Pom文件的作用:pom.xml文件描述了maven项目的基本信息,比如groupId,artifactId,version等。也可以对maven项目的远程仓库,打包形式,资源依赖关系等进行配置。一个最简单的pom.xml文件至少需要包含四个元素:modelVersion, groupId, artiffactId和version。
<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">
<!--父项目的坐标。如果项目中没有规定某个元素的值,那么父项目中的对应值即为项目的默认值。 坐标包括
group ID,artifact ID和 version。-->
<parent>
<artifactId/>
<!--被继承的父项目的全球唯一标识符-->
<groupId/>
<version/>
<!-- 父项目的pom.xml文件的相对路径。相对路径允许你选择一个不同的路径。默认值是../pom.xml。Maven首先
在构建当前项目的地方寻找父项 目的pom,其次在文件系统的这个位置(relativePath位置),然后在本地仓库,最
后在远程仓库寻找父项目的pom。-->
<relativePath/>
</parent>
<!--声明项目描述符遵循哪一个POM模型版本。模型本身的版本很少改变,虽然如此,但它仍然是必不可少的,这是为了当Maven引入了新的特性或者其他模型变更的时候,确保稳定性。-->
<modelVersion>4.0.0</modelVersion>
<groupId>asia.banseon</groupId>
<!-- 构件的标识符,它和group ID一起唯一标识一个构件。换句话说,你不能有两个不同的项目拥有同样的artifact ID和groupID;在某个特定的group ID下,artifact ID也必须是唯一的。构件是项目产生的或使用的一个东西,Maven为项目产生的构件包括:JARs,源码,二进制发布和WARs等。-->
<artifactId>banseon-maven2</artifactId>
<!--项目产生的构件类型,例如jar、war、ear、pom。插件可以创建他们自己的构件类型,所以前面列的不是全部构件类型-->
<packaging>jar</packaging>
<!--项目当前版本,格式为:主版本.次版本.增量版本-限定版本号-->
<version>1.0-SNAPSHOT</version>
<!--项目的名称, Maven产生的文档用-->
<name>banseon-maven</name>
<!--项目主页的URL, Maven产生的文档用-->
<url>http://www.baidu.com/banseon</url>
<!-- 项目的详细描述, Maven 产生的文档用。 当这个元素能够用HTML格式描述时(例如,CDATA中的文本会被解析器忽略,就可以包含HTML标 签), 不鼓励使用纯文本描述。如果你需要修改产生的web站点的索引页面,你应该修改你自己的索引页文件,而不是调整这里的文档。-->
<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>
<!--项目分发的主要方式:
repo,可以从Maven库下载
manual, 用户必须手动下载和安装依赖-->
<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>
<!--如果Maven检测到某一个属性(其值可以在POM中通过${名称}引用),其拥有对应的名称和值,Profile就会被激活。如果值
字段是空的,那么存在属性名称字段就会激活profile,否则按区分大小写方式匹配属性值字段-->
<property>
<name>mavenVersion</name>
<value>2.0.3</value>
</property>
<!--提供一个文件名,通过检测该文件的存在或不存在来激活profile。missing检查文件是否存在,如果不存在则激活
profile。另一方面,exists则会检查文件是否存在,如果存在则激活profile。-->
<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>
<!--依赖范围。在项目发布过程中,帮助决定哪些构件被包括进来。欲知详情请参考依赖机制。
- compile :默认范围,用于编译
- provided:类似于编译,但支持你期待jdk或者容器提供,类似于classpath
- runtime: 在执行时需要使用
- test: 用于test任务时使用
- system: 需要外在提供相应的元素。通过systemPath来取得
- systemPath: 仅用于范围为system。提供相应的路径
- optional: 当项目自身被依赖时,标注依赖是否传递。用于连续依赖时使用-->
<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>
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