Spring activiti如何实现指定任务处理者

package com.yl;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

public class ActivitiTest {
  //创建工作流引擎
  ProcessEngine processEngine= ProcessEngines.getDefaultProcessEngine();
  //管理流程文件的对象
  RepositoryService repositoryService=processEngine.getRepositoryService();
  //管理流程实例的对象
  RuntimeService runtimeService=processEngine.getRuntimeService();
  //管理任务节点的对象
  TaskService taskService=processEngine.getTaskService();
  //流程实例id
  private String processInstanceId;

  /**
   * 部署流程文件
   */
  @Test
  public void deployment() {
    //部署bpmn文件到数据库表
    Deployment deployment=repositoryService.createDeployment().addClasspathResource("hello.bpmn").deploy();

    System.out.println("部署文件id="+deployment.getId());
  }


  /**
   * 启动流程实例
   */
  @Test
  public void start(){
    //启动流程实例
    ProcessInstance processInstance=runtimeService.startProcessInstanceByKey("myProcess_1");

    processInstanceId=processInstance.getId();

    System.out.println("流程实例id="+processInstanceId);
  }

  /**
   * 获取当前任务节点对象及完成此任务节点
   */
  @Test
  public void complete(){
    //获取任务节点对象
    List<Task> taskList= taskService.createTaskQuery().processInstanceId(processInstanceId).taskAssignee("yl01").list();
    for(Task task:taskList){
      System.out.println("待办事务="+task.getName());
    }
    //完成此任务节点
    taskService.complete(task.getId());
  }
}

package com.yl;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

public class ActivitiTest {
  //创建工作流引擎
  ProcessEngine processEngine= ProcessEngines.getDefaultProcessEngine();
  //管理流程文件的对象
  RepositoryService repositoryService=processEngine.getRepositoryService();
  //管理流程实例的对象
  RuntimeService runtimeService=processEngine.getRuntimeService();
  //管理任务节点的对象
  TaskService taskService=processEngine.getTaskService();
  //流程实例id
  private String processInstanceId;

  /**
   * 部署流程文件
   */
  @Test
  public void deployment() {
    //部署bpmn文件到数据库表
    Deployment deployment=repositoryService.createDeployment().addClasspathResource("hello.bpmn").deploy();

    System.out.println("部署文件id="+deployment.getId());
  }

  /**
   * 启动流程实例
   */
  @Test
  public void start(){
    //存储任务处理者
    Map<String,Object> variables=new HashMap<>();
    variables.put("name1","yl01");

    //启动流程实例并指定任务处理对象
    ProcessInstance processInstance=runtimeService.startProcessInstanceByKey("myProcess_1",variables);

    processInstanceId=processInstance.getId();

    System.out.println("流程实例id="+processInstanceId);
  }

  /**
   * 获取当前任务节点对象及完成此任务节点
   */
  @Test
  public void complete(){
    //获取任务节点对象
    Task task= taskService.createTaskQuery().processInstanceId(processInstanceId).taskAssignee("yl01").singleResult();

    System.out.println("待办事务="+task.getName());

    //完成此任务节点
    taskService.complete(task.getId());
  }
}