fix 修复 驳回删除任务可能空指针异常，调整示例状态

ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/service/impl/ActTaskServiceImpl.java

@@ -692,8 +692,10 @@ public class ActTaskServiceImpl implements IActTaskService {
             MultiInstanceVo multiInstance = WorkflowUtils.isMultiInstance(task.getProcessDefinitionId(), task.getTaskDefinitionKey());
             if (multiInstance == null && taskList.size() > 1) {
                 List<Task> tasks = StreamUtils.filter(taskList, e -> !e.getTaskDefinitionKey().equals(task.getTaskDefinitionKey()));
+                if (CollUtil.isNotEmpty(tasks)) {
                     actHiTaskinstMapper.deleteBatchIds(StreamUtils.toList(tasks, Task::getId));
                 }
+            }
 
 
             List<HistoricTaskInstance> instanceList = QueryUtils.hisTaskInstanceQuery(processInstanceId).finished().orderByHistoricTaskInstanceEndTime().desc().list();

ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/service/impl/TestLeaveServiceImpl.java

@@ -122,7 +122,9 @@ public class TestLeaveServiceImpl implements ITestLeaveService {
     public void processHandler(ProcessEvent processEvent) {
         log.info("当前任务执行了{}", processEvent.toString());
         TestLeave testLeave = baseMapper.selectById(Long.valueOf(processEvent.getBusinessKey()));
-        testLeave.setStatus(processEvent.getStatus());
+        if (processEvent.isSubmit()) {
+            testLeave.setStatus(BusinessStatusEnum.WAITING.getStatus());
+        }
         baseMapper.updateById(testLeave);
     }