mybatis Generator 工具的使用 DML增删改

mybatis Generator 工具的使用 DML增删改

1.添加用户

点击查看代码

public static void main(String[] args) {
        //添加用户
        UsersService usersService = new UsersServiceImpl();
        Users users = new Users();
        users.setUsername("wwd");
        users.setUsersex("nan");
        int i = usersService.insertUsers(users);
        System.out.println(i);
    }

2.修改用户

点击查看代码

public int updateUsers(Users users) {
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UsersMapper mapper = sqlSession.getMapper(UsersMapper.class);
        int i = mapper.updateByPrimaryKey(users);
        sqlSession.commit();
        return i;
    }

3.删除用户

点击查看代码

public int deleteUsersById(int i) {
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UsersMapper mapper = sqlSession.getMapper(UsersMapper.class);
        int i1 = mapper.deleteByPrimaryKey(i);
        sqlSession.commit();
        return i1;
    }