===============
MyBatis查询一条
===============

public interface StudentDao {
    ...
    // 查询一个
    public Student one(String number);
    ...
}

<mapper>
    ...
    <!-- 查询一个 -->
    <select id="one" resultType="cn.tedu.hellomybatis.pojo.Student">
        select id, number, name, gender, age from t_student
        where number=#{number}
    </select>
    ...
</mapper>

public class StudentDaoTest {
    ...
    // 测试查询一个
    @Test
    public void testOne() {
        try {
            // SQL会话
            SqlSession session = new SqlSessionFactoryBuilder()
                .build(Resources.getResourceAsStream("mybatis-config.xml"))
                .openSession();
            // 数据访问对象
            StudentDao dao = session.getMapper(StudentDao.class);

            // 查询一个
            Student student = dao.one("1001");
            // 打印一个
            System.out.println(student);
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }
    ...
}

例程：HelloMyBatis