--no commit message

com.zrqx.resource/src/main/java/com/zrqx/resource/bg/service/year/YearLibrarySerivceImpl.java

@@ -56,6 +56,9 @@ public class YearLibrarySerivceImpl extends BaseServiceImpl<YearLibrary,String>
 		if(entity.getId() == null){
 			//添加
 			Integer maxOrderNum = mapper.getMaxOrderNum();
+			if(maxOrderNum==null) {
+				 maxOrderNum =0;
+			}
 			entity.setSort(maxOrderNum+1);
 			entity.setUploadTime(new Date());
 			mapper.insert(entity);