Maven cannot download jar packages in a private library

Two days ago a colleague encountered a problem:

The same project, depending on a jar in the private library, the other colleague's project can be successfully downloaded, but only his project will not be able to download the dependency, and finally found the reason, but still here to note:

1. Maven Dependency Management

MAVEN manages project dependencies through Gav coordinates, and if there is a private library inside the company, the order of dependency lookups is this: local warehouses--and private warehouses--and central warehouses (which is not configured for mirror interception) If mirror is configured in setting and Mirrorof is configured to *,url point to the Private library path, the lookup order is the local warehouse--and the private warehouse (the Central warehouse), which is different for the initiator relying on the central warehouse lookup

2. Maven Dependency Path

Dependent paths refer to the inheritance order of the parent of the project structure, in general, the MAVEN module of the project is only divided into 2 levels, namely:

Maven-project-parent (POM)

---maven-project-api (jar)

---maven-project-core (jar)

---maven-project-web (WAR)

There are, of course, multi-level situations:

Maven-project-parent (POM)

---maven-project-loan-parent (POM)

------MAVEN-PROJECT-LOAN-API (JAR)

------Maven-project-loan-core (JAR)

------Maven-project-loan-web (WAR)

---maven-project-invest-parent (POM)

------MAVEN-PROJECT-INVEST-API (JAR)

------Maven-project-invest-core (JAR)

------Maven-project-invest-web (WAR)

3. Maven download Dependency package sequence

The download order is based on a dependent path, such as a MAVEN-PROJECT-INVEST-API project in a multi-level project if it depends on the DEPENDENCY-PROJECT-API project in the following project:

Dependency-project-parent

---dependency-project-api

---dependency-project-core

---dependency-project-web

However, only the API packages in this project are being deploy to the MAVEN private library, so depending on the download order, the project will first go back to download Dependency-project-api's parent pom---dependency-project-parent, But the private library does not, so there will be dependency-project-api.jar in this private library, but cannot download the jar package problem,

4. Solution:

(1) If the source code, the Dependency-project-parent code directly clone to local, and then install to the local warehouse to resolve the dependency

(2) Re-deploy the dependency-project-parent to the private library

This article is from the "General Programmer to CTO" blog, please be sure to keep this source http://1730634.blog.51cto.com/1720634/1746252

Maven cannot download jar packages in a private library