diff --git a/servers/boe-server-all/src/main/java/com/xboe/school/study/dao/StudyExamDao.java b/servers/boe-server-all/src/main/java/com/xboe/school/study/dao/StudyExamDao.java
index 1b7eb5f8..f1bb62e8 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/school/study/dao/StudyExamDao.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/school/study/dao/StudyExamDao.java
@@ -11,7 +11,7 @@ import java.util.List;
 public class StudyExamDao extends BaseDao<StudyExam> {
 
     public List<StudyExam> getAllStudyExamByStudyId() {
-        String hql1 = "SELECT course_id,study_id,student_id FROM boe_study_exam GROUP BY study_id";
+        String hql1 = "SELECT courseId,studyId,studentId FROM boe_study_exam GROUP BY study_id";
         List<StudyExam> listByHql = super.findListByHql(hql1);
         return listByHql;
     }
diff --git a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyExamServiceImpl.java b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyExamServiceImpl.java
index 2713f795..a247a654 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyExamServiceImpl.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/school/study/service/impl/StudyExamServiceImpl.java
@@ -6,6 +6,8 @@ import java.util.List;
 import javax.annotation.Resource;
 import javax.transaction.Transactional;
 
+import com.xboe.core.orm.QueryBuilder;
+import com.xboe.system.user.entity.Message;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -110,7 +112,19 @@ public class StudyExamServiceImpl implements IStudyExamService{
 	@Override
 	public void correctStstus() {
 
-		List<StudyExam> list = dao.getAllStudyExamByStudyId();
+		List<StudyExam> list = null;
+		try {
+			list = dao.getAllStudyExamByStudyId();
+		} catch (Exception exception) {
+			exception.printStackTrace();
+		}
+
+		QueryBuilder builder = QueryBuilder.from(StudyExam.class);
+		builder.addGroupBy("studyId");
+		builder.addOrder(OrderCondition.desc("msgTime"));
+		List<StudyExam> list1 = dao.findList(builder.builder());
+
+		log.info("QueryBuilder list1.size = " + list1.size() + ",0 = " + list1.get(0));
 		log.info("list.size = " + list.size() + ",0 = " + list.get(0));
 		for(StudyExam item : list){
 			log.info("CourseId = " + item.getCourseId() + " , StudyId = " + item.getStudyId() + " , StudentId = " + item.getStudentId());