![](https://csdnimg.cn/release/download_crawler_static/86347097/bg5.jpg)
100. }
101.
102. public void setDbNumber(int dbNumber) {
103. this.dbNumber = dbNumber;
104. }
105.
106. }
Dao 层实现
[java] view plain copy
1. package com.imooc.dao;
2.
3. import java.util.HashMap;
4. import java.util.List;
5. import java.util.Map;
6.
7. import org.apache.ibatis.session.SqlSession;
8. import com.imooc.bean.Message;
9. import com.imooc.common.Page;
10. import com.imooc.db.DBAccess;
11.
12. public class MessageDao {
13.
14. DBAccess dbAccess = new DBAccess();
15.
16. //计算查询的数据的总数
17.
18. public int getMessageCount(String command,String description) throw
s Exception{
19. int count = 0;
20. SqlSession session = null;
21. try {
22. session = dbAccess.getSqlSession();
23. Message message = new Message();
24. message.setCommand(command);
25. message.setDescription(description);
26. count = session.selectOne(Message.class.getName()+".count", mess
age);
27. } catch (Exception e) {
28. throw new Exception(e.getMessage());
29. } finally {