在一个项目中，通常不能在另一个项目中执行任意代码。
您可以做的是让作业B使用archiveArtifacts，当它完成时，调用作业（作业A）可以从它触发的作业B的示例中检索对象。build命令将返回一个作业“句柄”，该句柄具有足够的信息，可以让您构建一个copyArtifacts命令。

job A
//////////

stage('Produce artifacts'){
     // First, produce some artifacts for Job B and archive them so that they are available to Job B
     archiveArtifacts artifacts: "testz.zip"
}

stage('Validation'){
     // Invoke Job B (blocks until job B completes)
     def jobB = build job: "JOB_B"

     // Retrieve artifacts from Job B after it completes
     final String artifactsFilter = "build/*.csv"
     copyArtifacts filter: artifactsFilter, projectName: "JOB_B", selector: specific("${jobB.number}")
     // re-attach the same artifacts to Job A (now that they have been copied back into Job A workspace)
     archiveArtifacts artifacts: artifactsFilter
}

Job B 
/////////

stage('Copy Artifacts from Job A'){
    copyArtifacts filter: 'testz.zip', fingerprintArtifacts: true,
                projectName: currentBuild.upstreamBuilds[0].fullProjectName,
                selector: upstream()
}
stage('Do something'){
}
stage('Archive Artifacts for Job A'){
    // Archive desired artifacts
    archiveArtifacts artifacts: "build/**.csv"
}