在iBATIS.中我们可以灵活的选择DAO类型,也就是可以在底层选用不同的数据库操作方式。有常规方式、配置文件的方式、Hibernet的方式等:
1、常规方式
和我们之前的ADO.net开发较为类似,都是将sql语句写在cs代码中进行调用:
首先通过配置文件初始化:
- DomDaoManagerBuilder builder = new DomDaoManagerBuilder();
- builder.Configure("dao" + "_" + ConfigurationManager.AppSettings["database"] + "_"
- + ConfigurationManager.AppSettings["providerType"] + ".config");
- daoManager = DaoManager.GetInstance("SimpleDao");
相对应的配置文件如下:
- ﹤context id="SimpleDao" default="true"﹥
- ﹤properties resource="../../database.config"/﹥
- ﹤!-- ==== SqlClient configuration (default provider) ========= --﹥
- ﹤database﹥
- ﹤!-- Optional ( default ) --﹥
- ﹤provider name="sqlServer1.1"/﹥
- ﹤dataSource name="iBatisNet" connectionString="data
- source=${datasource};database=${database};user id=${userid};password=${password};
- connection reset=false;connection lifetime=5; min pool size=1; max pool size=50"/﹥
- ﹤/database﹥
- ﹤daoFactory﹥
- ﹤dao interface="IBatisNet.DataAccess.Test.Dao.
- Interfaces.IAccountDao, IBatisNet.DataAccess.Test" implementation="IBatisNet.
- DataAccess.Test.Dao.Implementations.Ado.AccountDao, IBatisNet.DataAccess.Test"/﹥
- ﹤/daoFactory﹥
- ﹤/context﹥
然后在对应的,比如AccountDao中写具体的查询sql等
2、配置方式
将sql语句放在配置文件中,书写和修改较灵活,这也是比较常用的方式
首先通过配置文件初始化:
- DomDaoManagerBuilder builder = new DomDaoManagerBuilder();
- builder.Configure("dao" + "_" + ConfigurationManager.AppSettings["database"] + "_"
- + ConfigurationManager.AppSettings["providerType"] + ".config");
- daoManager = DaoManager.GetInstance("SqlMapDao");
相对应的配置文件如下:
- ﹤context id="SqlMapDao"﹥
- ﹤properties resource="../../database.config"/﹥
- ﹤!-- ==== SqlClient configuration ========= --﹥
- ﹤database﹥
- ﹤dataSource name="iBatisNet" connectionString="data source=${datasource};
- database=${database};user id=${userid};password=${password};connection
- reset=false;connection lifetime=5; min pool size=1; max pool size=50"/﹥
- ﹤/database﹥
- ﹤daoSessionHandler id="SqlMap"﹥
- ﹤!-- --﹥
- ﹤property name="resource" value="SqlMap_MSSQL_SqlClient.config"/﹥
- ﹤!-- ﹤property name="url" value="
- E:\Projet\iBatis\trunk\cs\mapper\IBatisNet.
- DataAccess.Test\bin\Debug\SqlMap_MSSQL_SqlClient.config"/﹥
- --﹥
- ﹤!--
- ﹤property name="embedded" value="bin.
- Debug.SqlMap_MSSQL_SqlClient.config, IBatisNet.DataAccess.Test"/﹥
- --﹥
- ﹤/daoSessionHandler﹥
- ﹤daoFactory﹥
- ﹤dao interface="IBatisNet.DataAccess.
- Test.Dao.Interfaces.IAccountDao, IBatisNet.DataAccess.
- Test" implementation="IBatisNet.DataAccess.Test.Dao.Implementations.
- DataMapper.AccountDao, IBatisNet.DataAccess.Test"/﹥
- ﹤/daoFactory﹥
- ﹤/context﹥
然后可以将每一张表的sql语句单独放在一个配置文件中,比如:
- ﹤select id="GetAccountsDynamic" resultMap="account-result" parameterClass="Hashtable" ﹥
- select top $MaximumAllowed$ * from Accounts
- ﹤dynamic prepend="where"﹥
- ﹤isParameterPresent﹥
- ﹤isNotEmpty prepend="and" property="FirstName" ﹥
- Account_FirstName LIKE '%$FirstName$%'
- ﹤/isNotEmpty﹥
- ﹤isNotEmpty prepend="and" property="LastName" ﹥
- Account_LastName LIKE '%$LastName$%'
- ﹤/isNotEmpty﹥
- ﹤isNotEmpty prepend="and" property="EmailAddress" ﹥
- Account_Email LIKE '%$EmailAddress$%'
- ﹤/isNotEmpty﹥
- ﹤/isParameterPresent﹥
- ﹤/dynamic﹥
- order by Account_LastName
- ﹤/select﹥
3、使用Hibernet方式
也就是使用Hibernet的数据库操作。
那么IBATIS.net中DAO的介绍就到这里,是不是对常用DAO有所了解了呢?
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