1.jsp页面
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<label>日期:
<input type="text" name="searchTime" data-toggle="datepicker" data-pattern="yyyy-MM-dd" value="${}" size="20" placeholder="请输入时间" >
</label>
<td>
<fmt:formatDate value="${u.recordTime}" pattern="yyyy-MM-dd HH:mm:ss"/>
</td>
2.mapper
<if test="searchTime!= null and searchTime!= ''">and DATE_FORMAT(f.recordTime,'%y-%m-%d') = DATE_FORMAT( #{searchTime},'%y-%m-%d')</if>