Mybatis 插入数据并返回刚刚插入的数据id
1.在Mybatis Mapper文件中添加属性“useGeneratedKeys”和“keyProperty”,其中keyProperty是Java对象的属性名,而不是表格的字段名。
2.Mybatis执行完插入语句后,自动将自增长值赋值给对象systemBean的属性id。因此,可通过systemBean对应的getter方法获取!
示列
<insert id="insert" parameterType="Merchant.model.BaoShopPic" useGeneratedKeys="true" keyProperty="picId" >
insert into bao_shop_pic
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="picId != null">
pic_id,
</if>
<if test="shopId != null">
shop_id,
</if>
</trim>
values
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="picId != null">
#{picId},
</if>
<if test="shopId != null">
#{shopId},
</if>
</trim>
</insert>