Maven built-in implicit variable (for conversion)

Maven provides three implicit variables for accessing environment variables, pom information, and Maven settings.

Env

The env variable exposes the environment variables of your operating system or shell. For example, a reference to $ {env. Path} In Maven pom will be replaced by the $ {path} environment variable, and % PATH % in windows.

Projetc

The project variable exposes pom. You can use the path of the dot mark (.) to reference the value of the POM element. For example

<Project>
<Modelversion> 4.0.0 </modelversion>
<Groupid> org. sonatype. mavenbook </groupid>
<Artifactid> Project-a </artifactid>
<Version> 1.0-Snapshot </version>
<Packaging> jar </packaging>
<Build>
<Finalname >$ {project. groupid}-$ {project. artifactid} </finalname>
</Build>
</Project>

When you use MVN help: Valid tive-POM to view, you will see <finalname> org. sonatype. mavenbook-project-a </finalname>

 

 

• $ {Basedir} project root directory
• $ {Project. Build. Directory} build directory. The default value is target.
• $ {Project. Build. outputdirectory}: output directory of the build process. The default value is target/classes.
• $ {Project. Build. finalname} Name of the output. The default value is $ {project. artifactid}-$ {project. Version}
• $ {Project. Packaging} packaging type. The default value is jar.
• $ {Project. xxx} contents of any node in the current pom File

   

   

  Settings

  The settings variable exposes the maven settings information. You can use the dot mark (.) path to reference the element value in the settings. xml file. For example, $ {settings. Offline} Will reference ~ The value of the offline element in the/. m2/settings. xml file.