我自己用

GoodsCateVO

package com.zjdfwl.mall.restfulapi.modular.goods.controller.vo;

import java.io.Serializable;
import java.util.List;

/**
 * 产品类别 展示类
 * @author Administrator
 *
 */
public class GoodsCateVO implements Serializable {

    /**
    * 
    */
    private static final long serialVersionUID = 5010898519808673759L;
    
    private Integer id;
    /**
     * 商品分类编号
     */
    private String cateSn;
    /**
     * 产品类别名字
     */
    private String name;
    /**
     * 产品类别图片
     */
    private String goodsGallery;
    /**
     * 产品类别图标
     */
    private String logo;
    /**
     * 产品类别简介
     */
    private String goodsCateDesc;
    /**
     * 产品类别id
     */
    private Integer pid;

    /**
     * 子列表
     */
    List<GoodsCateVO> child;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getCateSn() {
        return cateSn;
    }

    public void setCateSn(String cateSn) {
        this.cateSn = cateSn;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGoodsGallery() {
        return goodsGallery;
    }

    public void setGoodsGallery(String goodsGallery) {
        this.goodsGallery = goodsGallery;
    }

    public String getLogo() {
        return logo;
    }

    public void setLogo(String logo) {
        this.logo = logo;
    }

    public String getGoodsCateDesc() {
        return goodsCateDesc;
    }

    public void setGoodsCateDesc(String goodsCateDesc) {
        this.goodsCateDesc = goodsCateDesc;
    }

    public Integer getPid() {
        return pid;
    }

    public void setPid(Integer pid) {
        this.pid = pid;
    }

    public List<GoodsCateVO> getChild() {
        return child;
    }

    public void setChild(List<GoodsCateVO> child) {
        this.child = child;
    }

}

controller

    @RequestMapping("catelist")
    public ResultEntity cateList() {
        try {
            List<GoodsCateVO> resultList = (List<GoodsCateVO>) JedisUtils.getObject(CacheConsts.CACHE_GOODS_CATE);
            if (resultList == null || resultList.size() == 0) {
                Page<GoodsCate> page = new Page<GoodsCate>(1, -1);
                page.setSearchCount(false);
                Wrapper<GoodsCate> wrapper = new EntityWrapper<GoodsCate>().eq("is_enable", 1).eq("is_deleted", 0)
                        .orderBy("level,sort_num", true);
                page = goodsCateService.selectPage(page, wrapper);
                resultList = new ArrayList<GoodsCateVO>();
                if (page != null && page.getRecords().size() > 0) {
                    for (GoodsCate goodsCate : page.getRecords()) {
                        if (goodsCate.getPid() == 0) {
                            GoodsCateVO goodsCateVO = new GoodsCateVO();
                            BeanUtil.copyProperties(goodsCate, goodsCateVO);
                            List<GoodsCateVO> childList = new ArrayList<GoodsCateVO>();
                            forChildList(childList, page.getRecords(), goodsCate.getId());
                            goodsCateVO.setChild(childList);
                            resultList.add(goodsCateVO);
                        }
                    }
                }
                if (resultList.size() > 0) {
                    JedisUtils.setObject(CacheConsts.CACHE_GOODS_CATE, resultList,
                            CacheConsts.CACHE_GOODS_CATE_EXPIRE_TIME);
                }
            }
            return success(resultList);
        } catch (Exception e) {
            logger.error("goods.catelist() --> ", e);
        }
        return error(ResultCode.SYS_ERROR);
    }

/**
* 分类列表：递归循环子节点
*
* @param childList
* @param dataList
* @param pId
*/
public void forChildList(List<GoodsCateVO> childList, List<GoodsCate> dataList, Integer pId) {
for (GoodsCate goodsCate : dataList) {
if (pId.equals(goodsCate.getPid())) {
GoodsCateVO goodsCateVO = new GoodsCateVO();
BeanUtil.copyProperties(goodsCate, goodsCateVO);
childList.add(goodsCateVO);
}
}
}

mapper.xml

    <select SELECT1>
        SELECT t1.id FROM m_shop_info t1 INNER JOIN m_goods_area_info t2 ON t1.id = t2.shop_id WHERE  t1.is_enable = 1
        AND t1.is_deleted = 0
        AND t2.is_enable = 1
        AND t2.is_deleted = 0
        AND t2.area = #{area}
    </select>

    <select SELECT2>
        SELECT t3.goods_id FROM m_shop_goods t3 INNER JOIN ( SELECT1 ) t4 ON t3.shop_id = t4.id WHERE t3.is_enable = 1 AND t3.is_deleted = 0
    </select>

    <select SELECT3>

        SELECT t5.goods_cate_id, count( t5.goods_cate_id ) AS num FROM  m_goods_base_info t5 INNER JOIN ( SELECT2 ) t6 ON t5.id = t6.goods_id
        WHERE  t5.is_enable = 1
        AND t5.is_deleted = 0
        GROUP BY
        t5.goods_cate_id

    </select>
    <select id="selectIndexCateList" resultType="map"
        parameterType="com.baomidou.mybatisplus.plugins.Page">
        SELECT t7.id, t7.name, t7.logo
        FROM  m_goods_cate t7
        LEFT JOIN (SELECT3) t8 ON t7.id = t8.goods_cate_id
        WHERE
        t7.is_enable = 1
        AND t7.is_deleted = 0
        ORDER BY
        t8.num DESC,
        t7.id ASC
    </select>