您像使用maven一样调用ant（请参阅示例 https://jenkins.io/doc/pipeline/jenkinsfile/ ）：

You invoke ant just like you do it with maven (take a look at examples https://jenkins.io/doc/pipeline/jenkinsfile/):

 node ('linux'){
  stage 'Build and Test'
  env.PATH = "${tool 'Ant'}/bin:${env.PATH}"
  checkout scm
  sh 'ant build'
 }

任务本身应该配置在 build.xml 中。

The tasks themselves should be configured in the build.xml.