專案地址：https://gitee.com/lwj/flowable.git 分支flowable-base
*業務場景：
收集每個員工的績效考核資訊；
收集一次組織活動的資訊；
一個合同需要三個經理審批，可以是順序的也可以是並行的；
一個合同計劃審批有30個人審批，只需要其中70%的人審批通過即可。等等 *

1、任務多例項四個內建變數

2、配置多例項

2.1、配置引數

2.2、配置候選人

2.3、配置結束條件

3、啟動設定userList

public ReturnVo add(Leave leave, String sessionId) {
        ReturnVo returnVo = new ReturnVo(ReturnCode.FAIL, "新增失敗");
        try {
            String leaveId = UUIDGenerator.generate();
            leave.setId(leaveId);
            StartProcessInstanceVo startProcessInstanceVo = new StartProcessInstanceVo();
            startProcessInstanceVo.setBusinessKey(leaveId);
            User user = SecurityUtils.getCurrentUserObject();
            startProcessInstanceVo.setCreator(user.getId());
            startProcessInstanceVo.setCurrentUserCode(user.getId());
            startProcessInstanceVo.setFormName("請假流程");
            startProcessInstanceVo.setSystemSn("flow");
            startProcessInstanceVo.setProcessDefinitionKey("leave");
            Map<String, Object> variables = new HashMap<>();
            variables.put("days", leave.getDays());
            startProcessInstanceVo.setVariables(variables);
            //設定三個人作為多例項的人員
            List<String> userList = new ArrayList<>();
            userList.add("00000005");
            userList.add("00000006");
            variables.put("userList", userList);

            ReturnVo<ProcessInstance> returnStart = flowableProcessInstanceService.startProcessInstanceByKey(startProcessInstanceVo);
            if (returnStart.getCode().equals(ReturnCode.SUCCESS)){
                String processInstanceId = returnStart.getData().getProcessInstanceId();
                leave.setProcessInstanceId(processInstanceId);
                this.LeaveService.insertLeave(leave);
                returnVo = new ReturnVo(ReturnCode.SUCCESS, "新增成功");
            }else {
                returnVo = new ReturnVo(returnStart.getCode(), returnStart.getMsg());
            }
        } catch (Exception e) {
            logger.error("LeaveController-add:", e);
            e.printStackTrace();
        }
        return returnVo;
    }