MyBatis的传入参数parameterType类型

1. MyBatis的传入参数parameterType类型分两种

   1. 1. 基本数据类型：int,string,long,Date;

   1. 2. 复杂数据类型：类和Map

2. 如何获取参数中的值:

   2.1  基本数据类型：#{参数} 获取参数中的值

   2.2  复杂数据类型：#{属性名}  ，map中则是#{key}

3.案例：

 3.1 基本数据类型案例

<sql id="Base_Column_List" >
    id, car_dept_name, car_maker_name, icon,car_maker_py,hot_type
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Long" >
    select
    <include refid="Base_Column_List" />
    from common_car_make
    where id = #{id,jdbcType=BIGINT}
  </select>

 3.2 复杂类型--map类型     

<select id="queryCarMakerList" resultMap="BaseResultMap" parameterType="java.util.Map">
        select
        <include refid="Base_Column_List" />
        from common_car_make cm
        where 1=1
        <if test="id != null">
            and  cm.id = #{id,jdbcType=DECIMAL}
        </if>
        <if test="carDeptName != null">
            and  cm.car_dept_name = #{carDeptName,jdbcType=VARCHAR}
        </if>
        <if test="carMakerName != null">
            and  cm.car_maker_name = #{carMakerName,jdbcType=VARCHAR}
        </if>
        <if test="hotType != null" >
           and  cm.hot_type = #{hotType,jdbcType=BIGINT}
        </if>
        ORDER BY cm.id
    </select>

  3.3 复杂类型--类类型

<update id="updateByPrimaryKeySelective" parameterType="com.epeit.api.model.CommonCarMake" >
   update common_car_make
   <set >
     <if test="carDeptName != null" >
       car_dept_name = #{carDeptName,jdbcType=VARCHAR},
     </if>
     <if test="carMakerName != null" >
       car_maker_name = #{carMakerName,jdbcType=VARCHAR},
     </if>
     <if test="icon != null" >
       icon = #{icon,jdbcType=VARCHAR},
     </if>
     <if test="carMakerPy != null" >
           car_maker_py = #{carMakerPy,jdbcType=VARCHAR},
     </if>
     <if test="hotType != null" >
           hot_type = #{hotType,jdbcType=BIGINT},
     </if>
   </set>
   where id = #{id,jdbcType=BIGINT}
 </update>

3.4 复杂类型--map中包含数组的情况

<select id="selectProOrderByOrderId" resultType="com.epeit.api.model.ProOrder" parameterType="java.util.HashMap" >
        select sum(pro_order_num) proOrderNum,product_id productId,promotion_id promotionId
        from pro_order
        where 1=1
        <if test="orderIds != null">
          and
            <foreach collection="orderIds" item="item" open="order_id IN(" separator="," close=")">
                #{item,jdbcType=BIGINT}
            </foreach>
        </if>
        GROUP BY product_id,promotion_id
    </select>

4.注意点：

   记住这些

原文转载来自 http://blog.csdn.net/u010235716/article/details/51698422