MyBatis框架主要是圍繞著SqlSessionFactory這個類進行的，這個的建立過程如下：

1. 定義一個Configuration物件，其中包含資料來源、事務、mapper檔案資源以及影響資料庫行為屬性設定settings
2. 通過配置物件，則可以建立一個SqlSessionFactoryBuilder物件
3. 通過 SqlSessionFactoryBuilder 獲得SqlSessionFactory 的例項。
4. SqlSessionFactory 的例項可以獲得操作資料的SqlSession例項，通過這個例項對資料庫進行操作

• <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-config.dtd">
  <configuration>
  	<properties resource="ssm/jdbc.properties"></properties>
  	<environments default="development">
  		<environment id="development">
  			<transactionManager type="JDBC" />
  			<dataSource type="POOLED">
  				<property name="driver" value="${jdbc.driverClassName}"/>
  				<property name="url" value="${jdbc.url}"/>
  				<property name="username" value="${jdbc.username}"/>
  				<property name="password" value="${jdbc.password}"/>
  			</dataSource>
  		</environment>
  	</environments>	
  	
  	<mappers>
  		<mapper resource="ssm/BlogMapper.xml"/>
  	</mappers>
  </configuration>
   
  

• 程式碼實現

• package ssm;
  
  import java.io.IOException;
  import java.io.Reader;
  
  import org.apache.ibatis.io.Resources;
  import org.apache.ibatis.session.SqlSession;
  import org.apache.ibatis.session.SqlSessionFactory;
  import org.apache.ibatis.session.SqlSessionFactoryBuilder;
  
  import com.sm.model.User;
  
  public class GetSqlSessionFactoryFromXML {
  
  	public static void main(String[] args) throws IOException {
  		//配置檔案的名稱
  		String resource = "ssm/configuration.xml";
  		//通過Mybatis包中的Resources物件很輕鬆的獲取到配置檔案
  		Reader reader = Resources.getResourceAsReader(resource);
  		//通過SqlSessionFactoryBuilder建立
  		SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
  		//獲得session例項
  		SqlSession session =sqlSessionFactory.openSession();
  		User user = new User();
  		user.setId(8);
  		//完成資料庫的插入
  		session.insert("add", user);
  		session.commit();
  		session.close();
  		System.out.println(sqlSessionFactory);
  	}
  }
   
  

二、在程式中構建這些物件來建立

• 程式碼實現

• package ssm;
  
  import java.sql.SQLException;
  
  import javax.sql.DataSource;
  
  import org.apache.ibatis.datasource.pooled.PooledDataSource;
  import org.apache.ibatis.mapping.Environment;
  import org.apache.ibatis.session.Configuration;
  import org.apache.ibatis.session.SqlSession;
  import org.apache.ibatis.session.SqlSessionFactory;
  import org.apache.ibatis.session.SqlSessionFactoryBuilder;
  import org.apache.ibatis.transaction.TransactionFactory;
  import org.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;
  
  import com.sm.model.User;
  
  public class GetSqlSessionFactoryFromProgram {
  
  	public static void main(String[] args) throws SQLException {
  		String driver = "oracle.jdbc.OracleDriver";
  		String url = "jdbc:oracle:thin:@localhost:1521:orcl";
  		String username="scott";
  		String password="tiger";
  		//建立使用快取池的資料來源
  		/* 
  		 * <dataSource type="POOLED">
  				<property name="driver" value="${jdbc.driverClassName}"/>
  				<property name="url" value="${jdbc.url}"/>
  				<property name="username" value="${jdbc.username}"/>
  				<property name="password" value="${jdbc.password}"/>
  			</dataSource>
  		 */
  		DataSource dataSource =new PooledDataSource(driver,url,username,password);
  		
  		//建立事務
  		/*
  		 * <transactionManager type="JDBC" />
  		 */
  		TransactionFactory transactionFactory =  new JdbcTransactionFactory();
  		
  		Environment environment = new Environment("development", transactionFactory, dataSource);
  		
  		Configuration configuration = new Configuration(environment);
  		//加入資源
  		/*
  		 * <mapper resource="ssm/BlogMapper.xml"/>
  		 */
  		configuration.addMapper(UserMapper.class);
  		SqlSessionFactory sqlSessionFactory = new  SqlSessionFactoryBuilder().build(configuration);
  		System.out.println(sqlSessionFactory);
  		
  		SqlSession session =  sqlSessionFactory.openSession();
  		User user = new User();
  		user.setId(6);
   		session.insert("add", user);
   		session.commit();
  		session.close();
  	}
  }
  

• 在spring的配置檔案applicationContext.xml中配置

• <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
         <property name="dataSource" ref="dataSource" />
         <property name="configLocation" value="classpath*:conf/configuration.xml" />
  	
  </bean>

  如果使用則直接注入，獲取SqlSessionFactory例項即可。