2.15、创建 MyBatisUtil 工具类

package com.wzy.utils;
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 java.io.IOException;
import java.io.InputStream;
public class MyBatilsUtils {
    //定义 SqlSessionFactory
    public static SqlSessionFactory factory = null;
    //使用 静态块 创建一次 SqlSessionFactory
    static {
        try {
            //1.MyBatis 主配置文件
            String config = "MyBatis.xml";
            //2.读取配置文件
            InputStream resourceAsStream = Resources.getResourceAsStream(config);
            //3.创建 SqlSessionFactory 类,为了获取SqlSession sql语句执行类
            factory = new SqlSessionFactoryBuilder().build(resourceAsStream);
        } catch (IOException e) {
            factory = null;
            e.printStackTrace();
        }
    }
    //获取 SqlSession 对象
    public static SqlSession getSqlSession(){
        SqlSession session = null;
        if (factory != null) {
            session = factory.openSession();
        }
        return session;
    }
}