虚拟摄像头显示为;

examcloud-core-oe-admin-service/src/main/java/cn/com/qmth/examcloud/core/oe/admin/service/impl/ExamCaptureServiceImpl.java

@@ -8,7 +8,6 @@
 package cn.com.qmth.examcloud.core.oe.admin.service.impl;
 
 import cn.com.qmth.examcloud.commons.exception.StatusException;
-import cn.com.qmth.examcloud.core.basic.api.bean.CourseBean;
 import cn.com.qmth.examcloud.core.oe.admin.dao.ExamCaptureRepo;
 import cn.com.qmth.examcloud.core.oe.admin.dao.ExamRecordDataRepo;
 import cn.com.qmth.examcloud.core.oe.admin.dao.ExamScoreRepo;
@@ -42,7 +41,6 @@ import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
-import java.util.StringJoiner;
 
 /**
  * 考试抓拍检测相关接口
@@ -191,11 +189,11 @@ public class ExamCaptureServiceImpl implements ExamCaptureService {
                 }
             }
         }
-        StringJoiner sj = new StringJoiner(";");
+        StringBuffer sb = new StringBuffer();
         for (String cameraName : virtualCameraNames) {
-            sj.add(cameraName);
+            sb.append(cameraName).append(";");
         }
-        return sj.toString();
+        return sb.toString();
     }