Mybatis_一级缓存

    SqlSessionFactory sessionFactory;
    public void selectPersonByIdLazy() {
        // 创建SqlSession
        SqlSession session = sessionFactory.openSession();
        try {
            // 第一次查询的是数据库
            Person person = session.selectOne("xxx.x.mapper.PersonMapper.selectPersonById", 1);
            // 第一次查询的是缓存
            Person person1 = session.selectOne("xxx.x.mapper.PersonMapper.selectPersonById", 1);
            System.out.println(person);
            System.out.println(person1);
        } catch (Exception e) {
            e.printStackTrace();
            session.rollback();
        } finally {
            session.close();
        }
    }