabagroupId>
                <artifactId>druid-spring-boot-starterartifactId>
                <version>${druid-spring-boot-starter.version}version>
            dependency>

            
            <dependency>
                <groupId>mysqlgroupId>
                <artifactId>mysql-connector-javaartifactId>
                <version>${mysql-connector-java.version}version>
            dependency>
            
            <dependency>
                <groupId>com.baomidougroupId>
                <artifactId>mybatis-plus-boot-starterartifactId>
                <version>${mybatis-plus-boot-starter.version}version>
            dependency>

            
            <dependency>
                <groupId>com.baomidougroupId>
                <artifactId>mybatis-plus-generatorartifactId>
                <version>${mybatis-plus-boot-starter.version}version>
            dependency>

            
            <dependency>
                <groupId>commons-langgroupId>
                <artifactId>commons-langartifactId>
                <version>${commons-lang.version}version>
            dependency>
            
            <dependency>
                <groupId>io.miniogroupId>
                <artifactId>minioartifactId>
                <version>${minio.version}version>
            dependency>
            
            <dependency>
                <groupId>com.google.guavagroupId>
                <artifactId>guavaartifactId>
                <version>25.0-jreversion>
            dependency>
            
            <dependency>
                <groupId>com.xuxueligroupId>
                <artifactId>xxl-job-coreartifactId>
                <version>${xxl-job-core.version}version>
            dependency>
            
            <dependency>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-starter-testartifactId>
                <version>${spring-boot.version}version>
                <scope>testscope>
                <exclusions>
                    <exclusion>
                        <groupId>org.junit.vintagegroupId>
                        <artifactId>junit-vintage-engineartifactId>
                    exclusion>
                exclusions>
            dependency>
            <dependency>
                <groupId>com.squareup.okhttp3groupId>
                <artifactId>okhttpartifactId>
                <version>${okhttp.version}version>
            dependency>
            <dependency>
                <groupId>org.apache.commonsgroupId>
                <artifactId>commons-lang3artifactId>
                <version>${commons-lang3.version}version>
            dependency>
            <dependency>
                <groupId>com.spring4allgroupId>
                <artifactId>swagger-spring-boot-starterartifactId>
                <version>${swagger-spring-boot-starter.version}version>
            dependency>
            <dependency>
                <groupId>org.elasticsearch.clientgroupId>
                <artifactId>elasticsearch-rest-high-level-clientartifactId>
                <version>${elasticsearch.version}version>
            dependency>

            <dependency>
                <groupId>org.elasticsearchgroupId>
                <artifactId>elasticsearchartifactId>
                <version>${elasticsearch.version}version>
            dependency>
        dependencies>

    dependencyManagement>
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然后是模块聚合

<moudles>
        <moudle>

        moudle>
    moudles>
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