Mybatis之if标签判断boolean值

一、普通的字符串类型判断空逻辑

		<if test="query.activity != null and query.activity != ''">
             AND extra.activity =  #{query.activity}
        if>
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二、Boolean类型判断

		<if test="!query.originalVirtualCode">
         	  AND extra.original_virtual_code is null
        if>
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