insertSelective---Java MyBatis 插入数据库返回主键--insertSelective这样就不用每次到数据库里面查询了

https://www.cnblogs.com/xingyunblog/p/6243179.html

列子：

<!-- 插入一个商品 -->

    <insert id="insertProduct" parameterType="domain.model.ProductBean" >

       <selectKey resultType="java.lang.Long" order="AFTER" keyProperty="productId">

          SELECT LAST_INSERT_ID()

      </selectKey>

        INSERT INTO t_product(productName,productDesrcible,merchantId)values(#{productName},#{productDesrcible},#{merchantId});

    </insert>

我写的：

<insert id="insertSelective" parameterType="com.runfast.waimai.dao.model.RunfastBusinessType">
  <selectKey resultType="java.lang.Integer" order="AFTER" keyProperty="id">
    SELECT LAST_INSERT_ID()
  </selectKey>
  insert into newrunfast.runfast_business_type