idea版本/高校新生报到系统/report/src/com/mapper/ClassesMapper.xml

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<?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.dao.ClassesDao" >
    <resultMap id="BaseResultMap" type="com.entity.Classes" >
    <id column="claid" property="claid" jdbcType="INTEGER" />
    <result column="claname" property="claname" jdbcType="VARCHAR" />
    <result column="maid" property="maid" jdbcType="INTEGER" />
  </resultMap>
  <sql id="Base_Column_List" >
    claid, claname, maid
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from classes
    where claid = #{claid,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete from classes
    where claid = #{claid,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.entity.Classes" >
    insert into classes (claid, claname, maid
      )
    values (#{claid,jdbcType=INTEGER}, #{claname,jdbcType=VARCHAR}, #{maid,jdbcType=INTEGER}
      )
  </insert>
  <insert id="insertSelective" parameterType="com.entity.Classes" >
    insert into classes
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="claid != null" >
        claid,
      </if>
      <if test="claname != null" >
        claname,
      </if>
      <if test="maid != null" >
        maid,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="claid != null" >
        #{claid,jdbcType=INTEGER},
      </if>
      <if test="claname != null" >
        #{claname,jdbcType=VARCHAR},
      </if>
      <if test="maid != null" >
        #{maid,jdbcType=INTEGER},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.entity.Classes" >
    update classes
    <set >
      <if test="claname != null" >
        claname = #{claname,jdbcType=VARCHAR},
      </if>
      <if test="maid != null" >
        maid = #{maid,jdbcType=INTEGER},