What is the difference between artifactId and groupId in pom.xml?

问题

How would you explain it to a newbie web developer or programmer with some real world organization example (like say facebook company or Google company)?

回答1:

From maven.apache.org, Naming Conventions:

artifactId is the name of the jar without version. If you created it then you can choose whatever name you want with lowercase letters and no strange symbols. If it's a third party jar you have to take the name of the jar as it's distributed. eg. maven, commons-math

groupId will identify your project uniquely across all projects, so we need to enforce a naming schema. It has to follow the package name rules, what means that has to be at least as a domain name you control, and you can create as many subgroups as you want. Look at More information about package names. eg. org.apache.maven, org.apache.commons

回答2:

The main difference between groupId and artifactId in Maven is that the groupId specifies the id of the project group while the artifactId specifies the id of the project.

It is required to use third party libraries when developing a project. The programmer can download and add these third-party libraries to the project, but it is difficult to update them later. Maven provides a solution to this issue. It helps to include all the dependencies required for the project. Moreover, the programmer can specify the required dependencies in the POM.XML file. It has the configuration information to build the project. Furthermore, this file consists of several XML elements, and two of them are groupId and artifactId. example groupId : com.test.java (similar to package name) artifactId : javaproject(project or module name)

来源：https://stackoverflow.com/questions/39185798/what-is-the-difference-between-artifactid-and-groupid-in-pom-xml