我正在使用WSO2微集成器开发一个POC，我创建了一个多专家项目，其中包含EBS工件、复合应用程序、注册表和Kubernetes Exporter。当我正在使用父multihavenpom构建项目时，我得到了以下错误：
[INFO] Building EmployeeInfo 1.0.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ EmployeeInfo ---
[INFO] Deleting /Users/ishantgarg/IntegrationStudio/deployment_workspace/POC_EmployeeInfo/EmployeeInfo/target/capp
[INFO]
[INFO] --- wso2-esb-api-plugin:2.1.0:pom-gen (api) @ EmployeeInfo ---
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] POC_EmployeeInfo ................................... SUCCESS [ 0.682 s]
[INFO] EmployeeInfo ....................................... FAILURE [ 0.091 s]
[INFO] EmployeeInfoRegistry ............................... SKIPPED
[INFO] EmployeeInfoCompositeApplication ................... SKIPPED
[INFO] EmployeeInfoKubernetsExporter ...................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:37 min
[INFO] Finished at: 2020-04-29T10:11:25+02:00
[INFO] Final Memory: 27M/93M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.wso2.maven:wso2-esb-api-plugin:2.1.0:pom-gen (api) on project EmployeeInfo: Execution api of goal org.wso2.maven:wso2-esb-api-plugin:2.1.0:pom-gen failed: A required class was missing while executing org.wso2.maven:wso2-esb-api-plugin:2.1.0:pom-gen: javax/activation/DataSource
[ERROR] -----------------------------------------------------
[ERROR] realm = extension>org.wso2.maven:wso2-esb-api-plugin:2.1.0
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/Users/ishantgarg/.m2/repository/org/wso2/maven/wso2-esb-api-plugin/2.1.0/wso2-esb-api-plugin-2.1.0.jar
[ERROR] urls[1] = file:/Users/ishantgarg/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.11/plexus-interpolation-1.11.jar
[ERROR] urls[2] = file:/Users/ishantgarg/.m2/repository/org/codehaus/plexus/plexus-component-annotations/1.5.4/plexus-component-annotations-1.5.4.jar
[ERROR] urls[3] = file:/Users/ishantgarg/.m2/repository/org/sonatype/sisu/sisu-inject-bean/1.4.2/sisu-inject-bean-1.4.2.jar
[ERROR] urls[4] = file:/Users/ishantgarg/.m2/repository/org/sonatype/sisu/sisu-guice/2.1.7/sisu-guice-2.1.7-noaop.jar
[ERROR] urls[5] = file:/Users/ishantgarg/.m2/repository/org/apache/maven/maven-archiver/2.2/maven-archiver-2.2.jar
[ERROR] urls[6] = file:/Users/ishantgarg/.m2/repository/org/apache/maven/shared/maven-dependency-tree/1.2/maven-dependency-tree-1.2.jar
[ERROR] urls[7] = file:/Users/ishantgarg/.m2/repository/org/apache/xbean/xbean-reflect/3.4/xbean-reflect-3.4.jar
[ERROR] urls[8] = file:/Users/ishantgarg/.m2/repository/log4j/log4j/1.2.14/log4j-1.2.14.jar
[ERROR] urls[9] = file:/Users/ishantgarg/.m2/repository/commons-logging/commons-logging-api/1.1/commons-logging-api-1.1.jar
[ERROR] urls[10] = file:/Users/ishantgarg/.m2/repository/com/google/collections/google-collections/1.0/google-collections-1.0.jar
[ERROR] urls[11] = file:/Users/ishantgarg/.m2/repository/org/codehaus/plexus/plexus-archiver/1.0-alpha-7/plexus-archiver-1.0-alpha-7.jar
[ERROR] urls[12] = file:/Users/ishantgarg/.m2/repository/org/codehaus/plexus/plexus-utils/2.0.1/plexus-utils-2.0.1.jar
[ERROR] urls[13] = file:/Users/ishantgarg/.m2/repository/org/wso2/maven/org.wso2.maven.capp/2.1.0/org.wso2.maven.capp-2.1.0.jar
[ERROR] urls[14] = file:/Users/ishantgarg/.m2/repository/org/apache/ws/commons/axiom/wso2/axiom/1.2.11.wso2v4/axiom-1.2.11.wso2v4.jar
[ERROR] urls[15] = file:/Users/ishantgarg/.m2/repository/org/wso2/maven/org.wso2.maven.utils/2.1.0/org.wso2.maven.utils-2.1.0.jar
[ERROR] urls[16] = file:/Users/ishantgarg/.m2/repository/org/wso2/maven/org.wso2.maven.core/2.1.0/org.wso2.maven.core-2.1.0.jar
[ERROR] urls[17] = file:/Users/ishantgarg/.m2/repository/org/wso2/maven/org.wso2.maven.esb/2.1.0/org.wso2.maven.esb-2.1.0.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import from realm ClassRealm[maven.api, parent: null]]
[ERROR]
[ERROR] -----------------------------------------------------: javax.activation.DataSource
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn <goals> -rf :EmployeeInfo
我已经尝试清理我的本地存储库，这个应用程序只包含一个RESTneneneba API，它会以成功消息进行响应。没有逻辑。
此外，我还尝试从互联网上下载基本的代码片段，并尝试构建它们。我也犯了同样的错误。它可能与我本地计算机中的maven配置有关吗？
我遇到这个问题是因为maven使用的java版本。我使用brew安装了maven 3.6.x版本，发现它在内部使用java13。
我发现，针对wso2项目的maven构建不适用于高于8的java版本。
为了解决这个问题，我从apache的网站上安装了二进制maven，并将其配置为使用java8，因此我能够成功地构建maven多模块项目。
简短回答：停止使用WSO2
长话短说：由于Java 9，默认情况下JDK中不包括javax.activation库。因此，您必须将以下依赖项添加到每个需要javax.activation库。
<dependencies>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
</dependencies>
运行maven。阅读错误消息，了解哪个插件需要依赖项。将其作为依赖项添加，并一遍又一遍地做同样的事情，直到不再有插件为止剩下的都需要javax.activation库。
例如
<plugin>
<groupId>org.wso2.maven</groupId>
<artifactId>wso2-general-project-plugin</artifactId>
<dependencies>
<dependency>
<groupId>com.sun.activation</groupId>
<artifactId>javax.activation</artifactId>
<version>1.2.0</version>
</dependency>
</dependencies>
</plugin>
在您的错误消息中，插件名称为wso2 esb api插件