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Mybatis 笔记

一、 Mybatis可以获取插入记录的自增长主键ID

1.在插入语句<insert>标签中添加属性“useGeneratedKeys”和“keyProperty”,其中keyProperty是Java对象的属性名,而不是数据表的字段名。

 1  <insert id="insertPartnerUser" parameterType="com.paycloud.interfaces.dto.PartnerUserDto" useGeneratedKeys="true" keyProperty="puid">
 2           insert into wp_partners_user
 3           <trim prefix="(" suffix=")" prefixOverrides=",">
 4               <if test="partnerId != null and partnerId != ‘‘">,       PARTNER_ID   </if>
 5               <if test="partnerName != null and partnerName != ‘‘">,   PARTNER_NAME </if>
 6           </trim>
 7           <trim prefix="VALUES (" suffix=")" prefixOverrides=",">
 8               <if test="partnerId != null and partnerId != ‘‘">,     #{partnerId}   </if>
 9               <if test="partnerName != null and partnerName != ‘‘">, #{partnerName} </if>
10          </trim>
11   </insert >

 

2.Mybatis执行完插入SQL语句后,自动将自增长主键赋值给对象JavaBean的属性puid。然后,通过 PartnerUserDto 对应的getter方法可获取puid值!

  Integer puid =  PartnerUserDto.getPuid();

 

Mybatis 笔记