maven项目部署到Repository(Nexus)

本文将以开源的Nexus为例，演示如何将本身开发的项目部署到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服务器上即可。

（二）配置Nexus Repository

1. 打开WEB管理界面：http://localhost:8081/nexus/index.html
2. 点击右上角Log In进行登陆，默认账号：admin、密码：admin123
3. 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。
4. 右键central仓库 -> Update Index，更新远程仓库索引到本地，这一步可以加速本地索引。

   说明：

• 新搭建的neuxs环境只是一个空的仓库，须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，而后再没有仓库的configuration下把Download Remote Indexes修改成true。而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，这一步可以加速本地索引。

• 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便可，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，无论你是hosted也好，proxy也好，或者group也好，对我都是同样的，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可以将多个仓库，hosted或者proxy合并成一个group，这样，Maven只须要依赖于一个group，便能使用全部该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

<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配置帐号密码。注意server的id与repository的id必须对应

<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，成功以下所示

[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