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.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：基本类型

<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

<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>

3.2 复杂类型--map中包含数组

<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.注解@param

4.1：传入单一的参数，可以是一个或者多个

@Param(value="startdate") String startDate ：注解单一属性；这个类似于将参数重命名了一次

在dao层传参数的时候需要加这个注解;

List<String> selectIdBySortTime(@Param(value="startdate")String startDate);

在对应的mapper的xml中取值，需要配合@param括号中的内容:参数为startdate

<select id="selectIdBySortTime" resultType="java.lang.String" parameterType="java.lang.String">  
    select distinct ajlcid from ebd_fh_ajlc where sorttime >= to_date(#{startdate,jdbcType=VARCHAR},'YYYY-MM-DD') and created_date=updated_date   
    and keyvalue in (select  distinct companyname from ebd_fh_company_list where isupdate='0')  
  </select>

4.2：传入对象bean

注解javaBean,@Param(value="dateVo") DateVo dateVo；则需要注意编写的参数

在dao层传参数的时候需要加这个注解;

List<String> selectIds(@Param(value="dateVo")DateVo dateVo);

在对应的mapper的xml中取值；

<select id="selectIds" resultType="java.lang.String" parameterType="com.api.entity.DateVo">  
    select distinct ajlcid from ebd_fh_ajlc where sorttime >= to_date(#{dateVo.startDate,jdbcType=VARCHAR},'YYYY-MM-DD') and created_date=updated_date   
    and keyvalue in (select  distinct companyname from ebd_fh_company_list where isupdate='0')  
 </select>

Mybatis的传入参数parameterType类型

猜你喜欢