mybatis模糊查询

原先查询片段如下，自动生成的代码默认只能全字段匹配查询

 <if test="hobby != null and hobby != ''">
       and HOBBY = #{hobby}
 </if>
 <if test="code != null and code != ''">
       and CODE = #{code}
 </if>

现要对code字段的值实现模糊查询，如下

 <if test="hobby != null and hobby != ''">
        and HOBBY = #{hobby}
 </if>
 <if test="code != null and code != ''">
        and CODE like concat(concat('%',#{code}),'%') 
 </if>