<resultMap type ="Customer" id= "customerMap"> <id property ="id" column="id" /> <result property ="name" column="name" /> <result property ="age" column="age" /> <result property ="address" column="address" /> <collection property ="orders" ofType="Order" > <id property ="orderId" column="oid" /> <result property ="orderPrice" column="price" /> <result property ="orderNumber" column="orderNumber" /> </collection> </resultMap> <select id ="selectCustomerById" parameterType="string" resultMap="customerMap" > select c.id,c.name,c.age,c.address,o.id oid,o.price,o.orderNumber,o.cid from customer c,orders o where c.id=o.cid and c.id=#{id} </select> <!-- 批量插入数据 --> <insert id ="insertBatch" parameterType="list" > insert into customer(id,name,age,address) values <foreach collection ="list" item="obj" separator="," > (#{obj.id},#{obj.name},#{obj.age},#{obj.address}) </foreach> </insert>