重构。

ruoyi-sim/src/main/java/com/ruoyi/sim/service/impl/CommSendService.java

@@ -710,13 +710,14 @@ public class CommSendService {
         }
         if (listNG.isEmpty()) {
             return AjaxResult.success("所有故障部位检查没有问题。");
+        } else {
+            StringBuilder sbNG = new StringBuilder();
+            for (Fault f : listNG) {
+                sbNG.append("[" + f.getReplaceName() + "]可换件异常;<br>");
+            }
+            sbNG.append("请正确安装可换件，检查后重新开始考试！");
+            return AjaxResult.error(sbNG.toString());
         }
-        StringBuilder sbNG = new StringBuilder();
-        for (Fault f : listNG) {
-            sbNG.append("[" + f.getReplaceName() + "]可换件异常;<br>");
-        }
-        sbNG.append("请正确安装可换件，检查后重新开始考试！");
-        return AjaxResult.error(sbNG.toString());
     }
 
     /**