本文将以开源的Nexus为例，演示如何将自己开发的项目部署到Nexus Repository中，解决项目发布、升级的问题。
（一）下载并安装Nexus
Nexus只需下载war包放到tomcat服务器上便可。
（二）配置Nexus Repository
- 打开WEB管理界面：http://localhost:8081/nexus/index.html
- 点击右上角Log In进行登录，默认帐号：admin、密码：admin123
- 点击左侧Repositories项 -> central仓库 -> Configuration -> Download Remote Indexes=True -> Save，表示下载远程仓库的索引。
- 右键central仓库 -> Update Index，更新远程仓库索引到本地，这一步能够加速本地索引。
说明：
- 新搭建的neuxs环境只是一个空的仓库， 需要手动和远程中心库进行同步，nexus默认是关闭远程索引下载，最重要的一件事情就是开启远程索引下载。 找到右边仓库列表中的三个仓库Apache Snapshots，Codehaus Snapshots和Maven Central，然后再没有仓库的configuration下把Download Remote Indexes修改为true。然后在这三个仓库上分别右键，选择Repari Index，这样Nexus就会去下载远程的索引文件。右键仓库 -> Update Index，更新远程仓库索引到本地，这一步能够加速本地索引。
- 新建公司的内部仓库，步骤为 Repositories –> Add –> Hosted Repository，在页面的下半部分输入框中填入Repository ID和Repository Name即可，另外把Deployment Policy设置为Allow Redeploy
- Nexus中仓库组的概念是Maven没有 的，在Maven看来，不管你是hosted也好，proxy也好，或者group也好，对我都是一样的，我只管根据 groupId，artifactId，version等信息向你要构件。为了方便Maven的配置，Nexus能够将多个仓库，hosted或者 proxy合并成一个group，这样，Maven只需要依赖于一个group，便能使用所有该group包含的仓库的内容。
（三）在项目中配置Nexus Repository的信息
- 项目pom文件配置distributionManagement
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<distributionManagement> <repository> <id>releases</id> <name>Nexus Release Repository</name> <url>http://localhost:8081/nexus/content/repositories/releases/</url> </repository> <snapshotRepository> <id>snapshots</id> <name>Nexus Snapshot Repository</name> <url>http://localhost:8081/nexus/content/repositories/snapshots/</url> </snapshotRepository></distributionManagement> |
- settings.xml配置账号密码。注意server的id与repository的id必须对应
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<servers> <server> <id>releases</id> <username>admin</username> <password>admin123</password> </server> <server> <id>snapshots</id> <username>admin</username> <password>admin123</password> </server></servers> |
（四）发布到Nexus Repository
- 项目中执行mvn deploy，成功如下所示
[INFO] --- maven-deploy-plugin:2.7:deploy (default-deploy) @ tenpay ---
Uploading: http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/1.2/tenpay-1.2.jar
Uploading: http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/1.2/tenpay-1.2.pom
Uploaded: http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/1.2/tenpay-1.2.pom (2 KB at 9.7 KB/sec)
Uploaded:
http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/1.2/tenpay-1.2.jar
(39 KB at 124.4 KB/sec)
Downloading: http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/maven-metadata.xml
Downloaded:
http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/maven-metadata.xml
(347 B at 4.3 KB/sec)
Uploading: http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/maven-metadata.xml
Uploaded: http://localhost:8081/nexus/content/repositories/releases/com/capital/tenpay/maven-metadata.xml (376 B at 7.8 KB/sec)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
