BOM全称是Bill Of Materials，译作材料清单。BOM本身并不是一种特殊的文件格式，而是一个普通的POM文件。只是在这个POM中，罗列出工程需要的所有依赖和其对应的版本。当其它工程引用BOM中罗列的jar包时，不用显示指定具体的版本，会自动使用BOM对应的jar版本。BOM的维护人员负责版本升级，并保证BOM中定义的jar包版本之间的兼容性。

工程基础父项目

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  6.     <parent>
  7.         <groupId>org.springframework.boot</groupId>
  8.         <artifactId>spring-boot-starter-parent</artifactId>
  9.         <version>2.3.6.RELEASE</version>
  10.         <relativePath/> <!-- lookup parent from repository -->
  11.     </parent>
  13.     <groupId>com.jyusun.origin</groupId>
  14.     <artifactId>origin-parent</artifactId>
  15.     <version>1.0.0-SNAPSHOT</version>
  16.     <name>${project.artifactId}</name>
  17.     <packaging>pom</packaging>
  18.     <description>服务基础父项目</description>
  20.     <!-- 许可信息 -->
  21.     <licenses>
  22.         <license>
  23.             <name>The Apache Software License, Version 2.0</name>
  24.             <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
  25.             <comments>A business-friendly OSS license</comments>
  26.         </license>
  27.     </licenses>
  29.     <!-- 开发者信息 -->
  30.     <developers>
  31.         <developer>
  32.             <id>jyusun</id>
  33.             <name>ayu</name>
  34.             <email>jyusun@foxmail.com</email>
  35.         </developer>
  36.     </developers>
  38.     <properties>
  39.         <!-- JDK版本 -->
  40.         <java.version>1.8</java.version>
  41.         <maven.compiler.source>${java.version}</maven.compiler.source>
  42.         <maven.compiler.target>${java.version}</maven.compiler.target>
  44.         <!-- 基础编码字符集 -->
  45.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  46.         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  47.         <charset.UTF8>UTF-8</charset.UTF8>
  49.         <!-- Projects 版本配置 -->
  50.         <origin.release.version>1.0.0.RELEASE</origin.release.version>
  51.         <origin.development.version>1.0.0-SNAPSHOT</origin.development.version>
  53.         <!-- Maven私服仓库地址 -->
  54.         <releases.url>http://nexus.jyusun.com/repository/maven-releases/</releases.url>
  55.         <snapshot.url>http://nexus.jyusun.com/repository/maven-snapshots/</snapshot.url>
  56.     </properties>
  58.     <!-- Nexus私服仓库部署配置 -->
  59.     <distributionManagement>
  60.         <repository>
  61.             <id>nexus-releases</id>
  62.             <url>${releases.url}</url>
  63.         </repository>
  64.         <snapshotRepository>
  65.             <id>nexus-snapshots</id>
  66.             <url>${snapshot.url}</url>
  67.         </snapshotRepository>
  68.     </distributionManagement>
  70. </project>

维护一些私服信息，字符集编码等

依赖管理BOM

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  6.     <parent>
  7.         <groupId>com.jyusun.origin</groupId>
  8.         <artifactId>origin-parent</artifactId>
  9.         <version>1.0.0-SNAPSHOT</version>
  10.         <relativePath/>
  11.     </parent>
  13.     <groupId>com.jyusun.origin</groupId>
  14.     <artifactId>origin-dependencies</artifactId>
  15.     <version>1.0.0-SNAPSHOT</version>
  16.     <name>${project.artifactId}</name>
  17.     <packaging>pom</packaging>
  18.     <description>三方依赖管理</description>
  20.     <properties>
  21.         <!-- 工具版本管理 -->
  22.         <lombok.version>1.18.10</lombok.version>
  23.         <dubbo-serialization-kryo.version>2.6.8</dubbo-serialization-kryo.version>
  24.         <fastjson.version>1.2.75</fastjson.version>
  25.         <bitwalker.version>1.21</bitwalker.version>
  27.     </properties>
  29.     <dependencyManagement>
  30.         <dependencies>
  31.             <!-- caffeine guava-->
  32.             <dependency>
  33.                 <groupId>com.github.ben-manes.caffeine</groupId>
  34.                 <artifactId>guava</artifactId>
  35.             </dependency>
  36.             <!-- lombok -->
  37.             <dependency>
  38.                 <groupId>org.projectlombok</groupId>
  39.                 <artifactId>lombok</artifactId>
  40.                 <version>${lombok.version}</version>
  41.                 <scope>compile</scope>
  42.             </dependency>
  43.             <!-- Kryo 序列化 -->
  44.             <dependency>
  45.                 <groupId>com.alibaba</groupId>
  46.                 <artifactId>dubbo-serialization-kryo</artifactId>
  47.                 <version>${dubbo-serialization-kryo.version}</version>
  48.             </dependency>
  50.             <!-- 用户代理 -->
  51.             <dependency>
  52.                 <groupId>eu.bitwalker</groupId>
  53.                 <artifactId>UserAgentUtils</artifactId>
  54.                 <version>${bitwalker.version}</version>
  55.             </dependency>
  57.             <!-- 阿里巴巴FastJson-->
  58.             <dependency>
  59.                 <groupId>com.alibaba</groupId>
  60.                 <artifactId>fastjson</artifactId>
  61.                 <version>${fastjson.version}</version>
  62.             </dependency>
  64.         </dependencies>
  65.     </dependencyManagement>
  66. </project>

此pom文件只做依赖管理：

  • <packaging>pom</packaging>打包方式是pom文件
  • <dependencyManagement><dependencies>下定义的各种依赖的版本

工程父项目

origin-system-parent pom.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.     <parent>
  6.         <groupId>com.jyusun.origin</groupId>
  7.         <artifactId>origin-parent</artifactId>
  8.         <version>1.0.0-SNAPSHOT</version>
  9.     </parent>
  11.     <artifactId>origin-system-parent</artifactId>
  12.     <version>1.0.0-SNAPSHOT</version>
  13.     <name>${project.artifactId}</name>
  14.     <packaging>pom</packaging>
  15.     <description>系统父项目</description>
  17.     <properties>
  18.         <!-- Spring Projects-->
  19.         <spring-cloud.version>Hoxton.SR9</spring-cloud.version>
  20.         <spring-cloud-alibaba.version>2.2.3.RELEASE</spring-cloud-alibaba.version>
  21.     </properties>
  23.     <!-- Origin 依赖管理 -->
  24.     <dependencyManagement>
  25.         <dependencies>
  26.             <!-- 三方依赖管理-->
  27.             <dependency>
  28.                 <groupId>${project.groupId}</groupId>
  29.                 <artifactId>origin-dependencies</artifactId>
  30.                 <version>${origin-dependencies.version}</version>
  31.                 <type>pom</type>
  32.                 <scope>import</scope>
  33.             </dependency>
  35.         </dependencies>
  36.     </dependencyManagement>
  38. </project>

此pom文件维护引用bom文件、maven插件等

示例工程引用

在工程中直接指向父项目，版本即可传递过来

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  6.     <parent>
  7.         <groupId>com.jyusun.origin</groupId>
  8.         <artifactId>origin-system-parent</artifactId>
  9.         <version>1.0.0-SNAPSHOT</version>
  10.     </parent>
  12.     <artifactId>origin-commons-core</artifactId>
  13.     <name>${project.artifactId}</name>
  14.     <version>1.0.0-SNAPSHOT</version>
  15.     <packaging>jar</packaging>
  16.     <description>公共-核心工具</description>
  18.     <dependencies>
  19.         <!-- Lombok-->
  20.         <dependency>
  21.             <groupId>org.projectlombok</groupId>
  22.             <artifactId>lombok</artifactId>
  23.         </dependency>
  24.         <!-- slf4j-api  -->
  25.         <dependency>
  26.             <groupId>org.slf4j</groupId>
  27.             <artifactId>slf4j-api</artifactId>
  28.         </dependency>
  30.         <!-- 用户代理信息处理 -->
  31.         <dependency>
  32.             <groupId>eu.bitwalker</groupId>
  33.             <artifactId>UserAgentUtils</artifactId>
  34.         </dependency>
  36.         <!-- Alibaba fastjson -->
  37.         <dependency>
  38.             <groupId>com.alibaba</groupId>
  39.             <artifactId>fastjson</artifactId>
  40.         </dependency>
  41.         <!-- caffeine guava-->
  42.         <dependency>
  43.             <groupId>com.github.ben-manes.caffeine</groupId>
  44.             <artifactId>guava</artifactId>
  45.         </dependency>
  46.         <!--  Apache Lang 处理 -->
  47.         <dependency>
  48.             <groupId>org.apache.commons</groupId>
  49.             <artifactId>commons-lang3</artifactId>
  50.         </dependency>
  51.         <!-- Apache Collections 处理 -->
  52.         <dependency>
  53.             <groupId>org.apache.commons</groupId>
  54.             <artifactId>commons-collections4</artifactId>
  55.         </dependency>
  56.         <!-- 格式验证 -->
  57.         <dependency>
  58.             <groupId>io.swagger</groupId>
  59.             <artifactId>swagger-annotations</artifactId>
  60.         </dependency>
  61.         <dependency>
  62.             <groupId>org.hibernate.validator</groupId>
  63.             <artifactId>hibernate-validator</artifactId>
  64.             <scope>compile</scope>
  65.         </dependency>
  67.         <dependency>
  68.             <groupId>javax.servlet</groupId>
  69.             <artifactId>javax.servlet-api</artifactId>
  70.             <scope>provided</scope>
  71.         </dependency>
  73.     </dependencies>
  75. </project>

示例工程引用

指定父项目，直接引用依赖的jar即可