MyBatis源码解读

（5）编写测试类fJ5拜客生活常识网

Demo.javafJ5拜客生活常识网

public class Demo {
    public static void main(String[] args) throws IOException {
        // 获取配置文件输入流
        InputStream inputStream = Resources.getResourceAsStream("mybatis-config.xml");
        // 创建 SqlSessionFactory
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        // 获取 SqlSession
        SqlSession sqlSession = sqlSessionFactory.openSession();
        // 获取 Mapper 接口
        UserDao userDao = sqlSession.getMapper(UserDao.class);
        // 新增一个用户
        User newUser = new User();
        newUser.setUsername("new-user");
        newUser.setNickName("新建的用户（修改前）");
        newUser.setPassword("123123");
        newUser.setPhone("13900001111");
        newUser.setCreateTime("2022-07-14 16:00:00");
        userDao.insert(newUser);
        // 根据用户名获取用户信息
        User user = userDao.findByUsername("new-user");
        System.out.println("########## 修改前用户信息 ##########");
        System.out.println(new Gson().toJson(user));
        // 修改用户信息
        user.setUsername("update-user");
        user.setNickName("新建的用户（修改后）");
        userDao.update(user);
        user = userDao.findByUsername("update-user");
        System.out.println("########## 修改后用户信息 ##########");
        System.out.println(new Gson().toJson(user));
        // 删除用户
        userDao.deleteById(user.getId());
    }
}

输出结果：fJ5拜客生活常识网

########## 修改前用户信息 ##########
{"id":5,"username":"new-user","nickName":"新建的用户（修改前）","password":"123123","phone":"13900001111","createTime":"2022-07-14 16:00:00"}
########## 修改后用户信息 ##########
{"id":5,"username":"update-user","nickName":"新建的用户（修改后）","password":"123123","phone":"13900001111","createTime":"2022-07-14 16:00:00"}

fJ5拜客生活常识网