目录

1.用户需求

2.数据库设计

3.Java后台实现

3.1Mybatis对应的配置文件GoodsCollectDao.xml

3.2 GoodsCollectDao实现

3.3 Service接口及实现

4.微信小程序实现

4.1index.wxml

4.2 index.wxss

5.我的收藏效果

1.用户需求

我的收藏需求如下：

1).在小程序的底部菜单中，新增“我的收藏”，显示收藏商品列表。点收藏某个商品后，跳转到商品详情

2).商品详情页面，可以收藏和取消收藏。

3).商品下架后，自动删除用户收藏的商品。

2.数据库设计

数据库表结构，比较简单，把用户id和商品id保存即可，如下：

CREATE TABLE `goods_collect` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键',
  `gmt_create` datetime NOT NULL COMMENT '创建时间',
  `goods_id` int(11) NOT NULL COMMENT '商品id',
  `member_id` int(11) DEFAULT NULL COMMENT '用户id',
  PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 comment="收藏商品";

3.Java后台实现

3.1Mybatis对应的配置文件GoodsCollectDao.xml

内容如下：

<?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.ddc.dao.goods.GoodsCollectDao">
    <resultMap id="BaseResultMap" type="com.ddc.model.goods.GoodsCollect">
        <id column="id" jdbcType="INTEGER" property="id"/>
        <result column="gmt_create" jdbcType="TIMESTAMP" property="gmtCreate"/>
        <result column="goods_id" jdbcType="INTEGER" property="goodsId"/>
        <result column="member_id" jdbcType="INTEGER" property="memberId"/>
    </resultMap>

    <sql id="Base_Column_List">
        id, gmt_create, goods_id, member_id
    </sql>


    <select id="queryApilistPage" resultType="map" parameterType="object">
        select  c.id AS catId,g.main_img as imgUrl, g.goods_name as goodsName, g.id as goodsId, g.goods_price as price,
        wholesale_price as wholePrice,
        DATE_FORMAT(g.gmt_create,'%Y-%m-%d') as createTime,g.goods_sales AS goodsSales,c.cat_name AS catName
        ,g.goods_status AS goodStatus
        FROM goods_info g
        LEFT JOIN goods_cat c ON g.cat_id = c.id
        LEFT JOIN goods_collect d ON d.goods_id=g.id
        where d.member_id=${pd.memberId}
        <if test="pd.goodsName != null and pd.goodsName != ''">
            and g.goods_name like CONCAT('%',#{pd.goodsName},'%')
        </if>
        <if test="pd.orderBy != null and pd.orderBy != ''">
            ${pd.orderBy}
        </if>
    </select>
    <select id="queryByGoodIdAndMemberId"  resultMap="BaseResultMap"  parameterType="com.ddc.model.goods.GoodsCollect">
        select id, gmt_create, goods_id, member_id from goods_collect
        where goods_id = #{goodsId} and member_id=#{memberId}
    </select>
    <delete id="delete" parameterType="com.ddc.model.goods.GoodsCollect">
        delete from goods_collect  where goods_id = #{goodsId} and member_id=#{memberId}
    </delete>

    <insert id="insert" keyColumn="id" keyProperty="id" parameterType="com.ddc.model.goods.GoodsCollect" useGeneratedKeys="true">
        insert into goods_collect (gmt_create, goods_id, member_id)  values (now(), #{goodsId}, #{memberId})
    </insert>

</mapper>

3.2 GoodsCollectDao实现

代码如下：

public interface GoodsCollectDao {
    //我的收藏商品列表
    List<Map<String, Object>> queryApilistPage(Page pages);
    //收藏
    int insert(GoodsCollect goodsCollect);
    //取消收藏
    int delete(GoodsCollect goodsCollect);
    //查询商品是否被用户收藏
    GoodsCollect queryByGoodIdAndMemberId(GoodsCollect goodsCollect);
}

3.3 Service接口及实现

接口代码如下：

public interface GoodsCollectService {
    //我的收藏商品列表
    List<Map<String, Object>> queryApilistPage(Page pages);
    //收藏
    void insert(GoodsCollect goodsCollect);
    //取消收藏
    void delete(GoodsCollect goodsCollect);
    //查询商品是否被用户收藏
    GoodsCollect queryByGoodIdAndMemberId(GoodsCollect goodsCollect);
}

实现代码如下：

@Service
public class GoodsCollectServiceImpl implements GoodsCollectService {

    @Resource
    private GoodsCollectDao goodsCollectDao;
    //我的收藏商品列表
    public List<Map<String, Object>> queryApilistPage(Page pages){
        return goodsCollectDao.queryApilistPage(pages);
    }
    //收藏
    public void insert(GoodsCollect goodsCollect){
        goodsCollectDao.insert(goodsCollect);
    }
    //取消收藏
    public void delete(GoodsCollect goodsCollect){
        goodsCollectDao.delete(goodsCollect);
    }
    //查询商品是否被用户收藏
    public GoodsCollect queryByGoodIdAndMemberId(GoodsCollect goodsCollect){
       return goodsCollectDao.queryByGoodIdAndMemberId(goodsCollect);
    }
}

4.微信小程序实现

4.1index.wxml

<view class='ddc-search-box'>
  <view class='inp'>
    <input value='{{searchKey}}' type='text' bindinput="searchInput" placeholder='搜索' />
  </view>
 <view class='search-btn' bindtap='searchBtn'>搜索</view>
</view>
<scroll-view scroll-y='true' style="height:{{scrollViewHeight}}px" bindscrolltolower='getGoodList'>
<view class='ddc-category-box'>
<block wx:if='{{goodsList.length!=0}}'>
    <view class='active-wrap' wx:for='{{goodsList}}' wx:key='index'>
      <view class='pic'>
        <image src='{{item.imgUrl}}' data-src="{{item.imgUrl}}"  bindtap="enlarge" />
      </view>
      <view class='txt' data-goodsid='{{item.goodsId}}'  data-goodstatus='{{item.goodStatus}}' bindtap='viewDetail'>
        <view class='title'>{{item.goodsName}}</view>
        <view class='ddc-info'>
          <view>￥{{item.price}}</view>
          <view>已售{{item.goodsSales==null?'0':item.goodsSales}}</view>
          <view>
            <text>了解详情</text>
          </view>
        </view>
      </view>
    </view>
  </block>
  <view class='no-data' wx:if='{{goodsList.length==0}}'>暂无数据</view>
</view>
</scroll-view>

4.2 index.wxss

page{background: #fff;}
.ddc-category-box{ margin-top: 10px}
.active-wrap{margin: 5px 15px; background: #f5f5f5; padding: 8px 5px 5px 5px}
.active-wrap.recom-area { margin-bottom: 30px;}
.active-wrap{display: flex;border-radius: 5px;}
.active-wrap .pic{flex:1;}
.active-wrap .pic image{ width:100px;height: 60px}
.active-wrap .txt{flex:4; padding-left: 10px}
.active-wrap .txt .title{font-size: 14px}
.active-wrap .ddc-info{display: flex; font-size: 14px; padding-top: 10px}
.active-wrap .ddc-info view{ flex: 1}
.active-wrap .ddc-info view:nth-of-type(1){ color: #fc6737}
.active-wrap .ddc-info view:nth-of-type(3) text{ background: #07c160; font-size: 12px; color: #ffffff; border-radius: 5px; padding: 2px 0px}
#tab-title .icon-sort image{ width: 8px; height: 6px; }
.ddc-search-box{margin-top: 10px; display: flex; padding: 0px 20px}
/* .ddc-search-box view{ flex: 1} */
.ddc-search-box .inp{ width: 100%; height: 32px; border: 1px solid #e5e5e5; font-size: 14px; padding-left: 10px; border-radius: 5px;vertical-align:middle;}
.search-btn{ width: 80px;font-size: 14px; background:#07c160;border-radius: 5px; color: #ffffff; text-align: center; line-height: 32px; margin-left: 10px}
.no-data{ font-size: 14px; text-align: center;}
.titlenotshow{display:none}
.titleshow{display:block}

.backHome{  height: 30px;background:#07c160; color: #ffffff;font-size: 14px; 
  display: flex;flex-direction:center;justify-content: center;align-items: center; }
.backHome .backtext{width: 33%;}
.backHome .gwtitle{text-align:center;font-size: 16px; }

5.我的收藏效果