public class Emp{    private Integer empno;    private String ename;    private String job;    private Integer mgr;    private Date hiredate;    private Double sal;    private Double comm;    private Integer deptno;}public interface EmpDao{    public void save(Emp emp);    public Integer update(Emp emp);    public Integer delete(Integer empno);    @Select()    public Emp selectEmpByEmpno(Integer empno);}public class MyTest{    SqlSessionFactory sqlSessionFactory = null;    public void init(){        String resource = "mybatis-config.xml";        InputStream inputStream = null;        try{            inputStream Resources.getResourceAsStream(resource);            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);        }catch(IOException e){            e.printStackTrace();        }            }    @Test    public void test01 thorws IOException(){        String resource = "mybatis-config.xml";        InputStream inputStream = Resources.getResourceAsStream(resource);        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);        // 读取数据库会话        SqlSession sqlSession = sqlSessionFactory.openSession();        // 获取对应的映射接口对象        EmpDao mapper = sqlSession.getMapper(EmpDao.class);        // 执行具体的sql语句        Emp emp = mapper.selectEmpByEmpno(7369);        System.out.println(emp);        Integer i = mapper.save(new Emp());        System.out.println(i);// 插入不成功, 需要在EmpDao.xml或者注解中编写完整, 复杂就写配置文件        // 关闭会话        sqlSession.close();    }    @Test    public void test02() thorws IOException{        SqlSession sqlSession = sqlSessionFactory.openSession();        EmpDao mapper = sqlSession.getMapper(EmpDao.class);        Emp emp = new Emp();        emp.setEmpno(3333);        emp.setEname("zs");        Integer save = mapper.save(emp);        System.out.println(save);    }    @Test    public void test03() thorws IOException{        SqlSession sqlSession = sqlSessionFactory.openSession();        EmpDao mapper = sqlSession.getMapper(EmpDao.class);        Emp emp = new Emp();        emp.setEmpno(3333);        emp.setEname("zs");        emp.setComm(500.0);        Integer update = mapper.save(emp);        System.out.println(update);        sqlSession.commit();        sqlSession.close();    }}