对

好的，以下是示例代码：

Company.java：

public class Company {
    private int id;
    private String name;
    private List<Employee> employees;

    // getters and setters
    // ...

    // toString method
    // ...
}

Employee.java：

public class Employee {
    private int id;
    private String name;

    // getters and setters
    // ...

    // toString method
    // ...
}

CompanyMapper.xml：

<mapper namespace="com.example.mapper.CompanyMapper">
    <resultMap id="companyResultMap" type="com.example.model.Company">
        <id property="id" column="id" />
        <result property="name" column="name" />
        <collection property="employees" ofType="com.example.model.Employee">
            <id property="id" column="employee_id" />
            <result property="name" column="employee_name" />
        </collection>
    </resultMap>

    <select id="getCompanyById" resultMap="companyResultMap">
        SELECT c.id, c.name, e.id AS employee_id, e.name AS employee_name
        FROM Company c
        LEFT JOIN Employee e ON c.id = e.company_id
        WHERE c.id = #{id}
    </select>
</mapper>

CompanyMapper.java：

public interface CompanyMapper {
    Company getCompanyById(int id);
}

使用示例：

SqlSession sqlSession = sqlSessionFactory.openSession();
try {
    CompanyMapper companyMapper = sqlSession.getMapper(CompanyMapper.class);
    Company company = companyMapper.getCompanyById(1);
    System.out.println(company);
} finally {
    sqlSession.close();
}

需要注意的是，示例代码中的Mapper和Model类的命名可能需要根据你的实际情况进行调整。另外，示例代码中的SQL语句使用了LEFT JOIN，如果你的数据库中一个公司可能没有员工，那么可以使用该语句来查询。如果你的数据库中一个公司一定有员工，则可以使用INNER JOIN来查询。