MyBatis-14 结果映射Collection

package com.cd;

import java.util.List;

public class Customer {
    private int id;
    String name;
    List<Order> orders;

    public Customer() {
        super();
    }

    public Customer(int id, String name, List<Order> orders) {
        super();
        this.id = id;
        this.name = name;
        this.orders = orders;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<Order> getOrders() {
        return orders;
    }

    public void setOrders(List<Order> orders) {
        this.orders = orders;
    }
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.cd.CustomerMapper">

    <resultMap type="Customer" id="myCustomer">
        <id property="id" column="id" />
        <result property="name" column="c_name" />
        <collection property="orders" ofType="Order">
            <id column="id" property="id"/>
            <result column="o_name" property="name"/>
        </collection>
    </resultMap>

    <select id="selectCustomerByOrderId" resultMap="myCustomer" resultType="Customer">
        select
            c.id,
            c.name as c_name,
            o.name as o_name
        from customer_tbl as c
        left join order_tbl as o
        on c.id = o.cid
        where c.id=#{id}
    </select>

</mapper>

package com.cd;

import java.util.List;

public interface CustomerMapper {
    public List<Order> selectOrders();
    public Customer selectCustomerByOrderId(int id);
}

package com.cd;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

public class Test {

    public static void main(String[] args) {
        String resource = "com/cd/mybatis-config.xml";
        InputStream inputStream;
        try {
            inputStream = (InputStream) Resources.getResourceAsStream(resource);
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            SqlSession session = sqlSessionFactory.openSession();
            CustomerMapper mapper = session.getMapper(CustomerMapper.class);

            Customer c = mapper.selectCustomerByOrderId(1);
            System.out.println(c);

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}