Maven私服搭建(Nexus Repository Manager 3)

時間 2019-12-13

標籤 maven 搭建 nexus repository manager 欄目 Maven 简体版

原文原文鏈接

下載和安裝

下載地址：https://help.sonatype.com/repomanager3/downloadapache

注意：Nexus Repository Manager 3是一個Java服務器應用程序，安裝須要 jdk1.8以上的版本。api

下載解壓後，用命令行到解壓目錄的bin目錄下運行 nexus.exe /run（Linux運行./nexus run），啓動完成後會顯示「Started Sonatype Nexus」：緩存

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Started Sonatype Nexus OSS 3.16.2-01

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訪問Nexus管理後臺

Nexus管理後臺地址：http://localhost:8081/
點擊右上角Sign in登陸，默認帳號和密碼爲：admin/admin123
服務器

在Repositories 倉庫管理界面中有多種默認的倉庫，也能夠添加新的倉庫，本實例直接使用默認的倉庫：
maven-central，Type爲proxy，表示代理倉庫。代理倉庫用來代理遠程倉庫（maven-central代理的是超級POM中配置的Maven中央倉庫），當在下載組件時，若是代理倉庫搜索不到，則會把請求轉發到遠程倉庫從遠程倉庫下載。從遠程倉庫下載後會緩存到代理倉庫，下次還有該組件的請求則會直接到代理倉庫下載，不會再次請求遠程倉庫。併發

maven-releases/maven-snapshots，Type爲hosted，表示爲宿主倉庫。宿主倉庫主要用來部署團隊內部使用的內部組件，默認的maven-releases和maven-snapshots分別用來部署團隊內部的發佈版本組件和快照版本組件。
maven

配置代理倉庫

配置settings.xml：測試

<settings>
   <!-- 配置鏡像，此處攔截全部遠程倉庫的請求到代理倉庫-->
  <mirrors>
    <mirror>
      <id>nexus</id>
      <mirrorOf>*</mirrorOf>
      <url>http://localhost:8081/repository/maven-central/</url>
    </mirror>
  </mirrors>
  <!-- 配置遠程庫和遠程插件庫-->
  <profiles>
    <profile>
      <id>nexus</id>
      <!-- Maven用於填充構建系統本地存儲庫的遠程倉庫集合-->
      <repositories>
        <repository>
          <id>central</id>
          <url>http://central</url>
          <releases><enabled>true</enabled></releases>
          <snapshots><enabled>true</enabled></snapshots>
        </repository>
      </repositories>
     <!-- 相似於repositories元素，指定Maven能夠在哪裏找到Maven插件的遠程倉庫位置-->
     <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>

建立Maven項目，pom.xml以下：url

<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>

執行mvn clean，執行mvn clean須要下載maven-clean-plugin插件，經過Browse界面能夠看到由於執行mvn clean而下載的maven-clean-plugin.jar：
插件

注意：若是界面爲空，表示沒有下載，緣由是以前下載過該插件到本地倉庫，須要把本地倉庫的maven-clean-plugin插件刪除，個人本地倉庫路徑爲D:\Reporsitory，因此須要刪掉文件夾：D:\Reporsitory\org\apache\maven\plugins\maven-clean-plugin，而後從新構建便可。命令行

配置宿主倉庫

settings.xml增長以下配置：

<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>

執行mvn clean deploy將項目打包併發布到宿主倉庫，構建成功後到Browse中maven-snapshots庫查看（由於項目版本爲0.0.1-SNAPSHOT，是帶SNAPSHOT的快照版本）：

maven-releases庫

須要將項目版本改爲發佈版本，在pom.xml中 0.0.1-SNAPSHOT 去掉-SNAPSHOT，改成 0.0.1 。從新執行mvn clean deploy：

注意：maven-releases庫默認不能從新發布，須要可從新發布則須要修改該倉庫配置。
測試從新發布到maven-releases庫，執行mvn clean deploy將會構建失敗：

[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

將maven-releases庫中Deployment pollcy改成Allow redeploy既可：