<?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.SupplierEnclosureMapper"> <select id="getPage" resultType="cn.wise.sc.cement.business.entity.SupplierEnclosure"> select se.* from supplier_enclosure se <if test="params.supplierId != null"> where se.supplier_id = #{params.supplierId} </if> </select> </mapper>