Maven插件依赖包拉取失败

报错

Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.5:help (default-cli) on project student-ouyk: Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.5:help failed: Plugin org.mybatis.generator:mybatis-generator-maven-plugin:1.3.5 or one of its dependencies could not be resolved: com.xxx.yyy.mybatis.generator.plugins:xxx-generator-plugins:jar:1.0.0.0 was not found in http://maven.aliyun.com/nexus/content/groups/public during a previous attempt. This failure was cached in the local repository and resolution is not reattempted until the update interval of nexus-aliyun has elapsed or updates are forced

Pom.xml

           <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.35</version>
                        <scope>runtime</scope>
                    </dependency>
                    <dependency>
                        <groupId>com.xxx.yyy.mybatis.generator.plugins</groupId>
                        <artifactId>gexin-generator-plugins</artifactId>
                        <version>1.0.0.0</version>
                    </dependency>
                </dependencies>
            </plugin>

setting.xml

  <profiles>
    <profile>
      <id>dev</id>
      <repositories>
          <repository>
              <id>local-nexus</id>
              <url>http://192.168.10.49:8081/nexus/content/groups/public</url>
              <releases>
                  <enabled>true</enabled>
              </releases>
              <snapshots>
                  <enabled>true</enabled>
              </snapshots>
          </repository>
      </repositories>
    </profile>
  </profiles>
  <mirrors>
    <mirror>
      <id>nexus-aliyun</id>
      <mirrorOf>central</mirrorOf>
      <name>Nexus aliyun</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public</url>
    </mirror>
  </mirrors>

com.xxx.yyy.mybatis.generator.plugins:xxx-generator-plugins:jar:1.0.0.0 是maven私服里的依赖包。
因为配置了私服以及阿里云仓库，根据报错可知，每次都从阿里云仓库拉取依赖。尝试将无法拉取的依赖加到<dependencies>标签内，发现可以成功拉取。

经过查找资料，发现插件内的依赖不会从setting文件配置的profile-repositories-url指定的仓库拉取，而是会从pluginRepositories中拉取，因为setting文件没有配置pluginRepositories，所以默认从阿里云仓库拉取，自然是拉不到的。

解决方法

在setting.xml 的 profile里新增pluginRepositories，将会从阿里云仓库和配置的私服拉取插件

<profiles>
    <profile>
      <id>dev</id>
      <repositories>
          <repository>
              <id>local-nexus</id>
              <url>http://192.168.10.49:8081/nexus/content/groups/public</url>
              <releases>
                  <enabled>true</enabled>
              </releases>
              <snapshots>
                  <enabled>true</enabled>
              </snapshots>
          </repository>
      </repositories>
      <pluginRepositories>
          <pluginRepository>
              <id>local-nexus</id>
              <url>http://192.168.10.49:8081/nexus/content/groups/public</url>
              <releases>
                  <enabled>true</enabled>
              </releases>
              <snapshots>
                  <enabled>true</enabled>
              </snapshots>
          </pluginRepository>
      </pluginRepositories>
    </profile>
  </profiles>