feat: 更改创建考试接口（加上允许考试的次数）

src/main/java/com/nju/edu/eval/data/entity/Exam.java

@@ -91,6 +91,9 @@ public class Exam {
 
     private Integer isHidden;
 
+    //允许考试多少次
+    private Integer examCount;
+
 //    private List<Question>
 
     public Exam(String examName, String position, List<String> skills, Date startTime, Date endTime, String comment, User user, Course course) {

src/main/java/com/nju/edu/eval/model/vo/exam/CreateExamVO.java

@@ -37,4 +37,6 @@ public class CreateExamVO {
     private Boolean isPublic;
 
     private Integer courseId;
+
+    private Integer examCount;
 }

src/main/java/com/nju/edu/eval/service/serviceImpl/ExamServiceImpl.java

@@ -52,6 +52,8 @@ public class ExamServiceImpl implements ExamService {
                                                       examVO.getSkills(), examVO.getStartTime(),
                                                       examVO.getEndTime(), examVO.getComment(), user, course);
         exam.setIsHidden(0);
+        //设置允许考试次数
+        exam.setExamCount(examVO.getExamCount());
         // 只有非公开的考试才需要邀请码
         if (!examVO.getIsPublic()) {
             exam.setIsPublic(0);