[mybatis]缓存_一级缓存

Posted 2022-02-11 唐火

  @Test
    public void test05() throws IOException 
        SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();

        SqlSession sqlSession = sqlSessionFactory.openSession();

        try
        

            EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);

            Employee emp01 = mapper.getEmpById(1);

            System.out.println(emp01);

              Employee emp02 =   mapper.getEmpById(1);

            System.out.println(emp02);

            System.out.println(emp01==emp02);

        finally 

            sqlSession.close();

        
    

可以看到只调用了一次sql语句，而且两次创建的Employee对象是同一个