Maven对Java开发者来说是很常见的工具，有了它只需要在pom文件加几行代码就能引入第三方代码。如果想我们自己写的工具类也让别人通过这种方式使用，不妨借助github搭建个免费仓库。
核心原理就是在github上建立一个代码仓库来存储我们发布的jar包，不需要自己买服务器，买域名，这些github都能帮我们实现。
新建仓库
github git clone https://github.com/acupt/repository.git
Cloning into 'repository'...
remote: Counting objects: 3, done.
remote: Total 3 (delta 0), reused 0 (delta 0), pack-reused 0
Unpacking objects: 100% (3/3), done.
github cd repository
repository git:(master) ls
README.md
repository git:(master) pwd
/Users/acupt/github/repository
发布到本地
mvn deploy -DaltDeploymentRepository=acupt-repository::default::file:/Users/acupt/github/repository/
同步到远程仓库
git branch snapshot
git push origin snapshot
git checkout snapshot
repository git:(snapshot) git add com/
repository git:(snapshot) git commit -m "acupsession"
[snapshot 4409029] acupsession
12 files changed, 74 insertions(+)
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/acupsession-1.0-20180519.110225-1.jar
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/acupsession-1.0-20180519.110225-1.jar.md5
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/acupsession-1.0-20180519.110225-1.jar.sha1
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/acupsession-1.0-20180519.110225-1.pom
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/acupsession-1.0-20180519.110225-1.pom.md5
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/acupsession-1.0-20180519.110225-1.pom.sha1
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/maven-metadata.xml
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/maven-metadata.xml.md5
create mode 100644 com/acupt/acupsession/1.0-SNAPSHOT/maven-metadata.xml.sha1
create mode 100644 com/acupt/acupsession/maven-metadata.xml
create mode 100644 com/acupt/acupsession/maven-metadata.xml.md5
create mode 100644 com/acupt/acupsession/maven-metadata.xml.sha1
repository git:(snapshot) git push
Counting objects: 18, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (8/8), done.
Writing objects: 100% (18/18), 12.50 KiB | 6.25 MiB/s, done.
Total 18 (delta 1), reused 0 (delta 0)
remote: Resolving deltas: 100% (1/1), done.
To https://github.com/acupt/repository.git
3951922..4409029 snapshot -> snapshot
repository git:(snapshot)
测试
到这里已经ok了，通过GitHub提供的域名可以下载maven依赖（但无法查看列表），地址：
https://raw.github.com/acupt/repository/snapshot
接下来新建一个项目试着引用前面发布的jar包，需要在pom文件中增加远程仓库地址，当然也可以在maven配置文件中做全局配置。
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.acupt</groupId>
<artifactId>acupdemo</artifactId>
<version>1.0-SNAPSHOT</version>
<repositories>
<repository>
<id>acupt-repository</id>
<url>https://raw.github.com/acupt/repository/snapshot</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>com.acupt</groupId>
<artifactId>acupsession</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
acupsession cd ~/.m2/repository/com/acupt/acupsession/1.0-SNAPSHOT
1.0-SNAPSHOT ls
acupsession-1.0-20180519.110225-1.jar acupsession-1.0-SNAPSHOT.jar
acupsession-1.0-20180519.110225-1.jar.sha1 acupsession-1.0-SNAPSHOT.pom
acupsession-1.0-20180519.110225-1.jar.tmp.sha1.tmp maven-metadata-acupt-repository.xml
acupsession-1.0-20180519.110225-1.pom maven-metadata-acupt-repository.xml.sha1
acupsession-1.0-20180519.110225-1.pom.sha1 maven-metadata-acupt-repository.xml.tmp.sha1.tmp
acupsession-1.0-20180519.110225-1.pom.tmp.sha1.tmp maven-metadata-snapshots.xml
可以看到已经有jar包了，至此一个属于你自己的maven仓库就完成了。
如果想让别人不需要添加你的仓库地址就能用你的jar包，那么就不能用自己搭建的私人仓库了，需要发布到大家公用的仓库里去，有专门的提供这种服务的公司，网上一搜就有，但不是免费的，告辞。
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