Maven Learning Note 2

1. Maven warehouses and coordinates
   (1) Maven Warehouse:
   
   

   Warehouses and artifacts: Warehouses store artifacts. A component can be a dependency, a plug-in, or a project output.

   
   
   

   Configuring a mirrored warehouse will not access the central repository.
   
   

   The process of looking for artifacts.

   
   

   (2) Maven coordinates
   
   The coordinate definition. These elements are also the defining elements when creating a MAVEN project.
   
   
   Go to the central warehouse to find a dependency, or go to a local project to find coordinates, and then add dependencies (need to first publish the project as a component), all available.

   
   The MAVEN command that publishes the artifact.
   
   The jar package and the Pom file are sent to the local warehouse address.

2. Dependent attributes
   (1) Scope of dependence (scope)
   
   (2) Dependency transfer
   Adding a dependency adds a transitive dependency (an implicit dependency) at the same time.
   (3) Dependency exclusion
   
   Replace unstable components with more robust components, and eliminate old ones and add new ones.
   (4) Conflict-dependent
   
   The first principle path distance, the same distance applies the second principle.
   
   Apply MVN dependency:tree to view the dependency tree so that the dependent path distance can be calculated.
   
   

   
   
   

Maven Learning Note 2