<?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="com.example.mypulsar.campusDao.CampusDao"> <select id="selectClassRoom" resultType="com.example.mypulsar.bean.ClassRoom" parameterType="java.lang.String"> select * from XA_ClassRoom where SchoolId = ${SchoolId} and State = 1 and Pid > 0; </select> </mapper>