How can activiti fetch the next step node?

In Activiti, you can obtain the next step node by using the following method:

1. Use the getOutgoingTransitions() method of TaskService to retrieve all outgoing transitions of the current task. This will return a List object containing information for each outgoing transition.
2. To obtain the target node for each exit transition, you can use the getDestination() method of the Transition object.
3. By accessing the target node, you can use the getId() method of the Node object to retrieve the node’s ID.

Here is an example of obtaining the next step node using Java code:

import org.activiti.engine.task.Task;
import org.activiti.engine.TaskService;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.activiti.engine.runtime.ProcessInstance;

// 获取下一步节点的代码示例
public class GetNextNode {
    public static void main(String[] args) {
        String processDefinitionKey = "yourProcessDefinitionKey";
        String processInstanceId = "yourProcessInstanceId";

        // 获取TaskService、RepositoryService和RuntimeService对象
        TaskService taskService = activitiEngine.getTaskService();
        RepositoryService repositoryService = activitiEngine.getRepositoryService();
        RuntimeService runtimeService = activitiEngine.getRuntimeService();

        // 获取当前任务
        Task task = taskService.createTaskQuery()
                .processInstanceId(processInstanceId)
                .singleResult();

        // 获取当前任务的出口流转
        List<SequenceFlow> outgoingTransitions = repositoryService.getBpmnModel(task.getProcessDefinitionId())
                .getMainProcess().getFlowElement(task.getTaskDefinitionKey())
                .getOutgoingFlows();

        // 获取下一步节点
        List<String> nextNodeIds = new ArrayList<>();
        for (SequenceFlow flow : outgoingTransitions) {
            nextNodeIds.add(flow.getTargetFlowElement().getId());
        }

        // 输出下一步节点的ID
        for (String nodeId : nextNodeIds) {
            System.out.println("Next Node ID: " + nodeId);
        }
    }
}

Please note that this example assumes you already have a running process instance, and you know the ID of the current task and the key of the process definition. You will need to replace yourProcessDefinitionKey and yourProcessInstanceId with your specific values.