Mybatis获取SqlSession的工具类

package com.ujiuye.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 MybatisUtil {
    //需要将sqlSessionFactory设置为静态的,否则静态代码块中和获取sqlSession中的方法不能引用
    private static  SqlSessionFactory sqlSessionFactory = null;

    //静态代码块,只加载一次
    static {
        String resource = "mybatis-config.xml";
        InputStream inputStream = null;
        try {
            inputStream = Resources.getResourceAsStream(resource);
        } catch (IOException e) {
            e.printStackTrace();
        }
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
    }

    //一定记得加上static修饰,否则其他静态方法中不可以调用
    public static SqlSession getSqlSession(){
        return sqlSessionFactory.openSession();
    }
}