maven 内置变量对应目录

在创建Maven工程后，插件配置中通常会用到一些Maven变量，因此需要找个地方对这些变量进行统一定义，下面介绍如何定义自定义变量。

在根节点project下增加properties节点，所有自定义变量均可以定义在此节点内，如下所示：

<!-- 全局属性配置 -->
<properties>
<project.build.name>tools</project.build.name>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

Maven内置变量说明：
${basedir} 项目根目录
${project.build.directory} 构建目录，缺省为target
${project.build.outputDirectory} 构建过程输出目录，缺省为target/classes
${project.build.finalName} 产出物名称，缺省为${project.artifactId}-${project.version}
${project.packaging} 打包类型，缺省为jar
${project.xxx} 当前pom文件的任意节点的内容

pom中对应元素的值。例如${project.artifactId}对应了<project><artifactId>元素的值，常用的POM属性包括：                                     

${project.build.sourceDirectory}:项目的主源码目录，默认为src/main/java/.                                                                                                         

 ${project.build.testSourceDirectory}:项目的测试源码目录，默认为/src/test/java/.                                                                                             

  ${project.build.directory}:项目构建输出目录，默认为target/.                                                                                                                               

 ${project.build.outputDirectory}:项目主代码编译输出目录，默认为target/classes/.                                                                                             

 ${project.build.testOutputDirectory}:项目测试代码编译输出目录，默认为target/testclasses/.                                                                              

 ${project.groupId}:项目的groupId.                                                                                                                                                                       

 ${project.artifactId}:项目的artifactId.                                                                                                                                                                    

 ${project.version}:项目的version,于${version}等价                                                                                                                                                

${project.build.finalName}:项目打包输出文件的名称，默认为${project.artifactId}${project.version}.