Maven私服搭建(Nexus Repository Manager 3)
下载和安装
下载地址:
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:
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*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
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:
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