Maven POM
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POM( Project Object Model，项目对象模型 ) 是 Maven 工程的基本工作单元，是一个XML文件，包含了项目的基本信息，用于描述项目如何构建，声明项目依赖，等等。
执行任务或目标时，Maven 会在当前目录中查找 POM。它读取 POM，获取所需的配置信息，然后执行目标。
POM 中可以指定以下配置：
项目依赖
插件
执行目标
项目构建 profile
项目版本
项目开发者列表
相关邮件列表信息
在创建 POM 之前，我们首先需要描述项目组 (groupId), 项目的唯一ID。
<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.companyname.project-group</groupId> <artifactId>project</artifactId> <version>1.0</version> </project>
所有 POM 文件都需要 project 元素和三个必需字段：groupId，artifactId，version。
节点 描述project
project 工程的根标签。
modelVersion 模型版本需要设置为 4.0。
groupId 这是工程组的标识。它在一个组织或者项目中通常是唯一的。例如，一个银行组织 com.companyname.project-group 拥有所有的和银行相关的项目。
artifactId 这是工程的标识。它通常是工程的名称。例如，消费者银行。groupId 和 artifactId 一起定义了 artifact 在仓库中的位置。
version 这是工程的版本号。在 artifact 的仓库中，它用来区分不同的版本。例如：com.company.bank:consumer-banking:1.0
com.company.bank:consumer-banking:1.1
POM 标签详解
<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/4.0.0http://maven.apache.org/maven-v4_0_0.xsd"> <parent> <artifactId /> <groupId /> <version /> <relativePath /> </parent> <modelVersion>4.0.0</modelVersion> <groupId>asia.banseon</groupId> <artifactId>banseon-maven2</artifactId> <packaging>jar</packaging> <version>1.0-SNAPSHOT</version> <name>banseon-maven</name> <url>http://www.baidu.com/banseon</url> <description>A maven project to study maven.</description> <prerequisites> <maven /> </prerequisites> <issueManagement> <system>jira</system> <url>http://jira.baidu.com/banseon</url> </issueManagement> <ciManagement> <system /> <url /> <notifiers> <notifier> <type /> <sendOnError /> <sendOnFailure /> <sendOnSuccess /> <sendOnWarning /> <address /> <configuration /> </notifier> </notifiers> </ciManagement> <inceptionYear /> <mailingLists> <mailingList> <name>Demo</name> <post>banseon@126.com</post> <subscribe>banseon@126.com</subscribe> <unsubscribe>banseon@126.com</unsubscribe> <archive>http:/hi.baidu.com/banseon/demo/dev/</archive> </mailingList> </mailingLists> <developers> <developer> <id>HELLO WORLD</id> <name>banseon</name> <email>banseon@126.com</email> <url /> <roles> <role>Project Manager</role> <role>Architect</role> </roles> <organization>demo</organization> <organizationUrl>http://hi.baidu.com/banseon</organizationUrl> <properties> <dept>No</dept> </properties> <timezone>-5</timezone> </developer> </developers> <contributors> <contributor> <name /> <email /> <url /> <organization /> <organizationUrl /> <roles /> <timezone /> <properties /> </contributor> </contributors> <licenses> <license> <name>Apache 2</name> <url>http://www.baidu.com/banseon/LICENSE-2.0.txt</url> <distribution>repo</distribution> <comments>A business-friendly OSS license</comments> </license> </licenses> <scm> <connection> scm:svn:http://svn.baidu.com/banseon/maven/banseon/banseon-maven2-trunk(dao-trunk) </connection> <developerConnection> scm:svn:http://svn.baidu.com/banseon/maven/banseon/dao-trunk </developerConnection> <tag /> <url>http://svn.baidu.com/banseon</url> </scm> <organization> <name>demo</name> <url>http://www.baidu.com/banseon</url> </organization> <build> <sourceDirectory /> <scriptSourceDirectory /> <testSourceDirectory /> <outputDirectory /> <testOutputDirectory /> <extensions> <extension> <groupId /> <artifactId /> <version /> </extension> </extensions> <defaultGoal /> <resources> <resource> <targetPath /> <filtering /> <directory /> <includes /> <excludes /> </resource> </resources> <testResources> <testResource> <targetPath /> <filtering /> <directory /> <includes /> <excludes /> </testResource> </testResources> <directory /> <finalName /> <filters /> <pluginManagement> <plugins> <plugin> <groupId /> <artifactId /> <version /> <extensions /> <executions> <execution> <id /> <phase /> <goals /> <inherited /> <configuration /> </execution> </executions> <dependencies> <dependency> ...... </dependency> </dependencies> <inherited /> <configuration /> </plugin> </plugins> </pluginManagement> <plugins> <plugin> <groupId /> <artifactId /> <version /> <extensions /> <executions> <execution> <id /> <phase /> <goals /> <inherited /> <configuration /> </execution> </executions> <dependencies> <dependency> ...... </dependency> </dependencies> <goals /> <inherited /> <configuration /> </plugin> </plugins> </build> <profiles> <profile> <id /> <activation> <activeByDefault /> <jdk /> <os> <name>Windows XP</name> <family>Windows</family> <arch>x86</arch> <version>5.1.2600</version> </os> <property> <name>mavenVersion</name> <value>2.0.3</value> </property> <file> <exists>/usr/local/hudson/hudson-home/jobs/maven-guide-zh-to-production/workspace/ </exists> <missing>/usr/local/hudson/hudson-home/jobs/maven-guide-zh-to-production/workspace/ </missing> </file> </activation> <build> <defaultGoal /> <resources> <resource> <targetPath /> <filtering /> <directory /> <includes /> <excludes /> </resource> </resources> <testResources> <testResource> <targetPath /> <filtering /> <directory /> <includes /> <excludes /> </testResource> </testResources> <directory /> <finalName /> <filters /> <pluginManagement> <plugins> <plugin> <groupId /> <artifactId /> <version /> <extensions /> <executions> <execution> <id /> <phase /> <goals /> <inherited /> <configuration /> </execution> </executions> <dependencies> <dependency> ...... </dependency> </dependencies> <goals /> <inherited /> <configuration /> </plugin> </plugins> </pluginManagement> <plugins> <plugin> <groupId /> <artifactId /> <version /> <extensions /> <executions> <execution> <id /> <phase /> <goals /> <inherited /> <configuration /> </execution> </executions> <dependencies> <dependency> ...... </dependency> </dependencies> <goals /> <inherited /> <configuration /> </plugin> </plugins> </build> <modules /> <repositories> <repository> <releases> <enabled /> <updatePolicy /> <checksumPolicy /> </releases> <snapshots> <enabled /> <updatePolicy /> <checksumPolicy /> </snapshots> <id /> <name /> <url /> <layout /> </repository> </repositories> <pluginRepositories> <pluginRepository> <releases> <enabled /> <updatePolicy /> <checksumPolicy /> </releases> <snapshots> <enabled /> <updatePolicy /> <checksumPolicy /> </snapshots> <id /> <name /> <url /> <layout /> </pluginRepository> </pluginRepositories> <dependencies> <dependency> ...... </dependency> </dependencies> <reports /> <reporting> ...... </reporting> <dependencyManagement> <dependencies> <dependency> ...... </dependency> </dependencies> </dependencyManagement> <distributionManagement> ...... </distributionManagement> <properties /> </profile> </profiles> <modules /> <repositories> <repository> <releases> <enabled /> <updatePolicy /> <checksumPolicy /> </releases> <snapshots> <enabled /> <updatePolicy /> <checksumPolicy /> </snapshots> <id>banseon-repository-proxy</id> <name>banseon-repository-proxy</name> <url>http://192.168.1.169:9999/repository/</url> <layout>default</layout> </repository> </repositories> <pluginRepositories> <pluginRepository> ...... </pluginRepository> </pluginRepositories> <dependencies> <dependency> <groupId>org.apache.maven</groupId> <artifactId>maven-artifact</artifactId> <version>3.8.1</version> <type>jar</type> <classifier></classifier> <scope>test</scope> <systemPath></systemPath> <exclusions> <exclusion> <artifactId>spring-core</artifactId> <groupId>org.springframework</groupId> </exclusion> </exclusions> <optional>true</optional> </dependency> </dependencies> <reports></reports> <reporting> <excludeDefaults /> <outputDirectory /> <plugins> <plugin> <groupId /> <artifactId /> <version /> <inherited /> <configuration /> <reportSets> <reportSet> <id /> <configuration /> <inherited /> <reports /> </reportSet> </reportSets> </plugin> </plugins> </reporting> <dependencyManagement> <dependencies> <dependency> ...... </dependency> </dependencies> </dependencyManagement> <distributionManagement> <repository> <uniqueVersion /> <id>banseon-maven2</id> <name>banseon maven2</name> <url>file://${basedir}/target/deploy</url> <layout /> </repository> <snapshotRepository> <uniqueVersion /> <id>banseon-maven2</id> <name>Banseon-maven2 Snapshot Repository</name> <url>scp://svn.baidu.com/banseon:/usr/local/maven-snapshot</url> <layout /> </snapshotRepository> <site> <id>banseon-site</id> <name>business api website</name> <url> scp://svn.baidu.com/banseon:/var/www/localhost/banseon-web </url> </site> <downloadUrl /> <relocation> <groupId /> <artifactId /> <version /> <message /> </relocation> <status /> </distributionManagement> <properties />
</project>
