maven引入：

<dependency>
    <groupId>com.dangdang</groupId>
    <artifactId>elastic-job-lite-lifecycle</artifactId>
    <version>2.1.2</version>
</dependency>

java代码为：(为了较好的展示，代码加了回车)

JobOperateAPI jobAPIService= 
JobAPIFactory.createJobOperateAPI("zookeeper地址", "任务命名空间"
, Optional.fromNullable(null));

jobAPIService.trigger(Optional.of("定时任务类的全类名")
, Optional.<String>absent());