问题： 多个root pom的dependencyManagement有重复的内容，希望统一管理。
解决：
新建一个空pom.xml，在dependencyManagement中指定这些依赖，如
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>info.sunng</groupId>
<artifactId>root</artifactId>
<packaging>pom</packaging>
<version>0.0.1-SNAPSHOT</version>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>info.sunng</groupId>
<artifactId>X</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
</dependencyManagement>
</project>
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>info.sunng</groupId>
<artifactId>root</artifactId>
<packaging>pom</packaging>
<version>0.0.1-SNAPSHOT</version>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>info.sunng</groupId>
<artifactId>X</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
</dependencies>
</dependencyManagement>
</project>
将这个pom.xml部署到你的Maven私服。
在其他root pom中添加这样的dependencyManagement
....
<dependency>
<groupId>info.sunng</groupId>
<artifactId>root</artifactId>
<version>0.0.1-SNAPSHOT</version>
<type>pom</type>
<scope>import</scope>
</dependency>
....
<dependency>
<groupId>info.sunng</groupId>
<artifactId>root</artifactId>
<version>0.0.1-SNAPSHOT</version>
<type>pom</type>
<scope>import</scope>
</dependency>
....
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