pom作為項目對象模型。通過xml表示
maven項目,使用pom.xml來實現。主要描述了項目:包括配置文件;開發者需要遵循的規則,缺陷管理系統,組織和licenses,項目的url,項目的依賴性,以及其他所有的項目相關因素。
快速察看:
- <project> ??
- ????<modelVersion>4.0.0</modelVersion> ??
- ??
- ????<!--?The?Basics?--> ??
- ????<groupId>...</groupId> ??
- ????<artifactId>...</artifactId> ??
- ????<version>...</version> ??
- ????<packaging>...</packaging> ??
- ????<dependencies>...</dependencies> ??
- ????<parent>...</parent> ??
- ????<dependencyManagement>...</dependencyManagement> ??
- ????<modules>...</modules> ??
- ????<properties>...</properties> ??
- ??
- ????<!--?Build?Settings?--> ??
- ????<build>...</build> ??
- ????<reporting>...</reporting> ??
- ??
- ????<!--?More?Project?Information?--> ??
- ????<name>...</name> ??
- ????<description>...</description> ??
- ????<url>...</url> ??
- ????<inceptionYear>...</inceptionYear> ??
- ????<licenses>...</licenses> ??
- ????<organization>...</organization> ??
- ????<developers>...</developers> ??
- ????<contributors>...</contributors> ??
- ??
- ????<!--?Environment?Settings?--> ??
- ????<issueManagement>...</issueManagement> ??
- ????<ciManagement>...</ciManagement> ??
- ????<mailingLists>...</mailingLists> ??
- ????<scm>...</scm> ??
- ????<prerequisites>...</prerequisites> ??
- ????<repositories>...</repositories> ??
- ????<pluginRepositories>...</pluginRepositories> ??
- ????<distributionManagement>...</distributionManagement> ??
- ????<profiles>...</profiles> ??
- </project>??
<project>
<modelVersion>4.0.0</modelVersion>
<!-- The Basics -->
<groupId>...</groupId>
<artifactId>...</artifactId>
<version>...</version>
<packaging>...</packaging>
<dependencies>...</dependencies>
<parent>...</parent>
<dependencyManagement>...</dependencyManagement>
<modules>...</modules>
<properties>...</properties>
<!-- Build Settings -->
<build>...</build>
<reporting>...</reporting>
<!-- More Project Information -->
<name>...</name>
<description>...</description>
<url>...</url>
<inceptionYear>...</inceptionYear>
<licenses>...</licenses>
<organization>...</organization>
<developers>...</developers>
<contributors>...</contributors>
<!-- Environment Settings -->
<issueManagement>...</issueManagement>
<ciManagement>...</ciManagement>
<mailingLists>...</mailingLists>
<scm>...</scm>
<prerequisites>...</prerequisites>
<repositories>...</repositories>
<pluginRepositories>...</pluginRepositories>
<distributionManagement>...</distributionManagement>
<profiles>...</profiles>
</project>
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?
- <!--?The?Basics?--> ??
- ????<groupId>...</groupId> ??
- ????<artifactId>...</artifactId> ??
- ????<version>...</version> ??
- ????<packaging>...</packaging> ??
- ????<dependencies>...</dependencies> ??
- ????<parent>...</parent> ??
- ????<dependencyManagement>...</dependencyManagement> ??
- ????<modules>...</modules> ??
- ????<properties>...</properties>??
<!-- The Basics -->
<groupId>...</groupId>
<artifactId>...</artifactId>
<version>...</version>
<packaging>...</packaging>
<dependencies>...</dependencies>
<parent>...</parent>
<dependencyManagement>...</dependencyManagement>
<modules>...</modules>
<properties>...</properties>
?
基本內容:
????POM包括了所有的項目信息。
maven?相關:
pom定義了最小的maven2元素,允許groupId,artifactId,version。所有需要的元素
groupId:項目或者組織的唯一標志,并且配置時生成的路徑也是由此生成,如org.codehaus.mojo生成的相對路徑為:/org/codehaus/mojo?
artifactId:?項目的通用名稱?
version:項目的版本?
packaging:?打包的機制,如pom,?jar,?maven-plugin,?ejb,?war,?ear,?rar,?par?
classifier:?分類
POM關系:
主要為依賴,繼承,合成
??依賴關系:
??<dependencies>
????<dependency>
??????<groupId>junit</groupId>
??????<artifactId>junit</artifactId>
??????<version>4.0</version>
??????<type>jar</type>
??????<scope>test</scope>
??????<optional>true</optional>
????</dependency>
????...
??</dependencies>
groupId,?artifactId,?version:描述了依賴的項目唯一標志
可以通過以下方式進行安裝:
使用以下的命令安裝:?
mvn?install:install-file??Dfile=non-maven-proj.jar??DgroupId=some.group??DartifactId=non-maven-proj??Dversion=1?
創建自己的庫,并配置,使用deploy:deploy-file?
設置此依賴范圍為system,定義一個系統路徑。不提倡。
type:相應的依賴產品包形式,如jar,war?
scope:用于限制相應的依賴范圍,包括以下的幾種變量:
compile?:默認范圍,用于編譯?
provided:類似于編譯,但支持你期待jdk或者容器提供,類似于classpath?
runtime:在執行時,需要使用?
test:用于test任務時使用?
system:需要外在提供相應得元素。通過systemPath來取得
systemPath:?僅用于范圍為system。提供相應的路徑?
optional:?標注可選,當項目自身也是依賴時。用于連續依賴時使用
???獨占性????
???外在告訴maven你只包括指定的項目,不包括相關的依賴。此因素主要用于解決版本沖突問題
??<dependencies>
????<dependency>
??????<groupId>org.apache.maven</groupId>
??????<artifactId>maven-embedder</artifactId>
??????<version>2.0</version>
??????<exclusions>
????????<exclusion>
??????????<groupId>org.apache.maven</groupId>
??????????<artifactId>maven-core</artifactId>
????????</exclusion>
??????</exclusions>
????</dependency>
表示項目maven-embedder需要項目maven-core,但我們不想引用maven-core
繼承關系
????另一個強大的變化,maven帶來的是項目繼承。主要的設置:
定義父項目
<project>
??<modelVersion>4.0.0</modelVersion>
??<groupId>org.codehaus.mojo</groupId>
??<artifactId>my-parent</artifactId>
??<version>2.0</version>
??<packaging>pom</packaging>
</project>
????packaging?類型,需要pom用于parent和合成多個項目。我們需要增加相應的值給父pom,用于子項目繼承。主要的元素如下:
依賴型?
開發者和合作者?
插件列表?
報表列表?
插件執行使用相應的匹配ids?
插件配置?
子項目配置
<project>
??<modelVersion>4.0.0</modelVersion>
??<parent>
????<groupId>org.codehaus.mojo</groupId>
????<artifactId>my-parent</artifactId>
????<version>2.0</version>
????<relativePath>../my-parent</relativePath>
??</parent>
??<artifactId>my-project</artifactId>
</project>
relativePath可以不需要,但是用于指明parent的目錄,用于快速查詢。
dependencyManagement:
用于父項目配置共同的依賴關系,主要配置依賴包相同因素,如版本,scope。
合成(或者多個模塊)
????一個項目有多個模塊,也叫做多重模塊,或者合成項目。
如下的定義:
<project>
??<modelVersion>4.0.0</modelVersion>
??<groupId>org.codehaus.mojo</groupId>
??<artifactId>my-parent</artifactId>
??<version>2.0</version>
??<modules>
????<module>my-project1<module>
????<module>my-project2<module>
??</modules>
</project>
?
?
?
?
- <!--?Build?Settings?--> ??
- ????<build>...</build> ??
- ????<reporting>...</reporting>??
<!-- Build Settings -->
<build>...</build>
<reporting>...</reporting>
?
build?設置
????主要用于編譯設置,包括兩個主要的元素,build和report
??build
????主要分為兩部分,基本元素和擴展元素集合
注意:包括項目build和profile?build
<project>
??<!--?"Project?Build"?contains?more?elements?than?just?the?BaseBuild?set?-->
??<build>...</build>
??<profiles>
????<profile>
??????<!--?"Profile?Build"?contains?a?subset?of?"Project?Build"s?elements?-->
??????<build>...</build>
????</profile>
??</profiles>
</project>
基本元素
<build>
??<defaultGoal>install</defaultGoal>
??<directory>${basedir}/target</directory>
??<finalName>${artifactId}-${version}</finalName>
??<filters>
????<filter>filters/filter1.properties</filter>
??</filters>
??...
</build>
defaultGoal:?定義默認的目標或者階段。如install?
directory:?編譯輸出的目錄?
finalName:?生成最后的文件的樣式?
filter:?定義過濾,用于替換相應的屬性文件,使用maven定義的屬性。設置所有placehold的值
資源(resources)
????你項目中需要指定的資源。如spring配置文件,log4j.properties
<project>
??<build>
????...
????<resources>
??????<resource>
????????<targetPath>META-INF/plexus</targetPath>
????????<filtering>false</filtering>
????????<directory>${basedir}/src/main/plexus</directory>
????????<includes>
??????????<include>configuration.xml</include>
????????</includes>
????????<excludes>
??????????<exclude>**/*.properties</exclude>
????????</excludes>
??????</resource>
????</resources>
????<testResources>
??????...
????</testResources>
????...
??</build>
</project>
resources:?resource的列表,用于包括所有的資源?
targetPath:?指定目標路徑,用于放置資源,用于build?
filtering:?是否替換資源中的屬性placehold?
directory:?資源所在的位置?
includes:?樣式,包括那些資源?
excludes:?排除的資源?
testResources:?測試資源列表
插件
??在build時,執行的插件,比較有用的部分,如使用jdk?5.0編譯等等
<project>
??<build>
????...
????<plugins>
??????<plugin>
????????<groupId>org.apache.maven.plugins</groupId>
????????<artifactId>maven-jar-plugin</artifactId>
????????<version>2.0</version>
????????<extensions>false</extensions>
????????<inherited>true</inherited>
????????<configuration>
??????????<classifier>test</classifier>
????????</configuration>
????????<dependencies>...</dependencies>
????????<executions>...</executions>
??????</plugin>
????</plugins>
??</build>
</project>
extensions:?true?or?false,是否裝載插件擴展。默認false?
inherited:?true?or?false,是否此插件配置將會應用于poms,那些繼承于此的項目?
configuration:?指定插件配置?
dependencies:?插件需要依賴的包?
executions:?用于配置execution目標,一個插件可以有多個目標。
如下:
????<plugin>
????????<artifactId>maven-antrun-plugin</artifactId>
????????<executions>
??????????<execution>
????????????<id>echodir</id>
????????????<goals>
??????????????<goal>run</goal>
????????????</goals>
????????????<phase>verify</phase>
????????????<inherited>false</inherited>
????????????<configuration>
??????????????<tasks>
????????????????<echo>Build?Dir:?${project.build.directory}</echo>
??????????????</tasks>
????????????</configuration>
??????????</execution>
????????</executions>
??????</plugin>
??說明:
id:規定execution?的唯一標志?
goals:?表示目標?
phase:?表示階段,目標將會在什么階段執行?
inherited:?和上面的元素一樣,設置false?maven將會拒絕執行繼承給子插件?
configuration:?表示此執行的配置屬性
插件管理
????pluginManagement:插件管理以同樣的方式包括插件元素,用于在特定的項目中配置。所有繼承于此項目的子項目都能使用。主要定義插件的共同元素
擴展元素集合
主要包括以下的元素:
Directories
用于設置各種目錄結構,如下:
??<build>
????<sourceDirectory>${basedir}/src/main/java</sourceDirectory>
????<scriptSourceDirectory>${basedir}/src/main/scripts</scriptSourceDirectory>
????<testSourceDirectory>${basedir}/src/test/java</testSourceDirectory>
????<outputDirectory>${basedir}/target/classes</outputDirectory>
????<testOutputDirectory>${basedir}/target/test-classes</testOutputDirectory>
????...
??</build>
Extensions
表示需要擴展的插件,必須包括進相應的build路徑。
<project>
??<build>
????...
????<extensions>
??????<extension>
????????<groupId>org.apache.maven.wagon</groupId>
????????<artifactId>wagon-ftp</artifactId>
????????<version>1.0-alpha-3</version>
??????</extension>
????</extensions>
????...
??</build>
</project>
Reporting
????用于在site階段輸出報表。特定的maven?插件能輸出相應的定制和配置報表。
??<reporting>
????<plugins>
??????<plugin>
????????<outputDirectory>${basedir}/target/site</outputDirectory>
????????<artifactId>maven-project-info-reports-plugin</artifactId>
????????<reportSets>
??????????<reportSet></reportSet>
????????</reportSets>
??????</plugin>
????</plugins>
??</reporting>
Report?Sets
????用于配置不同的目標,應用于不同的報表
<reporting>
????<plugins>
??????<plugin>
????????...
????????<reportSets>
??????????<reportSet>
????????????<id>sunlink</id>
????????????<reports>
??????????????<report>javadoc</report>
????????????</reports>
????????????<inherited>true</inherited>
????????????<configuration>
??????????????<links>
????????????????<link>http://java.sun.com/j2se/1.5.0/docs/api/</link> ;
??????????????</links>
????????????</configuration>
??????????</reportSet>
????????</reportSets>
??????</plugin>
????</plugins>
??</reporting>
?
?
?
?
?
- <!--?More?Project?Information?--> ??
- ????<name>...</name> ??
- ????<description>...</description> ??
- ????<url>...</url> ??
- ????<inceptionYear>...</inceptionYear> ??
- ????<licenses>...</licenses> ??
- ????<organization>...</organization> ??
- ????<developers>...</developers> ??
- ????<contributors>...</contributors>??
<!-- More Project Information -->
<name>...</name>
<description>...</description>
<url>...</url>
<inceptionYear>...</inceptionYear>
<licenses>...</licenses>
<organization>...</organization>
<developers>...</developers>
<contributors>...</contributors>
?
更多的項目信息
name:項目除了artifactId外,可以定義多個名稱
description:?項目描述
url:?項目url
inceptionYear:創始年份
Licenses
<licenses>
??<license>
????<name>Apache?2</name>
????<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url> ;
????<distribution>repo</distribution>
????<comments>A?business-friendly?OSS?license</comments>
??</license>
</licenses>
?
?
?
?
?
?
?
?
?
?
?
- <!--?Environment?Settings?--> ??
- <issueManagement>...</issueManagement> ??
- <ciManagement>...</ciManagement> ??
- <mailingLists>...</mailingLists> ??
- <scm>...</scm> ??
- <prerequisites>...</prerequisites> ??
- <repositories>...</repositories> ??
- <pluginRepositories>...</pluginRepositories> ??
- <distributionManagement>...</distributionManagement> ??
- <profiles>...</profiles>??
<!-- Environment Settings -->
<issueManagement>...</issueManagement>
<ciManagement>...</ciManagement>
<mailingLists>...</mailingLists>
<scm>...</scm>
<prerequisites>...</prerequisites>
<repositories>...</repositories>
<pluginRepositories>...</pluginRepositories>
<distributionManagement>...</distributionManagement>
<profiles>...</profiles>
?
Organization
配置組織信息
??<organization>
????<name>Codehaus?Mojo</name>
????<url>http://mojo.codehaus.org</url> ;
??</organization>
Developers
配置開發者信息
<developers>
????<developer>
??????<id>eric</id>
??????<name>Eric</name>
??????<email>eredmond@codehaus.org</email>
??????<url>http://eric.propellors.net</url> ;
??????<organization>Codehaus</organization>
??????<organizationUrl>http://mojo.codehaus.org</organizationUrl> ;
??????<roles>
????????<role>architect</role>
????????<role>developer</role>
??????</roles>
??????<timezone>-6</timezone>
??????<properties>
????????<picUrl>http://tinyurl.com/prv4t</picUrl> ;
??????</properties>
????</developer>
??</developers>
Contributors
??<contributors>
????<contributor>
??????<name>Noelle</name>
??????<email>some.name@gmail.com</email>
??????<url>http://noellemarie.com</url> ;
??????<organization>Noelle?Marie</organization>
??????<organizationUrl>http://noellemarie.com</organizationUrl> ;
??????<roles>
????????<role>tester</role>
??????</roles>
??????<timezone>-5</timezone>
??????<properties>
????????<gtalk>some.name@gmail.com</gtalk>
??????</properties>
????</contributor>
??</contributors>
環境設置
Issue?Management
????定義相關的bug跟蹤系統,如bugzilla,testtrack,clearQuest等
??<issueManagement>
????<system>Bugzilla</system>
????<url>http://127.0.0.1/bugzilla</url> ;
??</issueManagement>
Continuous?Integration?Management
連續整合管理,基于triggers或者timings
??<ciManagement>
????<system>continuum</system>
????<url>http://127.0.0.1:8080/continuum</url> ;
????<notifiers>
??????<notifier>
????????<type>mail</type>
????????<sendOnError>true</sendOnError>
????????<sendOnFailure>true</sendOnFailure>
????????<sendOnSuccess>false</sendOnSuccess>
????????<sendOnWarning>false</sendOnWarning>
????????<configuration><address>continuum@127.0.0.1</address></configuration>
??????</notifier>
????</notifiers>
??</ciManagement>
Mailing?Lists
??<mailingLists>
????<mailingList>
??????<name>User?List</name>
??????<subscribe>user-subscribe@127.0.0.1</subscribe>
??????<unsubscribe>user-unsubscribe@127.0.0.1</unsubscribe>
??????<post>user@127.0.0.1</post>
??????<archive>http://127.0.0.1/user/</archive> ;
??????<otherArchives>
????????<otherArchive>http://base.google.com/base/1/127.0.0.1</otherArchive> ;
??????</otherArchives>
????</mailingList>
??</mailingLists>
SCM
??軟件配置管理,如cvs?和svn
??<scm>
????<connection>scm:svn:http://127.0.0.1/svn/my-project</connection> ;
????<developerConnection>scm:svn:https://127.0.0.1/svn/my-project</developerConnection> ;
????<tag>HEAD</tag>
????<url>http://127.0.0.1/websvn/my-project</url> ;
??</scm>
Repositories
配置同setting.xml中的開發庫
Plugin?Repositories
配置同?repositories
Distribution?Management
用于配置分發管理,配置相應的產品發布信息,主要用于發布,在執行mvn?deploy后表示要發布的位置
1?配置到文件系統
<distributionManagement>
<repository>
<id>proficio-repository</id>
<name>Proficio?Repository</name>
<url>file://${basedir}/target/deploy</url>
</repository>
</distributionManagement>
2?使用ssh2配置
<distributionManagement>
<repository>
<id>proficio-repository</id>
<name>Proficio?Repository</name>
<url>scp://sshserver.yourcompany.com/deploy</url>
</repository>
</distributionManagement>
3?使用sftp配置
<distributionManagement>
<repository>
<id>proficio-repository</id>
<name>Proficio?Repository</name>
<url>sftp://ftpserver.yourcompany.com/deploy</url>
</repository>
</distributionManagement>
4?使用外在的ssh配置
????編譯擴展用于指定使用wagon外在ssh提供,用于提供你的文件到相應的遠程服務器。
<distributionManagement>
<repository>
<id>proficio-repository</id>
<name>Proficio?Repository</name>
<url>scpexe://sshserver.yourcompany.com/deploy</url>
</repository>
</distributionManagement>
<build>
<extensions>
<extension>
<groupId>org.apache.maven.wagon</groupId>
<artifactId>wagon-ssh-external</artifactId>
<version>1.0-alpha-6</version>
</extension>
</extensions>
</build>
5?使用ftp配置
<distributionManagement>
<repository>
<id>proficio-repository</id>
<name>Proficio?Repository</name>
<url>ftp://ftpserver.yourcompany.com/deploy</url>
</repository>
</distributionManagement>
<build>
<extensions>
<extension>
<groupId>org.apache.maven.wagon</groupId>
<artifactId>wagon-ftp</artifactId>
<version>1.0-alpha-6</version>
</extension>
</extensions>
</build>
repository?對應于你的開發庫,用戶信息通過settings.xml中的server取得
Profiles
類似于settings.xml中的profiles,增加了幾個元素,如下的樣式:
??<profiles>
????<profile>
??????<id>test</id>
??????<activation>...</activation>
??????<build>...</build>
??????<modules>...</modules>
??????<repositories>...</repositories>
??????<pluginRepositories>...</pluginRepositories>
??????<dependencies>...</dependencies>
??????<reporting>...</reporting>
??????<dependencyManagement>...</dependencyManagement>
??????<distributionManagement>...</distributionManagement>
????</profile>
??</profiles>