no use

src/main/java/edu/nju/dao/ItemDao.java

@@ -1,6 +1,7 @@
 package edu.nju.dao;
 
-import edu.nju.entities.Item;
+
+import edu.nju.entities.*;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.mongodb.core.MongoOperations;
 import org.springframework.data.mongodb.core.query.Criteria;

src/main/java/edu/nju/service/ItemService.java

@@ -1,12 +1,8 @@
 package edu.nju.service;
 
-import edu.nju.dao.AnswerDao;
-import edu.nju.dao.ItemDao;
-import edu.nju.dao.JobDao;
-import edu.nju.dao.UserToItemDao;
-import edu.nju.entities.Answer;
-import edu.nju.entities.Item;
-import edu.nju.entities.Job;
+
+import edu.nju.dao.*;
+import edu.nju.entities.*;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;