processInstanceId是流程实例id

方式一：使用RuntimeService

RuntimeService runtimeService = processEngine.getRuntimeService();
String processInstanceId = "your_process_instance_id"; // 替换为实际的流程实例ID

// 检查流程实例是否已经结束
boolean isEnded = runtimeService.createProcessInstanceQuery()
    .processInstanceId(processInstanceId)
    .finished() // 查询已完成的流程实例
    .count() > 0;

if (isEnded) {
    System.out.println("流程实例已结束");
} else {
    System.out.println("流程实例未结束或不存在");
}

方式二：使用HistoryService

HistoryService historyService = processEngine.getHistoryService();
String processInstanceId = "your_process_instance_id";

// 查询历史流程实例并判断是否结束
HistoricProcessInstance historicProcessInstance = historyService.createHistoricProcessInstanceQuery()
    .processInstanceId(processInstanceId)
    .singleResult();
// 也可以判断结束时间是否为空
if (historicProcessInstance != null && historicProcessInstance.getEndTime() != null) {
    System.out.println("流程实例已结束");
} else {
    System.out.println("流程实例未结束或不存在");
}
// 也可以判断结束节点是否有数据
if (historicProcessInstance != null && historicProcessInstance.getEndActivityId() != null) {
    System.out.println("流程实例已结束");
} else {
    System.out.println("流程实例未结束或不存在");
}