MyBatisUtil

package com.baizhi.util;

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;

public class MyBatisUtil {
    private static SqlSessionFactory ssf;
    static {
        try {
            //读取主配置文件
            Reader reader = Resources.getResourceAsReader("mybatis-config.xml");
            //创建sqlsessionfactory(sqlsession工厂)
            ssf = new SqlSessionFactoryBuilder().build(reader);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
    public static SqlSession getSqlSession() {
        //通过ssf获取sqlsession
        SqlSession sqlSession = null;
        sqlSession = ssf.openSession();
        return sqlSession;
    }
    //先判断sqlsession不是空再关
    public static void close(SqlSession sqlSession) {
        if(sqlSession!=null) {
            sqlSession.close();
        }
    }
}