• 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:Reporsitoryorgapachemavenpluginsmaven-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:

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  • 原文地址:https://www.cnblogs.com/seve/p/10982603.html
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