搭建完成后本地仓库缺少的jar包仍从中央仓库直接下载，可能是没有在setting.xml中添加<mirror>

 1.setting.xml

<mirror>  

  <id>nexus</id>   

  <name>internal nexus repository</name>          

  <url>http://localhost:8081/repository/maven-public/</url>        

  <mirrorOf>*</mirrorOf>        

</mirror>


    </server>
      <id>releases</id>
      <username>admin</username>
      <password>admin123</password>
    </server>
    <server>
      <id>snapshots</id>
      <username>admin</username>
      <password>admin123</password>
</server>
<server>
      <id>thirdparty</id>
      <username>admin</username>
      <password>admin123</password>
</server>

<!--nexus3.19.1版本，不添加以下内容也可以正常使用，但不添加mirror不能使用-->
<!--配置私服下载jar包的模板-->
<profile>  
    <!--profile的id-->
    <id>dev</id>  
    <repositories>  
      <repository> 
        <id>nexus</id>  
        <!--仓库地址，即nexus仓库组的地址-->
        <url>http://localhost:8081/repository/maven-public/</url>  
        <!--是否下载releases构件-->
        <releases>  
          <enabled>true</enabled>  
        </releases>  
        <!--是否下载snapshots构件-->
        <snapshots>  
          <enabled>true</enabled>  
        </snapshots>  
      </repository>  
    </repositories> 
     <pluginRepositories> 
        <!-- 插件仓库，maven的运行依赖插件，也需要从私服下载插件 -->
        <pluginRepository> 
            <id>public</id> 
            <name>Public Repositories</name> 
            <url>http://localhost:8081/repository/maven-public/</url> 
        </pluginRepository> 
    </pluginRepositories> 
</profile> 

<!--激活下载模板-->
<activeProfiles>
    <activeProfile>dev</activeProfile>
</activeProfiles>

2.添加到要上传项目的pom中确定上传的路径

<distributionManagement>
    <repository>
      <id>releases</id>
      <url>http://localhost:8081/repository/maven-releases/</url>
    </repository>
    <snapshotRepository>
      <id>snapshots</id>
      <url>http://localhost:8081/repository/maven-snapshots/</url>
    </snapshotRepository>
  </distributionManagement>
<!--不加下面这一段打包上传私服时会报错-->
<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.2.2</version>
            </plugin>
        </plugins>
    </build>