获取云阅卷成绩修改

themis-business/src/main/java/com/qmth/themis/business/bean/cloudmark/StudentScoreParams.java

@@ -47,6 +47,7 @@ public class StudentScoreParams extends BaseParams implements Serializable {
         if (Objects.isNull(this.examId) && Objects.isNull(this.examCode)) {
             throw new BusinessException("examId或examCode必填一个");
         }
+        this.examCode = null;
     }
 
     public Long getExamId() {