1. Aggregate Engineering Concepts
Set up an empty maven project with only pom files in the project, and set the packaging method of this project to pom.
Add the modules managed in the aggregation project to the aggregation project
2. Aggregation summary
3. Inheritance
For example, the 02 project below inherits the 01 project above. In the pom file of the 02 project, configure the dependency of the parent project to be inherited and add a relative path.
At this point, all the public dependent modules used in 2, 3, and 4 can be placed in the parent project module, which is easy to manage.
In addition to managing the common ones, you can also manage the dependencies used by some modules. For example, manage the Junit dependencies used separately in module 2. Provide corresponding dependencies in the parent project.
Add use in module 2. But do not write the version, it is convenient to manage the version in the parent project.
4. Inheritance summary
