创建SqlSessionFactory的过程
时间: 2024-06-14 16:05:43 浏览: 31
创建SqlSessionFactory的过程如下:
1. 导入相关的包或模块:
```python
import org.apache.ibatis.io.Resources
import org.apache.ibatis.session.SqlSessionFactoryBuilder
```
2. 加载MyBatis的配置文件:
```python
String resource = "mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
```
3. 创建SqlSessionFactory对象:
```python
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
```
4. 配置MyBatis的配置文件(mybatis-config.xml):
```python
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/example/mapper/MyMapper.xml"/>
</mappers>
</configuration>
```
5. 配置数据源(dataSource)和事务管理器(transactionManager):
```python
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
<transactionManager type="JDBC"/>
```
6. 配置映射文件(mapper):
```python
<mappers>
<mapper resource="com/example/mapper/MyMapper.xml"/>
</mappers>
```
7. 创建映射文件(MyMapper.xml):
```python
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.mapper.MyMapper">
<select id="selectUser" resultType="com.example.model.User">
SELECT * FROM user WHERE id = #{id}
</select>
</mapper>
```
以上是创建SqlSessionFactory的过程,通过加载MyBatis的配置文件,配置数据源和事务管理器,以及创建映射文件,最终创建SqlSessionFactory对象。接下来可以使用SqlSessionFactory对象创建SqlSession进行数据库操作。
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