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<?xml version="1.0" encoding="UTF-8" ?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
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<mapper namespace="com.itheima.dao.ClassDao" >
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<!--分页查询-->
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<select id="getClassList" parameterType="Class" resultType="Class">
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select *from d_class
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<where>
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<if test="c_classname!=null and c_classname!='' ">
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and c_classname like '%${c_classname}%'
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</if>
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<if test="c_counsellor!=null and c_counsellor!=''">
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and c_counsellor like '%${c_counsellor}%'
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</if>
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<if test="c_classid!=null and c_classid!=0">
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and c_classid like '%${c_classid}%'
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</if>
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</where>
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ORDER BY c_id asc
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limit #{currentPage},#{pageSize}
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</select>
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<!--查询数据总数-->
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<select id="totalCount" resultType="Integer">
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select count(c_id) from d_class
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<where>
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<if test="c_classname!=null and c_classname!='' ">
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and c_classname like '%${c_classname}%'
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</if>
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<if test="c_counsellor!=null and c_counsellor!=''">
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and c_counsellor like '%${c_counsellor}%'
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</if>
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<if test="c_classid!=null and c_classid!=0">
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and c_classid like '%${c_classid}%'
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</if>
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</where>
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</select>
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<!--通过id删除班级信息-->
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<delete id="deleteClass" parameterType="Integer" >
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delete from d_class where c_id=#{c_id}
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</delete>
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<!--添加班级信息-->
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<insert id="addClass" parameterType="Class" keyProperty="c_id" useGeneratedKeys="true">
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insert into d_class (c_classid,c_classname,c_counsellor)
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values(#{c_classid},#{c_classname},#{c_counsellor})
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</insert>
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<select id="findClassById" parameterType="Integer" resultType="Class" >
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select * from d_class where c_id=#{c_id}
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</select>
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<!--修改班级信息-->
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<update id="updateClass" parameterType="Class">
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update d_class
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<set>
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<if test="c_classid!=null and c_classid!=0">
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c_classid=#{c_classid},
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</if>
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<if test="c_classname !=null and c_classname !=''">
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c_classname=#{c_classname},
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</if>
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<if test="c_counsellor !=null and c_counsellor !=''">
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c_counsellor=#{c_counsellor},
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</if>
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</set>
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where c_id = #{c_id}
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</update>
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<!--Mybatis使用Collection进行表关联查询关联一对多数据类型(class为一，student为多)，且需要有id-->
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<!--Association关联一对一类型-->
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<!--班级人员信息查询信息-->
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<resultMap type="com.itheima.po.Class" id="cardAndInfo2">
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<id property="c_id" column="c_id"/>
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<result property="c_classid" column="c_classid"/>
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<result property="c_classname" column="c_classname"/>
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<result property="c_counsellor" column="c_counsellor"/>
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<collection property="students" ofType="com.itheima.po.Student" javaType="ArrayList">
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<id property="s_id" column="s_id"/>
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<result property="s_studentid" column="s_studentid"/>
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<result property="s_name" column="s_name"/>
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<result property="s_sex" column="s_sex"/>
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<result property="s_age" column="s_age"/>
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<result property="s_phone" column="s_phone"/>
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<result property="s_classid" column="s_classid"/>
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<result property="s_classname" column="s_classname"/>
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<result property="s_dormitoryid" column="s_dormitoryid"/>
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</collection>
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</resultMap>
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<!--SQL选择属性与构造的resultMap属性名要一致-->
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<select id="findClassStudent" parameterType="Class" resultMap="cardAndInfo2">
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SELECT uclass.c_id as c_id,uclass.c_classid as c_classid,uclass.c_classname as c_classname,uclass.c_counsellor as c_counsellor,
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student.s_id as s_id,student.s_studentid as s_studentid,student.s_name as s_name,student.s_sex as s_sex,student.s_age as s_age,
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student.s_phone as s_phone,student.s_classid as s_classid,student.s_classname as s_classname,student.s_dormitoryid as s_dormitoryid
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FROM d_class uclass join d_student student
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on uclass.c_classid = student.s_classid
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and uclass.c_classname = student.s_classname
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where uclass.c_classid = #{c_classid}
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and uclass.c_classname = #{c_classname}
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</select>
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<select id="getAll" resultType="Class">
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select * from d_class;
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</select>
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</mapper>
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