501流程测试修改，作废流程添加

ruoyi-admin/src/main/java/com/ruoyi/out/outStockout/service/impl/OutStockoutServiceImpl.java

@@ -182,7 +182,7 @@ public class OutStockoutServiceImpl implements IOutStockoutService
                 }
             }
         }
-        if (stringBuilder.length()>0){
+        if (!stringBuilder.isEmpty()){
             return AjaxResult.warn(stringBuilder.toString());
         }
         return AjaxResult.success();