rename cache keys.

examcloud-core-oe-admin-service/src/main/java/cn/com/qmth/examcloud/core/oe/admin/service/cache/ExamStudentCache.java

@@ -2,6 +2,7 @@ package cn.com.qmth.examcloud.core.oe.admin.service.cache;
 
 import cn.com.qmth.examcloud.core.oe.admin.dao.ExamStudentRepo;
 import cn.com.qmth.examcloud.core.oe.admin.dao.entity.ExamStudentEntity;
+import cn.com.qmth.examcloud.support.CacheConstants;
 import cn.com.qmth.examcloud.support.cache.bean.ExamStudentCacheBean;
 import cn.com.qmth.examcloud.web.cache.RandomObjectRedisCache;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -38,7 +39,7 @@ public class ExamStudentCache extends RandomObjectRedisCache<ExamStudentCacheBea
 
     @Override
     protected String getKeyPrefix() {
-        return "OE_ES:";
+        return CacheConstants.CACHE_OE_EXAM_STUDENT;
     }
 
     @Override