<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="cn.wise.sc.cement.business.mapper.SysUserEnclosureMapper"> <select id="getPage" resultType="cn.wise.sc.cement.business.entity.SysUserEnclosure"> select sue.* from sys_user_enclosure sue <if test="params.userId != null"> where sue.user_id = #{params.userId} </if> </select> </mapper>