update - 消息模版触发时机为空设置为空列表避免空指针异常

workflow-engine-core/src/main/java/cn/axzo/workflow/core/common/utils/BpmnMetaParserHelper.java

@@ -139,7 +139,8 @@ public final class BpmnMetaParserHelper {
                 String events = v.get(0).getChildElements().getOrDefault(TEMPLATE_NOTICE_MESSAGE_EVENTS, Collections.emptyList())
                         .get(0).getElementText();
                 List<BpmnProcessInstanceResultEnum> resultEnums = JSON.parseArray(events, BpmnProcessInstanceResultEnum.class);
-                notice.setTriggerEvents(resultEnums);
+                //触发时机为Null，设置为空列表
+                notice.setTriggerEvents(resultEnums == null ? Collections.emptyList() : resultEnums);
 
                 v.get(0).getChildElements().getOrDefault(TEMPLATE_NOTICE_MESSAGE_DESTINATION, Collections.emptyList()).get(0).getChildElements()
                         .forEach((a, b) -> {