我正在研究一个具有模块间依赖性的多模块Maven项目。例如：项目的一个模块，例如spark-module依赖于同一项目的另一个模块（例如core-module）。
core-module依赖于jackson-datatype-jsr310:2.8.11，在spark-module中，我从Apache Spark项目添加了测试罐-spark-sql_2.11:2.4.0，{{1} }，spark-core_2.11:2.4.0用于单元测试。如您所见，这些Spark模块都是2.4.0版，它们内部使用spark-catalyst_2.11:2.4.0。请参考下面提供的POM：
父母
jackson-databind:2.6.7.1核心模块
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.sample</groupId>
<artifactId>spark-test</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>core-module</module>
<module>spark-module</module>
</modules>
</project>
火花模块
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>spark-test</artifactId>
<groupId>com.sample</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>core-module</artifactId>
<dependencies>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.8.11</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>src/test/resources</directory>
<filtering>true</filtering>
</testResource>
</testResources>
</build>
</project>
现在，当我构建<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>spark-test</artifactId>
<groupId>com.sample</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>spark-module</artifactId>
<dependencies>
<dependency>
<groupId>com.sample</groupId>
<artifactId>core-module</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>2.4.0</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.javassist</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.4.0</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.javassist</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-hive_2.11</artifactId>
<version>2.4.0</version>
<scope>provided</scope>
</dependency>
<!-- Test dependencies -->
<dependency>
<groupId>org.scalatest</groupId>
<artifactId>scalatest_2.11</artifactId>
<version>3.0.6</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.holdenkarau</groupId>
<artifactId>spark-testing-base_2.11</artifactId>
<version>2.4.0_0.12.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>2.4.0</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>2.4.0</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-catalyst_2.11</artifactId>
<version>2.4.0</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>3.2.2</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.scalatest</groupId>
<artifactId>scalatest-maven-plugin</artifactId>
<version>2.0.0</version>
<configuration>
<reportsDirectory>${project.build.directory}/surefire-reports</reportsDirectory>
<junitxml>.</junitxml>
<filereports>WDF TestSuite.txt</filereports>
</configuration>
<executions>
<execution>
<id>test</id>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
<exclude>org.apache.spark:*</exclude>
</excludes>
</artifactSet>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
时，当maven shade插件启动时，它包含spark-module而不是2.8.11（我认为它来自jackson-databind:2.6.7.1）。当我将以下排除项添加到core-module依赖项时，它会正确捆绑2.8.11版本的JAR，但这会使我的测试失败，因为排除了依赖项：
test-jar也许我在处理依赖项的方式上做错了。所以，请您帮我了解在这里应该做什么？
答案 0 :(得分：2)
要控制jackson-databind的版本，请在<dependencyManagement>部分中添加一个条目，您可以在其中指定所需的版本。这将覆盖所有传递定义，并且比各种排除方法更容易处理。
因此，在第一步中，您可以尝试将其设置为<version>2.8.11</version>并尝试测试是否可行。如果不是，那么您需要找出一个既适用于core-module中的应用程序又适用于您的测试的“中间版本”。