entity层:
dao层:
IBookDAO
BookDAOImpl
![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142243707-1485377336.png)
service层:
IBookService
![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142331379-680891966.png)
BookServiceImpl
![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142401207-1171477376.png)
连接数据库:
jdbc.propertits
![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142521676-1136025930.png)
pom.xml
![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142658348-1598626344.png)
alibaba
![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142720973-1160674406.png)
配置文件:applocationContextday16jdbc.xml:
第一步:连接数据源::::::::::::::::
第一种:![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142826863-1696511562.png)
第二种:![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023142906613-1258074846.png)
第二部:识别到jdbc.properties文件:
第三部:DAO:
第四部:service:
单侧:
![](https://images2017.cnblogs.com/blog/1115956/201710/1115956-20171023143116098-1253313668.png)