mybatisiftest不为空字符串或null的解决
目录
mybatis if test 不为空字符串或null
mybatis中if test判断数值字符串注意项
总结
mybatis if test 不为空字符串或null<sql id="public_content">
<if test="productId != null and productId !=''" >
and a.product_id = #{productId,jdbcType=VARCHAR}
</if>
<if test="productDefinId != null" >
and a.product_defin_id = #{productDefinId,jdbcType=VARCHAR}
</if>
<if test="productUid != null and productUid !=''">
and a.product_uid = #{productUid,jdbcType=VARCHAR}
</if>
<if test="productKey != null" >
and a.product_key = #{productKey,jdbcType=VARCHAR}
</if>
<if test="prouuctSecret != null" >
and a.prouuct_secret = #{prouuctSecret,jdbcType=VARCHAR}
</if>
<if test="productPass != null" >
and a.product_pass = #{productPass,jdbcType=VARCHAR}
</if>
<if test="productVisitPass != null" >
and a.product_visit_pass = #{productVisitPass,jdbcType=VARCHAR}
</if>
<if test="createTime != null and createTime !=''" >
and a.create_time = #{createTime,jdbcType=VARCHAR}
</if>
<if test="pageSize != null and pageNum !=null " >
ORDER BY a.product_id DESC limit #{pageNum},#{pageSize}
</if>
</sql>
mybatis中if test判断数值字符串注意项
<if test="cutList != null">
<if test="isInterrupt == '1'.toString() ">
AND A.basic_id IN (
<foreach collection="cutList" item="item" index="index" separator="," >
#{item}
</foreach>
)
</if>
<if test="isInterrupt == '0'.toString() ">
AND A.basic_id NOT IN (
<foreach collection="cutList" item="item" index="index" separator="," >
#{item}
</foreach>
)
</if>
</if>
1. Mybatis中 if test 判断数值字符串注意项
if test 判断是否为某一数值字符串时需在数值字符串后加上toString()方法
如：
<if test="isInterrupt == '1'.toString() ">
2. Mybatis中遍历list入参
此处还有个知识点是mybatis使用foreach标签来遍历入参list。
如：
<if test="isInterrupt == '1'.toString() ">
AND A.basic_id IN (
<foreach collection="cutList" item="item" index="index" separator="," >
#{item}
</foreach>
)
</if>
collection为需遍历数组，item为当前循环的变量，index为计数器，separator=","指循环一次则以“,”分隔
这里IN 的（）可以直接用open="(" close=")"属性设置
<foreach collection="cutList" item="item" index="index" open="(" close=")" separator="," >
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持软件开发网。
