maven pom

pom:project object model即项目对象模型，是maven项目的核心配置文件pom.xml。它主要描述了项目配置文件，项目依赖包管理和项目打包工具等核心，还包括项目缺陷管理，url等。

pom structrue:

<project>

 <!--core module-->

 <modelVersion>4.0.0</modelVersion> (maven2.0版本)

 <groupId>com.citi.muni</groupId> (the key of the project, resulting in the path of the relativation)

 <artifactId>jbpm-app</artifactId> (the general name the project)

 <version>0.0.1</version> (version indication)

 ---the three features above contribute the single justification that you present to others, as well you would get a specific jar dependency like the style.

 <packaging>jar/war/...</packaging> (point out the output format model)

 <dependencies>

 <dependency>

  <groupId>com.citi.muni</groupId> (the key of the project, resulting in the path of the relativation)

  <artifactId>jbpm-app</artifactId> (the general name the project)

  <version>0.0.1</version> (version indication)

  <type>jar</type> (default as jar)

  <scope>test/system</scope> (the scope of the maven dependency of current package)

  <optional>true</optional> (define if the dependency alive in the child project)

 </dependency>

 <dependency>.. </dependency>

 </dependencies> 

 <parent>

  <groupId>com.citi.muni</groupId> (the key of the project, resulting in the path of the relativation)

  <artifactId>jbpm-app</artifactId> (the general name the project)

  <version>0.0.1</version> (version indication)

  <relativePath>../parent</relativePath>  (get the jar from the path rather than reposity)

 </parent>

 <dependencyManagement>.. </dependencyManagement> (management the children's dependency)

 <moules></modules>

 <properties> (define the constant for the using in place)

  <file.encoding>UTF-8<file.encoding> (${file.encording})

 </properties> 

 <!--build structure-->

 <build>

  <defaultGoal> (the same with the commend such as jar:jar/install)

  <directory></directory> (point out the build destination, default as ${basedir}/target)

  <fileName> (the name of the building file, default as ${artifactId}-${version})

 </build>

 <reporting></reporting>

 <!--description info-->

 <name>jbpm project name</name> <describe the presentation, not care>

 <url></url> <display this web site, not care>

 <description></description> <show description/annotation>

 <licenses></licenses>

 <orgainzation></organization>

 <develops><develops>

 <contributors><contributors>

 <!--environment setting-->

 <issueManagement></issueManagement>

 <ciManagement></ciManagement>

 <mailingLists></mailingLists>

 <scm></scm>

 <prerequisites><prerequisites>

 <repositories></repositories>

 <pluginRepositories></repositories>

 <distributionManagement></distributionManagement>

 <profiles></profiles>

</project>