MyBatis之SessionFactory与Session简介说明

SessionFactory简介

SessionFactory是一个产生session的工厂

SessionFactory简介

public interface SqlSessionFactory {

  SqlSession openSession();

  SqlSession openSession(boolean autoCommit);
  SqlSession openSession(Connection connection);
  SqlSession openSession(TransactionIsolationLevel level);

  SqlSession openSession(ExecutorType execType);
  SqlSession openSession(ExecutorType execType, boolean autoCommit);
  SqlSession openSession(ExecutorType execType, TransactionIsolationLevel level);
  SqlSession openSession(ExecutorType execType, Connection connection);

  Configuration getConfiguration();

}

SessionFactory模拟实现

public interface SessionFactory {
    Session openSession();
}
 
使用XMLConfigBuilder只需将文件名传给它
然后就会生成一个DataSource

public class VSessionFactory implements SessionFactory {

    private DataSource config;

    public VSessionFactory(String resource) {
        config = XMLConfigBuilder.build(resource);
    }

    public Session openSession() {
        return new VSession(config);
    }
}
 

//测试代码
public static void main(String args[]) throws Exception {
    SessionFactory factory = new VSessionFactory("config.xml");
    Session session = factory.openSession();
    session.exec("select * from users where id>8");
}