OrderDao.xml

<?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="cn.devmgr.tutorial.OrderDao" >
    <resultMap id="wholeOrderMap" type="cn.devmgr.tutorial.model.Order">
        <id property="id" column="id" />
        <result property="orderDate" column="order_date" />
        <result property="orderType" column="order_type" typeHandler="org.apache.ibatis.type.EnumTypeHandler" />
        <association property="consigneeAddress" javaType="cn.devmgr.tutorial.model.ConsigneeAddress" resultMap="orderAddress" />
        <collection property="orderItems" column="id" ofType="cn.devmgr.tutorial.model.OrderItem" select="selectOrderItem">
        </collection>
    </resultMap>

    <resultMap id="orderAddress" type="cn.devmgr.tutorial.model.ConsigneeAddress">
        <result property="consignee" column="consignee" />
        <result property="phone" column="phone" />
        <result property="province" column="province" />
        <result property="city" column="city" />
        <result property="district" column="district" />
        <result property="address" column="address" />
    </resultMap>
    
    <sql id="orderMainColumnsWithoutId"> consignee, phone, province, city, district, address, order_date, order_type, status</sql>
    
    <select id="getOrderById" resultMap="wholeOrderMap">
        select id, <include refid="orderMainColumnsWithoutId" />
	        from order_main
	        where id=#{id}
    </select>
    
    <select id="selectOrderItem" resultType="cn.devmgr.tutorial.model.OrderItem">
        select id, order_id, product_id, product_name, num, price
	        from order_detail
	        where order_id=#{id}
    </select>
    
    <!-- 多个insert sql时，useGeneratedKeys="true" keyProperty="order.id" 不起作用，1个起作用
        selectKey会起作用
     -->
    <insert id="insertOrder" useGeneratedKeys="true" keyProperty="order.id" parameterType="cn.devmgr.tutorial.model.Order">
        <selectKey keyProperty="order.id" resultType="int">
            select currval('order_main_id_seq');
        </selectKey>
        insert into order_main(<include refid="orderMainColumnsWithoutId" />)
            values(#{order.consigneeAddress.consignee}, #{order.consigneeAddress.phone}, #{order.consigneeAddress.province}, 
            #{order.consigneeAddress.city}, #{order.consigneeAddress.district}, #{order.consigneeAddress.address},  
            #{order.orderDate}, #{order.orderType, typeHandler=org.apache.ibatis.type.EnumTypeHandler}, 0);
        <foreach collection="order.orderItems" item="item" index="index" open="" separator=";"  close="">
            insert into order_detail(order_id, product_id, product_name, num, price)
                values(currval('order_main_id_seq'), #{item.productId}, #{item.productName}, #{item.num}, #{item.price});
        </foreach>
    </insert>
    
    <!-- 查询product， 演示了使用ArrayTypeHandler和自定义的JsonTypeHandler -->
    <resultMap type="cn.devmgr.tutorial.model.Product" id="product">
        <id column="id" property="id"/>
        <result column="name" property="name"/>
        <result column="price" property="price"/>
        <result column="specs" property="specs" typeHandler="cn.devmgr.tutorial.typehandler.JsonTypeHandler" />
        <result column="images" property="images" typeHandler="org.apache.ibatis.type.ArrayTypeHandler" />
    </resultMap>
    <select id="selectProductById" resultMap="product">
        select id, name, price, specs, images
            from product
            where id=#{id}
    </select>   
    
    <!-- 在insert中使用typeHandler；注意数组用的是自定义的ArrayTypeHandler -->
    <insert id="insertProduct" parameterType="cn.devmgr.tutorial.model.Product">
        insert into product(id, name, price, specs, images) 
            values(#{product.id}, #{product.name}, #{product.price}, #{product.specs, typeHandler=cn.devmgr.tutorial.typehandler.JsonTypeHandler}, #{product.images, typeHandler=cn.devmgr.tutorial.typehandler.ArrayTypeHandler} )
    </insert>
</mapper>