应用场景：projectA 依赖projectB, projectB 依赖projectC时

projectA中pom.xml<groupId>com.cn.projectA</groupId><artifactId>projectA</artifactId><version>1.0-SNAPSHOT</version><dependencies> <dependency> <groupId>com.cn.projectB</groupId> <artifactId>projectB</artifactId> <version>1.0B</version> <!--方案一：使用execusions排除A与C的依赖 --> <exclusions> <exclusion> <groupId>com.cn.projectC</groupId> <artifactId>projectC</artifactId> </exclusion> </exclusions> </dependency></dependencies>projectB中的pom.xml<groupId>com.cn.projectB</groupId> <artifactId>projectB</artifactId> <version>1.0B</version> <dependencies> <dependency> <groupId>com.cn.projectC</groupId> <artifactId>projectC</artifactId> <version>1.0C</version> <!--依赖传递选项，默认为false为依赖，ture为不依赖传递 方案二：通过optional设置自动或手动,排除A与C的依赖 --> <optional>false</optional> </dependency> </dependencies> projectC的pom.xml <groupId>com.cn.projectC</groupId> <artifactId>projectC</artifactId> <version>1.0C</version>