maven不能下载中央库jar问题的解决

Love The Way You Lie 2024-02-18 17:00 45阅读 0赞

使用Maven搭建开发环境时，提示：\[INFO\] Scanning for projects...  
Downloading: [http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.4.1/maven-clean-plugin-2.4.1.pom][http_repo1.maven.org_maven2_org_apache_maven_plugins_maven-clean-plugin_2.4.1_maven-clean-plugin-2.4.1.pom]  
\[WARNING\] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-clean-plugin:2.4.1: Plugin org.apache.maven.plugins:maven-clean-plugin:2.4.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1

Downloading: [http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-install-plugin/2.3.1/maven-install-plugin-2.3.1.pom][http_repo1.maven.org_maven2_org_apache_maven_plugins_maven-install-plugin_2.3.1_maven-install-plugin-2.3.1.pom]

原因是从国外[http://repo1.maven.org][http_repo1.maven.org_maven2_org_apache_maven_plugins_maven-install-plugin_2.3.1_maven-install-plugin-2.3.1.pom]下载库速度很慢所致，我的做法是，找到Maven安装目录里的配置文件conf，打开settings.xml文件，maven默认把jar下载到C盘：用户/用户名文件夹/.m2/repository，把jar下载到系统盘是一个很不安全的做法，所以我修改conf里的setting.xml文件，将jar存放到指定的目录，<localRepository>D:\\maven\\mavenJars\\repository</localRepository>。这里需要注意的是，要把默认存放目录那部分注释去掉，否则这样的修改将不会生效，到时maven还会把jars下载到C盘的m2文件夹里的，不要以为注释掉就没有影响。

其次，指定maven下载jar的来源地，在settings.xml文件中找到mirrors节点，删掉默认的下载路径：

然后添加上以下内容

<mirror>  
<id>alimaven</id>  
<name>aliyun maven</name>  
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>  
<mirrorOf>central</mirrorOf>  
</mirror>  
<mirror>  
  
<id>nexus</id>  
<mirrorOf>\*</mirrorOf>  
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>  
</mirror>  
<mirror>  
<id>ibiblio.org</id>  
<name>ibiblio Mirror of http://repo1.maven.org/maven2/</name>  
<url>http://mirrors.ibiblio.org/pub/mirrors/maven2</url>  
<mirrorOf>central</mirrorOf>  
</mirror>

保存，再重新建maven项目就正常了

[http_repo1.maven.org_maven2_org_apache_maven_plugins_maven-clean-plugin_2.4.1_maven-clean-plugin-2.4.1.pom]: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.4.1/maven-clean-plugin-2.4.1.pom
[http_repo1.maven.org_maven2_org_apache_maven_plugins_maven-install-plugin_2.3.1_maven-install-plugin-2.3.1.pom]: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-install-plugin/2.3.1/maven-install-plugin-2.3.1.pom