根据姓名搜索学生信息

src/main/java/com/xhkjedu/controller/EPaperVerifyController.java

 import org.springframework.web.bind.annotation.RestController;
 
 import javax.annotation.Resource;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
     public ResultVo listStudentByStudentname(@RequestBody EClassStudent student) {
         Integer examid = student.getExamid();
         String studentname = student.getStudentname();
-        if(N_Utils.isEmpty(studentname)) return new ResultVo(0, "获取成功！", null);
+        if(N_Utils.isEmpty(studentname)) return new ResultVo(0, "获取成功！", new ArrayList<>());
         N_Utils.validation(new Object[]{examid, "考试id", 1});
         List<Map> list = ePaperVerifyService.listStudentByStudentname(examid, studentname, student.getClassid());
+        if (list == null) list = new ArrayList<>();
         return new ResultVo(0, "获取成功！", list);
     }