Several types of Maven repositories

In the context of Maven, a "repository" refers to a storage location for artifacts such as JAR files, POM files, and other resources needed during the build and deployment processes. There are several types of Maven repositories, and their differences can be summarized as follows:


1. Local Repository

  • Description: A repository located on your local machine where Maven stores all downloaded dependencies.

  • Default Location :

    • ~/.m2/repository (on Linux/Mac)
    • C:\Users\<User>\.m2\repository (on Windows)
  • How It Works :

    • When you build a Maven project, it first looks for dependencies in the local repository.
    • If not found, it downloads from remote repositories and caches them locally.
  • Configuration : Can be customized in the settings.xml file.

    <localRepository>/path/to/local/repo</localRepository>


2. Remote Repository

  • Description: A central location on the internet or an organization's network that hosts Maven artifacts.

  • Examples :

    • Maven Central (https://repo.maven.apache.org/maven2/)
    • JCenter (deprecated)
    • Custom Nexus/Artifactory repositories.
  • Usage :

    • Maven queries remote repositories if the dependency is not found locally.
  • Configuration : Add remote repositories in the pom.xml or settings.xml.

    <repositories> <repository> <id>central</id> <url>https://repo.maven.apache.org/maven2</url> </repository> </repositories>


3. Central Repository

  • Description: The default remote repository used by Maven to download dependencies.
  • URL : https://repo.maven.apache.org/maven2/
  • Characteristics :
    • Publicly accessible.
    • Maintained by the Maven project.
  • No Additional Configuration Required :
    • Maven uses this repository by default unless explicitly overridden.

4. Private/Corporate Repository

  • Description: A repository set up by an organization to host internal or third-party artifacts not available in public repositories.

  • Tools :

    • Nexus Repository Manager
    • JFrog Artifactory
    • AWS CodeArtifact
  • Benefits :

    • Enhanced control over dependencies.
    • Secure and private storage for proprietary code.
  • Configuration :

    <repositories> <repository> <id>corporate-repo</id> <url>https://my.corporate.repo/repository/maven-releases/</url> </repository> </repositories>


5. Snapshot Repository

  • Description : Dedicated to hosting -SNAPSHOT artifacts, which represent development versions of a project.

  • Usage :

    • When a project is under development, frequent updates may occur.
    • SNAPSHOT versions are updated dynamically in the repository.
  • Configuration Example :

    <repositories> <repository> <id>snapshots</id> <url>https://my.corporate.repo/repository/maven-snapshots/</url> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories>


6. Release Repository

  • Description: Hosts stable and released versions of artifacts (non-SNAPSHOT versions).

  • Usage :

    • Used for production-ready artifacts.
    • Once deployed to the release repository, the artifacts are immutable.
  • Configuration Example :

    <repositories> <repository> <id>releases</id> <url>https://my.corporate.repo/repository/maven-releases/</url> <releases> <enabled>true</enabled> </releases> </repository> </repositories>


Key Differences Between Maven Repositories:

Type Location Purpose Example URL
Local Repository Local filesystem Cache dependencies locally for faster builds. ~/.m2/repository
Remote Repository Internet or network server Fetch dependencies not found locally. https://repo.maven.apache.org/maven2/
Central Repository Internet Default repository for Maven. https://repo.maven.apache.org/maven2/
Private Repository Private network Store proprietary or internal artifacts. https://my.corporate.repo/...
Snapshot Repository Internet/Private network Host development artifacts (-SNAPSHOT). https://my.repo.com/maven-snapshots/
Release Repository Internet/Private network Host production-ready, immutable artifacts (non-SNAPSHOT). https://my.repo.com/maven-releases/
相关推荐
界面开发小八哥2 小时前
「Java EE开发指南」如何用MyEclipse创建一个WEB项目?(三)
java·ide·java-ee·myeclipse
idolyXyz2 小时前
[java: Cleaner]-一文述之
java
一碗谦谦粉2 小时前
Maven 依赖调解的两大原则
java·maven
netyeaxi3 小时前
Java:使用spring-boot + mybatis如何打印SQL日志?
java·spring·mybatis
收破烂的小熊猫~3 小时前
《Java修仙传:从凡胎到码帝》第四章:设计模式破万法
java·开发语言·设计模式
猴哥源码3 小时前
基于Java+SpringBoot的动物领养平台
java·spring boot
老任与码3 小时前
Spring AI Alibaba(1)——基本使用
java·人工智能·后端·springaialibaba
小兵张健3 小时前
武汉拿下 23k offer 经历
java·面试·ai编程
FreeBuf_3 小时前
Apache组件遭大规模攻击:Tomcat与Camel高危RCE漏洞引发数千次利用尝试
java·tomcat·apache
无妄-20243 小时前
软件架构升级中的“隐形地雷”:版本选型与依赖链风险
java·服务器·网络·经验分享