创建SqlSessionFactory工厂类，并生产sqlSession-生产阶段，代码示例

一. SqlSessionFacotry接口及DefaultSqlSessionFacotry实现类

SqlSessionFacotry接口代码示例：

package com.lagou.sqlSession;

public interface SqlSessionFactory {

    public SqlSession openSession();


}

DefaultSqlSessionFacotry实现类：

package com.lagou.sqlSession;

import com.lagou.pojo.Configuration;

public class DefaultSqlSessionFactory implements SqlSessionFactory {

    private Configuration configuration;

    public DefaultSqlSessionFactory(Configuration configuration) {
        this.configuration = configuration;
    }


    @Override
    public SqlSession openSession() {
        return new DefaultSqlSession(configuration);
    }
}

二.SqlSession接口及DefaultSqlSession实现类

SqlSession接口代码示例：

package com.lagou.sqlSession;

import java.util.List;

public interface SqlSession {

    //查询所有
    public <E> List<E> selectLi