Merge branch 'dev' of http://192.168.1.245:11111/jinjilong/onlineEducation-fwd into dev

snowy-plugin/snowy-plugin-exam/snowy-plugin-exam-func/src/main/java/vip/xiaonuo/exam/controller/student/ExamPaperAnswerController.java

@@ -4,6 +4,7 @@ import cn.hutool.core.util.ObjectUtil;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.github.xiaoymin.knife4j.annotations.ApiOperationSupport;
 import com.github.xiaoymin.knife4j.annotations.ApiSupport;
+import io.jsonwebtoken.lang.Collections;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import org.apache.commons.lang3.StringUtils;
@@ -60,6 +61,9 @@ public class ExamPaperAnswerController extends BaseApiController {
     public CommonResult<Page<ExamPaperAnswerVo>> pageList(@RequestBody @Valid ExamPaperAnswerPageVM model) {
         //根据老师id查询对应的学生
         List<String> studentIds=examPaperAnswerService.studentIds(StpLoginUserUtil.getLoginUser().getId());
+        if(Collections.isEmpty(studentIds)){
+            return CommonResult.error("当前老师对应的班级没有查到学生!!!");
+        }
         //查出对应学生的试卷
         Page<ExamPaperAnswerVo> pageInfo = examPaperAnswerService.studentPage(model,studentIds);
         return CommonResult.data(pageInfo);