mybatis if-else(写法)

mybaits 中没有else要用chose when otherwise 代替

范例一

<!--批量插入用户-->
<insert id="insertBusinessUserList" parameterType="java.util.List">insert into `business_user` (`id` , `user_type` , `user_login` )values<foreach collection="list" index="index" item="item" separator=","><trim prefix="(" suffix=")" suffixOverrides=","><choose><when test="item.id != null and item.id !=''">#{item.id,jdbcType=CHAR},</when><otherwise>'',</otherwise></choose><choose><when test="item.userType != null and item.userType !=''">#{item.userType,jdbcType=VARCHAR},</when><otherwise>'',</otherwise></choose></trim></foreach>
</insert>

其中choose为一个整体 
when是if 
otherwise是else

范例二：

<select id="selectSelective" resultMap="xxx" parameterType="xxx">select<include refid="Base_Column_List"/>from xxxwhere del_flag=0<choose><when test="xxx !=null and xxx != ''">and xxx like concat(concat('%', #{xxx}), '%')</when><otherwise>and xxx like '**%'</otherwise></choose>
</select>

下面就是MyBatis中的if....else...表示方法

 

<choose><when test="">//...</when><otherwise>//...</otherwise>
</choose>