Maven私服搭建(Nexus Repository Manager 3)

下载和安装

下载地址：https://help.sonatype.com/repomanager3/download

注意：Nexus Repository Manager 3是一个Java服务器应用程序，安装需要 jdk1.8以上的版本。

下载解压后，用命令行到解压目录的bin目录下运行 nexus.exe /run（Linux运行./nexus run），启动完成后会显示“Started Sonatype Nexus”：

-------------------------------------------------Started Sonatype Nexus OSS 3.16.2-01-------------------------------------------------

访问Nexus管理后台

Nexus管理后台地址：http://localhost:8081/
点击右上角Sign in登录，默认账号和密码为：admin/admin123

在Repositories 仓库管理界面中有多种默认的仓库，也可以添加新的仓库，本实例直接使用默认的仓库：
maven-central，Type为proxy，表示代理仓库。代理仓库用来代理远程仓库（maven-central代理的是超级POM中配置的Maven中央仓库），当在下载组件时，如果代理仓库搜索不到，则会把请求转发到远程仓库从远程仓库下载。从远程仓库下载后会缓存到代理仓库，下次还有该组件的请求则会直接到代理仓库下载，不会再次请求远程仓库。

maven-releases/maven-snapshots，Type为hosted，表示为宿主仓库。宿主仓库主要用来部署团队内部使用的内部组件，默认的maven-releases和maven-snapshots分别用来部署团队内部的发布版本组件和快照版本组件。

配置代理仓库

配置settings.xml：

<settings><!-- 配置镜像，此处拦截所有远程仓库的请求到代理仓库--><mirrors><mirror><id>nexus</id><mirrorOf>*</mirrorOf><url>http://localhost:8081/repository/maven-central/</url></mirror></mirrors><!-- 配置远程库和远程插件库--><profiles><profile><id>nexus</id><!-- Maven用于填充构建系统本地存储库的远程仓库集合--><repositories><repository><id>central</id><url>http://central</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled></snapshots></repository></repositories><!-- 类似于repositories元素，指定Maven可以在哪里找到Maven插件的远程仓库位置--><pluginRepositories><pluginRepository><id>central</id><url>http://central</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled></snapshots></pluginRepository></pluginRepositories></profile></profiles><!-- 激活profiles配置 --><activeProfiles><activeProfile>nexus</activeProfile></activeProfiles>
</settings>

创建Maven项目，pom.xml如下：

<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.nocoffee</groupId><artifactId>coffee-api</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>coffee-api</name><url>http://maven.apache.org</url><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.1</version><scope>test</scope></dependency></dependencies>
</project>

执行mvn clean，执行mvn clean需要下载maven-clean-plugin插件，通过Browse界面可以看到因为执行mvn clean而下载的maven-clean-plugin.jar：

注意：如果界面为空，表示没有下载，原因是之前下载过该插件到本地仓库，需要把本地仓库的maven-clean-plugin插件删除，我的本地仓库路径为D:\Reporsitory，所以需要删掉文件夹：D:\Reporsitory\org\apache\maven\plugins\maven-clean-plugin，然后重新构建即可。

配置宿主仓库

settings.xml增加如下配置：

<servers><server><id>nexus</id><username>admin</username><password>admin123</password></server>
</servers>

配置pom.xml：

<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.nocoffee</groupId><artifactId>coffee-api</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>coffee-api</name><url>http://maven.apache.org</url><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.1</version><scope>test</scope></dependency></dependencies><distributionManagement><repository><id>nexus</id><name>maven-releases</name><url>http://localhost:8081/repository/maven-releases/</url></repository><snapshotRepository><id>nexus</id><name>maven-snapshots</name><url>http://localhost:8081/repository/maven-snapshots/</url></snapshotRepository></distributionManagement>
</project>

执行mvn clean deploy将项目打包并发布到宿主仓库，构建成功后到Browse中maven-snapshots库查看（因为项目版本为0.0.1-SNAPSHOT，是带SNAPSHOT的快照版本）：

maven-releases库

需要将项目版本改成发布版本，在pom.xml中0.0.1-SNAPSHOT去掉-SNAPSHOT，改为0.0.1。重新执行mvn clean deploy：

注意：maven-releases库默认不能重新发布，需要可重新发布则需要修改该仓库配置。
测试重新发布到maven-releases库，执行mvn clean deploy将会构建失败：

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.112 s
[INFO] Finished at: 2019-06-10T16:34:29+08:00
[INFO] Final Memory: 18M/164M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin:2.7:deploy (default-deploy) on project coffee-api: Failed to deploy artifacts: Could not transfer artifact com.nocoffee:coffee-api:jar:0.0.1 from/to nexus (http://localhost:8081/repository/maven-releases/): Failed to transfer file: http://localhost:8081/repository/maven-releases/com/nocoffee/coffee-api/0.0.1/coffee-api-0.0.1.jar. Return code is: 400, ReasonPhrase: Repository does not allow updating assets: maven-releases. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

将maven-releases库中Deployment pollcy改为Allow redeploy既可：

原文链接 https://www.cnblogs.com/seve/p/10982603.html

转载于:https://www.cnblogs.com/mzdljgz/p/11601588.html