当多模块之间的依赖版本不一致时，可以采取以下几种解决方法：
统一版本：在父模块的pom.xml文件中定义一个版本属性，然后在子模块的依赖中引用该属性。这样可以保证所有子模块使用相同的版本。<properties> <dependency.version>1.0.0</dependency.version></properties><dependencies> <dependency> <groupId>com.example</groupId> <artifactId>example-artifact</artifactId> <version>${dependency.version}</version> </dependency></dependencies><dependency> <groupId>com.example</groupId> <artifactId>example-artifact</artifactId> <version>1.0.0</version> <exclusions> <exclusion> <groupId>com.example</groupId> <artifactId>example-artifact</artifactId> </exclusion> </exclusions></dependency><dependency> <groupId>com.example</groupId> <artifactId>example-artifact</artifactId> <version>2.0.0</version></dependency><dependencyManagement> <dependencies> <dependency> <groupId>com.example</groupId> <artifactId>example-artifact</artifactId> <version>1.0.0</version> </dependency> <dependency> <groupId>com.example</groupId> <artifactId>another-artifact</artifactId> <version>2.0.0</version> </dependency> </dependencies></dependencyManagement><dependencies> <dependency> <groupId>com.example</groupId> <artifactId>example-artifact</artifactId> </dependency> <dependency> <groupId>com.example</groupId> <artifactId>another-artifact</artifactId> </dependency></dependencies>以上是解决Maven多模块依赖版本不一致问题的几种常用方法，根据具体情况选择适合的方法进行处理。
